Commit Graph

412639 Commits

Author SHA1 Message Date
Anton Blanchard 7c105b63bd powerpc: Add CONFIG_CPU_LITTLE_ENDIAN kernel config option.
With the little endian support merged, we can add the
CONFIG_CPU_LITTLE_ENDIAN kernel config option.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:22 +11:00
Alistair Popple b2ca8c895e powerpc: Don't use ELFv2 ABI to build the kernel
The kernel doesn't build correctly using the ELFv2 ABI.  This patch
ensures that the ELFv1 ABI is used when building a kernel with an
ELFv2 enabled compiler.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:21 +11:00
Rusty Russell d606b92aed powerpc: ELF2 binaries signal handling
For the ELFv2 ABI, the hander is the entry point, not a function descriptor.
We also need to set up r12, and fortunately the fast_exception_return
exit path restores r12 for us so nothing else is required.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:20 +11:00
Rusty Russell 94af3abf99 powerpc: ELF2 binaries launched directly.
No function descriptor, but we set r12 up and set TIF_RESTOREALL as it
normally isn't restored on return from syscall.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:19 +11:00
Rusty Russell 918d03552e powerpc: Set eflags correctly for ELF ABIv2 core dumps.
We leave it at zero (though it could be 1) for old tasks.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:18 +11:00
Rusty Russell 373c76d622 powerpc: Add TIF_ELF2ABI flag.
Little endian ppc64 is getting an exciting new ABI.  This is reflected
by the bottom two bits of e_flags in the ELF header:

	0 == legacy binaries (v1 ABI)
	1 == binaries using the old ABI (compiled with a new toolchain)
	2 == binaries using the new ABI.

We store this in a thread flag, because we need to set it in core
dumps and for signal delivery.  Our chief concern is that it doesn't
use function descriptors.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:17 +11:00
Anton Blanchard e844b1eeae pseries: Add H_SET_MODE to change exception endianness
On little endian builds call H_SET_MODE so exceptions have the
correct endianness. We need to reset the endian during kexec
so do that in the MMU hashtable clear callback.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:16 +11:00
Anton Blanchard b91da2d4ce powerpc/pseries: Fix endian issues in pseries EEH code
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-21 09:19:15 +11:00
Linus Torvalds 82023bb7f7 More ACPI and power management updates for 3.13-rc1
- ACPI-based device hotplug fixes for issues introduced recently and
   a fix for an older error code path bug in the ACPI PCI host bridge
   driver.
 
 - Fix for recently broken OMAP cpufreq build from Viresh Kumar.
 
 - Fix for a recent hibernation regression related to s2disk.
 
 - Fix for a locking-related regression in the ACPI EC driver from
   Puneet Kumar.
 
 - System suspend error code path fix related to runtime PM and
   runtime PM documentation update from Ulf Hansson.
 
 - cpufreq's conservative governor fix from Xiaoguang Chen.
 
 - New processor IDs for intel_idle and turbostat and removal of
   an obsolete Kconfig option from Len Brown.
 
 - New device IDs for the ACPI LPSS (Low-Power Subsystem) driver and
   ACPI-based PCI hotplug (ACPIPHP) cleanup from Mika Westerberg.
 
 - Removal of several ACPI video DMI blacklist entries that are not
   necessary any more from Aaron Lu.
 
 - Rework of the ACPI companion representation in struct device and
   code cleanup related to that change from Rafael J Wysocki,
   Lan Tianyu and Jarkko Nikula.
 
 - Fixes for assigning names to ACPI-enumerated I2C and SPI devices
   from Jarkko Nikula.
 
 /
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.19 (GNU/Linux)
 
 iQIcBAABCAAGBQJSjLYNAAoJEILEb/54YlRxkEQP/1pmFWNwSsxLtTHd+PEs0Xbo
 QccqvjQrnw/c8GcmK4eZrz6/xyuepmmjy9kfRKj2ENZniy0NEsSFqkTdSO3vYlva
 8HKWUj7MV3evhFERXAF6Tu0b4Enx4jOP7VMtmYxJo3qrSnKRUcUzc6DGv/ACsUT1
 Nkj0Lhdsg053Z+YzIXrl50w0tCDEMhVmWlMHBtYgr+dMNVnkfPBGkqMblMkKCXT2
 w/yHvauZlxQHtI+8bVqTuGgNN0CPzdlpFGiuUF+5mDf6dRX8zlSn56Ia+Wyw1k9X
 dQp4jYQOgPRo03rNKqQPDiPxUdc7T0RAHRvDB51Ncweuh5PfZGguQe71p6/LKY2W
 i6zblZ0f/vc13hTiMrP+qzKcwZvgPB5DH7SfnHr61JKV7GNFCdYAqoceS5hYMzR9
 d2Fd+txgm763IHWewXfDS/G2cU492R5qr4jpmUIACBQKWDZcqmSRDwRj83t56Ltb
 jgFBMbg4vZxG7IARhind74xsALxdhsgmFjPmx+0qPWjYxcU8otQZpXbgGNI9iOuW
 pxIQv5WPQW0tTmwO4HSuVCOwDPLPz5R0jkev7SvSj3Ek3TeD7He4LmnK055CATiC
 puq+6dp1FISPOPJYk+0DI61qN/CB/qNwRp8LU3ctZwudPVhznIE9FFQ3iN1FdBg2
 X8VDcT9t7VvVuxSBjgkj
 =QMp+
 -----END PGP SIGNATURE-----

Merge tag 'pm+acpi-2-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more ACPI and power management updates from Rafael Wysocki:

 - ACPI-based device hotplug fixes for issues introduced recently and a
   fix for an older error code path bug in the ACPI PCI host bridge
   driver

 - Fix for recently broken OMAP cpufreq build from Viresh Kumar

 - Fix for a recent hibernation regression related to s2disk

 - Fix for a locking-related regression in the ACPI EC driver from
   Puneet Kumar

 - System suspend error code path fix related to runtime PM and runtime
   PM documentation update from Ulf Hansson

 - cpufreq's conservative governor fix from Xiaoguang Chen

 - New processor IDs for intel_idle and turbostat and removal of an
   obsolete Kconfig option from Len Brown

 - New device IDs for the ACPI LPSS (Low-Power Subsystem) driver and
   ACPI-based PCI hotplug (ACPIPHP) cleanup from Mika Westerberg

 - Removal of several ACPI video DMI blacklist entries that are not
   necessary any more from Aaron Lu

 - Rework of the ACPI companion representation in struct device and code
   cleanup related to that change from Rafael J Wysocki, Lan Tianyu and
   Jarkko Nikula

 - Fixes for assigning names to ACPI-enumerated I2C and SPI devices from
   Jarkko Nikula

* tag 'pm+acpi-2-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (24 commits)
  PCI / hotplug / ACPI: Drop unused acpiphp_debug declaration
  ACPI / scan: Set flags.match_driver in acpi_bus_scan_fixed()
  ACPI / PCI root: Clear driver_data before failing enumeration
  ACPI / hotplug: Fix PCI host bridge hot removal
  ACPI / hotplug: Fix acpi_bus_get_device() return value check
  cpufreq: governor: Remove fossil comment in the cpufreq_governor_dbs()
  ACPI / video: clean up DMI table for initial black screen problem
  ACPI / EC: Ensure lock is acquired before accessing ec struct members
  PM / Hibernate: Do not crash kernel in free_basic_memory_bitmaps()
  ACPI / AC: Remove struct acpi_device pointer from struct acpi_ac
  spi: Use stable dev_name for ACPI enumerated SPI slaves
  i2c: Use stable dev_name for ACPI enumerated I2C slaves
  ACPI: Provide acpi_dev_name accessor for struct acpi_device device name
  ACPI / bind: Use (put|get)_device() on ACPI device objects too
  ACPI: Eliminate the DEVICE_ACPI_HANDLE() macro
  ACPI / driver core: Store an ACPI device pointer in struct acpi_dev_node
  cpufreq: OMAP: Fix compilation error 'r & ret undeclared'
  PM / Runtime: Fix error path for prepare
  PM / Runtime: Update documentation around probe|remove|suspend
  cpufreq: conservative: set requested_freq to policy max when it is over policy max
  ...
2013-11-20 13:25:04 -08:00
Linus Torvalds e6d69a60b7 Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dmaengine changes from Vinod Koul:
 "This brings for slave dmaengine:

   - Change dma notification flag to DMA_COMPLETE from DMA_SUCCESS as
     dmaengine can only transfer and not verify validaty of dma
     transfers

   - Bunch of fixes across drivers:

      - cppi41 driver fixes from Daniel

      - 8 channel freescale dma engine support and updated bindings from
        Hongbo

      - msx-dma fixes and cleanup by Markus

   - DMAengine updates from Dan:

      - Bartlomiej and Dan finalized a rework of the dma address unmap
        implementation.

      - In the course of testing 1/ a collection of enhancements to
        dmatest fell out.  Notably basic performance statistics, and
        fixed / enhanced test control through new module parameters
        'run', 'wait', 'noverify', and 'verbose'.  Thanks to Andriy and
        Linus [Walleij] for their review.

      - Testing the raid related corner cases of 1/ triggered bugs in
        the recently added 16-source operation support in the ioatdma
        driver.

      - Some minor fixes / cleanups to mv_xor and ioatdma"

* 'next' of git://git.infradead.org/users/vkoul/slave-dma: (99 commits)
  dma: mv_xor: Fix mis-usage of mmio 'base' and 'high_base' registers
  dma: mv_xor: Remove unneeded NULL address check
  ioat: fix ioat3_irq_reinit
  ioat: kill msix_single_vector support
  raid6test: add new corner case for ioatdma driver
  ioatdma: clean up sed pool kmem_cache
  ioatdma: fix selection of 16 vs 8 source path
  ioatdma: fix sed pool selection
  ioatdma: Fix bug in selftest after removal of DMA_MEMSET.
  dmatest: verbose mode
  dmatest: convert to dmaengine_unmap_data
  dmatest: add a 'wait' parameter
  dmatest: add basic performance metrics
  dmatest: add support for skipping verification and random data setup
  dmatest: use pseudo random numbers
  dmatest: support xor-only, or pq-only channels in tests
  dmatest: restore ability to start test at module load and init
  dmatest: cleanup redundant "dmatest: " prefixes
  dmatest: replace stored results mechanism, with uniform messages
  Revert "dmatest: append verify result to results"
  ...
2013-11-20 13:20:24 -08:00
Linus Torvalds 5a1efc6e68 Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block IO fixes from Jens Axboe:
 "Normally I'd defer my initial for-linus pull request until after the
  merge window, but a race was uncovered in the virtio-blk conversion to
  blk-mq that could cause hangs.  So here's a small collection of fixes
  for you to pull:

   - The fix for the virtio-blk IO hang reported by Dave Chinner, from
     Shaohua and myself.

   - Add the Insert blktrace event for blk-mq.  This makes 'btt' happy
     when it is doing it's state transition analysis.

   - Ensure that blk-mq has disk/partition stats enabled by default,
     instead of making it opt-in.

   - A fix for __bio_add_page() and large sector counts"

* 'for-linus' of git://git.kernel.dk/linux-block:
  blk-mq: add blktrace insert event trace
  virtio-blk: virtqueue_kick() must be ordered with other virtqueue operations
  blk-mq: ensure that we set REQ_IO_STAT so diskstats work
  bio: fix argument of __bio_add_page() for max_sectors > 0xffff
2013-11-20 13:06:20 -08:00
Linus Torvalds 6d6e352c80 md update for 3.13.
Mostly optimisations and obscure bug fixes.
  - raid5 gets less lock contention
  - raid1 gets less contention between normal-io and resync-io
    during resync.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.19 (GNU/Linux)
 
 iQIVAwUAUovzDznsnt1WYoG5AQJ1pQ//bDuXadoJ5dwjWjVxFOKoQ9j/9joEI0yH
 XTApD3ADKckdBc4TSLOIbCNLW1Pbe23HlOI/GjCiJ/7mePL3OwHd7Fx8Rfq3BubV
 f7NgjVwu8nwYD0OXEZsshImptEtrbYwQdy+qlKcHXcZz1MUfR+Egih3r/ouTEfEt
 FNq/6MpyN0IKSY82xP/jFZgesBucgKz/YOUIbwClxm7UiyISKvWQLBIAfLB3dyI3
 HoEdEzQX6I56Rw0mkSUG4Mk+8xx/8twxL+yqEUqfdJREWuB56Km8kl8y/e465Nk0
 ZZg6j/TrslVEwbEeVMx0syvYcaAWFZ4X2jdKfo1lI0g9beZp7H1GRF8yR1s2t/h4
 g/vb55MEN++4LPaE9ut4z7SG2yLyGkZgFTzTjyq5of+DFL0cayO7wXxbgpcD7JYf
 Doef/OSa6csKiGiJI48iQa08Bolmz9ZWzZQXhAthKfFQ9Rv+GEtIAi4kLR8EZPbu
 0/FL1ylYNUY9O7p0g+iy9Kcoc+xW36I95pPZf8pO8GFcXTjyuCCBVh/SNvFZZHPl
 3xk3aZJknAEID8VrVG2IJPkeDI8WK8YxmpU/nARCoytn07Df6Ye8jGvLdR8pL3lB
 TIZV6eRY4yciB8LtoK9Kg4XTmOMhBtjt4c3znkljp98vhOQQb/oHN+BXMGcwqvr9
 fk0KGrg31VA=
 =8RCg
 -----END PGP SIGNATURE-----

Merge tag 'md/3.13' of git://neil.brown.name/md

Pull md update from Neil Brown:
 "Mostly optimisations and obscure bug fixes.
   - raid5 gets less lock contention
   - raid1 gets less contention between normal-io and resync-io during
     resync"

* tag 'md/3.13' of git://neil.brown.name/md:
  md/raid5: Use conf->device_lock protect changing of multi-thread resources.
  md/raid5: Before freeing old multi-thread worker, it should flush them.
  md/raid5: For stripe with R5_ReadNoMerge, we replace REQ_FLUSH with REQ_NOMERGE.
  UAPI: include <asm/byteorder.h> in linux/raid/md_p.h
  raid1: Rewrite the implementation of iobarrier.
  raid1: Add some macros to make code clearly.
  raid1: Replace raise_barrier/lower_barrier with freeze_array/unfreeze_array when reconfiguring the array.
  raid1: Add a field array_frozen to indicate whether raid in freeze state.
  md: Convert use of typedef ctl_table to struct ctl_table
  md/raid5: avoid deadlock when raid5 array has unack badblocks during md_stop_writes.
  md: use MD_RECOVERY_INTR instead of kthread_should_stop in resync thread.
  md: fix some places where mddev_lock return value is not checked.
  raid5: Retry R5_ReadNoMerge flag when hit a read error.
  raid5: relieve lock contention in get_active_stripe()
  raid5: relieve lock contention in get_active_stripe()
  wait: add wait_event_cmd()
  md/raid5.c: add proper locking to error path of raid5_start_reshape.
  md: fix calculation of stacking limits on level change.
  raid5: Use slow_path to release stripe when mddev->thread is null
2013-11-20 13:05:25 -08:00
Ding Tianhong f873042093 bridge: flush br's address entry in fdb when remove the
bridge dev

When the following commands are executed:

brctl addbr br0
ifconfig br0 hw ether <addr>
rmmod bridge

The calltrace will occur:

[  563.312114] device eth1 left promiscuous mode
[  563.312188] br0: port 1(eth1) entered disabled state
[  563.468190] kmem_cache_destroy bridge_fdb_cache: Slab cache still has objects
[  563.468197] CPU: 6 PID: 6982 Comm: rmmod Tainted: G           O 3.12.0-0.7-default+ #9
[  563.468199] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
[  563.468200]  0000000000000880 ffff88010f111e98 ffffffff814d1c92 ffff88010f111eb8
[  563.468204]  ffffffff81148efd ffff88010f111eb8 0000000000000000 ffff88010f111ec8
[  563.468206]  ffffffffa062a270 ffff88010f111ed8 ffffffffa063ac76 ffff88010f111f78
[  563.468209] Call Trace:
[  563.468218]  [<ffffffff814d1c92>] dump_stack+0x6a/0x78
[  563.468234]  [<ffffffff81148efd>] kmem_cache_destroy+0xfd/0x100
[  563.468242]  [<ffffffffa062a270>] br_fdb_fini+0x10/0x20 [bridge]
[  563.468247]  [<ffffffffa063ac76>] br_deinit+0x4e/0x50 [bridge]
[  563.468254]  [<ffffffff810c7dc9>] SyS_delete_module+0x199/0x2b0
[  563.468259]  [<ffffffff814e0922>] system_call_fastpath+0x16/0x1b
[  570.377958] Bridge firewalling registered

--------------------------- cut here -------------------------------

The reason is that when the bridge dev's address is changed, the
br_fdb_change_mac_address() will add new address in fdb, but when
the bridge was removed, the address entry in the fdb did not free,
the bridge_fdb_cache still has objects when destroy the cache, Fix
this by flushing the bridge address entry when removing the bridge.

v2: according to the Toshiaki Makita and Vlad's suggestion, I only
    delete the vlan0 entry, it still have a leak here if the vlan id
    is other number, so I need to call fdb_delete_by_port(br, NULL, 1)
    to flush all entries whose dst is NULL for the bridge.

Suggested-by: Toshiaki Makita <toshiaki.makita1@gmail.com>
Suggested-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-20 15:31:11 -05:00
Vlad Yasevich d2615bf450 net: core: Always propagate flag changes to interfaces
The following commit:
    b6c40d68ff
    net: only invoke dev->change_rx_flags when device is UP

tried to fix a problem with VLAN devices and promiscuouse flag setting.
The issue was that VLAN device was setting a flag on an interface that
was down, thus resulting in bad promiscuity count.
This commit blocked flag propagation to any device that is currently
down.

A later commit:
    deede2fabe
    vlan: Don't propagate flag changes on down interfaces

fixed VLAN code to only propagate flags when the VLAN interface is up,
thus fixing the same issue as above, only localized to VLAN.

The problem we have now is that if we have create a complex stack
involving multiple software devices like bridges, bonds, and vlans,
then it is possible that the flags would not propagate properly to
the physical devices.  A simple examle of the scenario is the
following:

  eth0----> bond0 ----> bridge0 ---> vlan50

If bond0 or eth0 happen to be down at the time bond0 is added to
the bridge, then eth0 will never have promisc mode set which is
currently required for operation as part of the bridge.  As a
result, packets with vlan50 will be dropped by the interface.

The only 2 devices that implement the special flag handling are
VLAN and DSA and they both have required code to prevent incorrect
flag propagation.  As a result we can remove the generic solution
introduced in b6c40d68ff and leave
it to the individual devices to decide whether they will block
flag propagation or not.

Reported-by: Stefan Priebe <s.priebe@profihost.ag>
Suggested-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-20 15:29:56 -05:00
Alexei Starovoitov dcdfdf56b4 ipv4: fix race in concurrent ip_route_input_slow()
CPUs can ask for local route via ip_route_input_noref() concurrently.
if nh_rth_input is not cached yet, CPUs will proceed to allocate
equivalent DSTs on 'lo' and then will try to cache them in nh_rth_input
via rt_cache_route()
Most of the time they succeed, but on occasion the following two lines:
	orig = *p;
	prev = cmpxchg(p, orig, rt);
in rt_cache_route() do race and one of the cpus fails to complete cmpxchg.
But ip_route_input_slow() doesn't check the return code of rt_cache_route(),
so dst is leaking. dst_destroy() is never called and 'lo' device
refcnt doesn't go to zero, which can be seen in the logs as:
	unregister_netdevice: waiting for lo to become free. Usage count = 1
Adding mdelay() between above two lines makes it easily reproducible.
Fix it similar to nh_pcpu_rth_output case.

Fixes: d2d68ba9fe ("ipv4: Cache input routes in fib_info nexthops.")
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-20 15:28:44 -05:00
David S. Miller 4f837c3b11 Merge branch 'r8152'
Hayes Wang says:

====================
r8152 bug fixes

For the patch #3, I add netif_tx_lock() before checking the
netif_queue_stopped(). Besides, I add checking the skb queue
length before waking the tx queue.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-20 15:10:24 -05:00
hayeswang 500b6d7e1e r8152: fix incorrect type in assignment
The data from the hardware should be little endian. Correct the
declaration.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-20 15:09:42 -05:00
hayeswang dd1b119c83 r8152: support stopping/waking tx queue
The maximum packet number which a tx aggregation buffer could contain
is the tx_qlen.

	tx_qlen = buffer size / (packet size + descriptor size).

If the tx buffer is empty and the queued packets are more than the
maximum value which is defined above, stop the tx queue. Wake the
tx queue if tx queue is stopped and the queued packets are less than
tx_qlen.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-20 15:09:42 -05:00
hayeswang 6159878858 r8152: modify the tx flow
Remove the code for sending the packet in the rtl8152_start_xmit().
Let rtl8152_start_xmit() to queue the packet only, and schedule a
tasklet to send the queued packets. This simplify the code and make
sure all the packet would be sent by the original order.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-20 15:09:41 -05:00
hayeswang 7937f9e514 r8152: fix tx/rx memory overflow
The tx/rx would access the memory which is out of the desired range.
Modify the method of checking the end of the memory to avoid it.

For r8152_tx_agg_fill(), the variable remain may become negative.
However, the declaration is unsigned, so the while loop wouldn't
break when reaching the end of the desied memory. Although to change
the declaration from unsigned to signed is enough to fix it, I also
modify the checking method for safe. Replace

		remain = rx_buf_sz - sizeof(*tx_desc) -
			 (u32)((void *)tx_data - agg->head);

with

		remain = rx_buf_sz - (int)(tx_agg_align(tx_data) - agg->head);

to make sure the variable remain is always positive. Then, the
overflow wouldn't happen.

For rx_bottom(), the rx_desc should not be used to calculate the
packet length before making sure the rx_desc is in the desired range.
Change the checking to two parts. First, check the descriptor is in
the memory. The other, using the descriptor to find out the packet
length and check if the packet is in the memory.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-20 15:09:41 -05:00
Nicholas Bellinger d1fa7a1d50 iscsi-target: Expose default_erl as TPG attribute
This patch exposes default_erl as a TPG attribute so that it may be
set TPG wide in demo-mode, but still allow the existing NodeACL
attribute to be overridden on a per initiator basis.

Reported-by: Arshad Hussain <arshad.hussain@calsoftinc.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-11-20 11:57:18 -08:00
Hannes Reinecke b0a382c58e target_core_configfs: split up ALUA supported states
Split up the various ALUA states into individual attributes to
make parsing easier and adhere to the one value per attribute
sysfs principle.

(nab: Convert strict_strtoul -> kstrtoul usage)

Signed-off-by: Hannes Reinecke <hare@suse.de>
2013-11-20 11:38:18 -08:00
Hannes Reinecke 6be526c45d target_core_alua: Make supported states configurable
Signed-off-by: Hannes Reinecke <hare@suse.de>
2013-11-20 11:28:07 -08:00
Hannes Reinecke c0dc941e2b target_core_alua: Store supported ALUA states
The supported ALUA states might be different for individual
devices, so store it in a separate field.

(nab: Remove unnecessary line continuation)

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-11-20 11:26:37 -08:00
Hannes Reinecke 73f3bf51e0 target_core_alua: Rename ALUA_ACCESS_STATE_OPTIMIZED
Rename ALUA_ACCESS_STATE_OPTMIZED to
ALUA_ACCESS_STATE_OPTIMIZED.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-11-20 11:24:57 -08:00
Hannes Reinecke f1ae05d55d target_core_alua: spellcheck
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-11-20 11:24:45 -08:00
Hannes Reinecke 125d0119d1 target core: rename (ex,im)plict -> (ex,im)plicit
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-11-20 11:24:40 -08:00
Yijing Wang 3a4cbc1906 hwmon: (acpi_power_meter) Fix acpi_bus_get_device() return value check
Since acpi_bus_get_device() returns plain int and not acpi_status,
ACPI_FAILURE() should not be used for checking its return value.  Fix
that.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-11-20 08:31:01 -08:00
Takashi Iwai 0fc28fc030 ALSA: hda - Fix unbalanced runtime PM notification at resume
When a codec is resumed, it keeps the power on while the resuming
phase via hda_keep_power_on(), then turns down via
snd_hda_power_down().  At that point, snd_hda_power_down() notifies
the power down to the controller, and this may confuse the refcount if
the codec was already powered up before the resume.

In the end result, the controller goes to runtime suspend even before
the codec is kicked off to the power save, and the communication
stalls happens.

The fix is to add the power-up notification together with
hda_keep_power_on(), and clears the flag appropriately.

Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-11-20 16:39:14 +01:00
Mark Brown 9a5c543dd7 Merge remote-tracking branch 'asoc/fix/wm8962' into asoc-linus 2013-11-20 15:20:38 +00:00
Mark Brown 4b47ab4265 Merge remote-tracking branch 'asoc/fix/rcar' into asoc-linus 2013-11-20 15:20:38 +00:00
Mark Brown cde4d7596c Merge remote-tracking branch 'asoc/fix/fsl' into asoc-linus 2013-11-20 15:20:31 +00:00
Mark Brown 971a6f45e0 Merge remote-tracking branch 'asoc/fix/dma' into asoc-linus 2013-11-20 15:20:31 +00:00
Mark Brown ac5f1ad349 Merge remote-tracking branch 'asoc/fix/cs42l52' into asoc-linus 2013-11-20 15:20:30 +00:00
Mark Brown bdbe9c72f6 Merge remote-tracking branch 'asoc/fix/blackfin' into asoc-linus 2013-11-20 15:20:30 +00:00
Mark Brown c33ef2c9ed Merge remote-tracking branch 'asoc/fix/arizona' into asoc-linus 2013-11-20 15:20:30 +00:00
Mark Brown 8b880f48ee Merge remote-tracking branch 'asoc/fix/ab8500' into asoc-linus 2013-11-20 15:20:24 +00:00
Richard Fitzgerald 3e68ce1bc7 ASoC: arizona: Set FLL to free-run before disabling
The FLL must be placed into free-run mode before disabling
to allow it to entirely shut down.

Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org
2013-11-20 15:20:01 +00:00
Daniel Vetter f727b490ef drm/i915: Fix gen3 self-refresh watermarks
This regression has been introduced in

commit 4fe8590a92
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date:   Wed Sep 4 18:25:22 2013 +0300

    drm/i915: Use adjusted_mode appropriately when computing watermarks

I guess we should renable the enabled local variable into something a
notch more descriptive, but that's something for -next.

The effect on my i945gme netbook is pretty severe amounts of underruns
- usually the very first pixel gets used for the entire screeen.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-11-20 15:52:52 +01:00
David Henningsson 09d2014fb0 ALSA: hda - A casual Dell Headset quirk
You're looking at a casual headset patch,
for a specific hardware it will match,
and suddenly, the headset jack will work,
so please apply this simple quirk!

BugLink: https://bugs.launchpad.net/bugs/1253038
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-11-20 12:59:32 +01:00
Thomas Hellstrom c58f009e01 drm/ttm: Remove set_need_resched from the ttm fault handler
Addresses
"[BUG] completely bonkers use of set_need_resched + VM_FAULT_NOPAGE".

In the first occurence it was used to try to be nice while releasing the
mmap_sem and retrying the fault to work around a locking inversion.
The second occurence was never used.

There has been some discussion whether we should change the locking order to
mmap_sem -> bo_reserve. This patch doesn't address that issue, and leaves
that locking order undefined. The solution that we release the mmap_sem if
tryreserve fails and wait for the buffer to become unreserved is something
we want in any case, and follows how the core vm system waits for pages
to be come unlocked while releasing the mmap_sem.

The code also outlines what needs to be changed if we want to establish the
locking order as mmap_sem -> bo::reserve.

One slight issue that remains with this code is that the fault handler might
be prone to starvation if another thread countinously reserves the buffer.
IMO that usage pattern is highly unlikely.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
2013-11-20 03:46:54 -08:00
Thomas Hellstrom 0bc254257b drm/ttm: Don't move non-existing data
If ttm_bo_move_memcpy was instructed to move a non-populated ttm to
io memory, it would first populate the ttm, then move the data and then
destroy the ttm. That's stupid. However, some drivers might have relied on
this to clear io memory from old stuff. So instead of a NOP, which would
be the most efficient, just clear the destination.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
2013-11-20 03:43:28 -08:00
Sasha Levin 521ee0cfb8 kvm: mmu: delay mmu audit activation
We should not be using jump labels before they were initialized. Push back
the callback to until after jump label initialization.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-11-20 11:12:56 +02:00
Chen Gang e7f2c8c1f0 avr32: uapi: be sure of "_UAPI" prefix for all guard macros
For all uapi headers, need use "_UAPI" prefix for its guard macro
(which will be stripped by "scripts/headers_installer.sh").

Also remove redundant files (bitsperlong.h, errno.h, fcntl.h, ioctl.h,
ioctls.h, ipcbuf.h, kvm_para.h, mman.h, poll.h, resource.h, siginfo.h,
statfs.h, and unistd.h) which are already in Kbuild.

Also be sure that all "#endif" only have one empty line above, and each
file has guard macro.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Hans-Christian Egtvedt <hegtvedt@cisco.com>
2013-11-20 09:53:22 +01:00
Eirik Aanonsen dbc0d691a4 avr32: add kprobe_ctlblk memory struct
This re-enables kprobes on AVR32 architecture.

Signed-off-by: Eirik Aanonsen <eaa@wprmedical.com>
Signed-off-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
2013-11-20 09:53:22 +01:00
Andreas Bießmann d617b338bb avr32: fix out-of-range jump in large kernels
This patch fixes following error (for big kernels):

---8<---
arch/avr32/boot/u-boot/head.o: In function `no_tag_table':
(.init.text+0x44): relocation truncated to fit: R_AVR32_22H_PCREL against symbol `panic' defined in .text.unlikely section in kernel/built-in.o
arch/avr32/kernel/built-in.o: In function `bad_return':
(.ex.text+0x236): relocation truncated to fit: R_AVR32_22H_PCREL against symbol `panic' defined in .text.unlikely section in kernel/built-in.o
--->8---

It comes up when the kernel increases and 'panic()' is too far away to fit in
the +/- 2MiB range. Which in turn issues from the 21-bit displacement in
'br{cond4}' mnemonic which is one of the two ways to do jumps (rjmp has just
10-bit displacement and therefore a way smaller range). This fact was stated
before in 8d29b7b9f8.
One solution to solve this is to add a local storage for the symbol address
and just load the $pc with that value.

Signed-off-by: Andreas Bießmann <andreas@biessmann.de>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: stable@vger.kernel.org
2013-11-20 09:53:21 +01:00
Andreas Bießmann 7a2a74f4b8 avr32: setup crt for early panic()
Before the CRT was (fully) set up in kernel_entry (bss cleared before in
_start, but also not before jump to panic() in no_tag_table case).

This patch fixes this up to have a fully working CRT when branching to panic()
in no_tag_table.

Signed-off-by: Andreas Bießmann <andreas@biessmann.de>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: stable@vger.kernel.org
2013-11-20 09:53:21 +01:00
Randy Dunlap fcd40d69af percpu-refcount: Add percpu-refcount.o to obj-y
Drop percpu_ida.o from lib-y since it is also listed in obj-y
and it doesn't need to be listed in both places.

Move percpu-refcount.o from lib-y to obj-y to fix build errors
in target_core_mod:

ERROR: "percpu_ref_cancel_init" [drivers/target/target_core_mod.ko] undefined!
ERROR: "percpu_ref_kill_and_confirm" [drivers/target/target_core_mod.ko] undefined!
ERROR: "percpu_ref_init" [drivers/target/target_core_mod.ko] undefined!

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-11-19 21:39:21 -08:00
Nicholas Bellinger ea7e32bec1 iscsi-target: Do not reject non-immediate CmdSNs exceeding MaxCmdSN
This patch changes iscsit_sequence_cmd() logic to no longer reject
non-immediate CmdSNs that exceed MaxCmdSN with a protocol error,
but instead silently ignore them.

This is done to correctly follow RFC-3720 Section 3.2.2.1:

   For non-immediate commands, the CmdSN field can take any
   value from ExpCmdSN to MaxCmdSN inclusive.  The target MUST silently
   ignore any non-immediate command outside of this range or non-
   immediate duplicates within the range.

Reported-by: Santosh Kulkarni <santosh.kulkarni@calsoftinc.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-11-19 21:39:21 -08:00
Nicholas Bellinger 04f3b31bff iscsi-target: Convert iscsi_session statistics to atomic_long_t
This patch converts a handful of iscsi_session statistics to type
atomic_long_t, instead of using iscsi_session->session_stats_lock
when incrementing these values.

More importantly, go ahead and drop the spinlock usage within
iscsit_setup_scsi_cmd(), iscsit_check_dataout_hdr(),
iscsit_send_datain(), and iscsit_build_rsp_pdu() fast-path code.

(Squash in Roland's  target: Remove write-only stats fields and lock
from struct se_node_acl)

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-11-19 21:38:52 -08:00