Commit Graph

188538 Commits

Author SHA1 Message Date
Neil Horman a2f46ee1ba tipc: fix lockdep warning on address assignment
So in the forward porting of various tipc packages, I was constantly
getting this lockdep warning everytime I used tipc-config to set a network
address for the protocol:

[ INFO: possible circular locking dependency detected ]
2.6.33 #1
tipc-config/1326 is trying to acquire lock:
(ref_table_lock){+.-...}, at: [<ffffffffa0315148>] tipc_ref_discard+0x53/0xd4 [tipc]

but task is already holding lock:
(&(&entry->lock)->rlock#2){+.-...}, at: [<ffffffffa03150d5>] tipc_ref_lock+0x43/0x63 [tipc]

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

-> #1 (&(&entry->lock)->rlock#2){+.-...}:
[<ffffffff8107b508>] __lock_acquire+0xb67/0xd0f
[<ffffffff8107b78c>] lock_acquire+0xdc/0x102
[<ffffffff8145471e>] _raw_spin_lock_bh+0x3b/0x6e
[<ffffffffa03152b1>] tipc_ref_acquire+0xe8/0x11b [tipc]
[<ffffffffa031433f>] tipc_createport_raw+0x78/0x1b9 [tipc]
[<ffffffffa031450b>] tipc_createport+0x8b/0x125 [tipc]
[<ffffffffa030f221>] tipc_subscr_start+0xce/0x126 [tipc]
[<ffffffffa0308fb2>] process_signal_queue+0x47/0x7d [tipc]
[<ffffffff81053e0c>] tasklet_action+0x8c/0xf4
[<ffffffff81054bd8>] __do_softirq+0xf8/0x1cd
[<ffffffff8100aadc>] call_softirq+0x1c/0x30
[<ffffffff810549f4>] _local_bh_enable_ip+0xb8/0xd7
[<ffffffff81054a21>] local_bh_enable_ip+0xe/0x10
[<ffffffff81454d31>] _raw_spin_unlock_bh+0x34/0x39
[<ffffffffa0308eb8>] spin_unlock_bh.clone.0+0x15/0x17 [tipc]
[<ffffffffa0308f47>] tipc_k_signal+0x8d/0xb1 [tipc]
[<ffffffffa0308dd9>] tipc_core_start+0x8a/0xad [tipc]
[<ffffffffa01b1087>] 0xffffffffa01b1087
[<ffffffff8100207d>] do_one_initcall+0x72/0x18a
[<ffffffff810872fb>] sys_init_module+0xd8/0x23a
[<ffffffff81009b42>] system_call_fastpath+0x16/0x1b

-> #0 (ref_table_lock){+.-...}:
[<ffffffff8107b3b2>] __lock_acquire+0xa11/0xd0f
[<ffffffff8107b78c>] lock_acquire+0xdc/0x102
[<ffffffff81454836>] _raw_write_lock_bh+0x3b/0x6e
[<ffffffffa0315148>] tipc_ref_discard+0x53/0xd4 [tipc]
[<ffffffffa03141ee>] tipc_deleteport+0x40/0x119 [tipc]
[<ffffffffa0316e35>] release+0xeb/0x137 [tipc]
[<ffffffff8139dbf4>] sock_release+0x1f/0x6f
[<ffffffff8139dc6b>] sock_close+0x27/0x2b
[<ffffffff811116f6>] __fput+0x12a/0x1df
[<ffffffff811117c5>] fput+0x1a/0x1c
[<ffffffff8110e49b>] filp_close+0x68/0x72
[<ffffffff8110e552>] sys_close+0xad/0xe7
[<ffffffff81009b42>] system_call_fastpath+0x16/0x1b

Finally decided I should fix this.  Its a straightforward inversion,
tipc_ref_acquire takes two locks in this order:
ref_table_lock
entry->lock

while tipc_deleteport takes them in this order:
entry->lock (via tipc_port_lock())
ref_table_lock (via tipc_ref_discard())

when the same entry is referenced, we get the above warning.  The fix is equally
straightforward.  Theres no real relation between the entry->lock and the
ref_table_lock (they just are needed at the same time), so move the entry->lock
aquisition in tipc_ref_acquire down, after we unlock ref_table_lock (this is
safe since the ref_table_lock guards changes to the reference table, and we've
already claimed a slot there.  I've tested the below fix and confirmed that it
clears up the lockdep issue

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-16 14:15:45 -07:00
James Chapman c3259c8a70 l2tp: Fix UDP socket reference count bugs in the pppol2tp driver
This patch fixes UDP socket refcnt bugs in the pppol2tp driver.

A bug can cause a kernel stack trace when a tunnel socket is closed.

A way to reproduce the issue is to prepare the UDP socket for L2TP (by
opening a tunnel pppol2tp socket) and then close it before any L2TP
sessions are added to it. The sequence is

Create UDP socket
Create tunnel pppol2tp socket to prepare UDP socket for L2TP
  pppol2tp_connect: session_id=0, peer_session_id=0
L2TP SCCRP control frame received (tunnel_id==0)
  pppol2tp_recv_core: sock_hold()
  pppol2tp_recv_core: sock_put
L2TP ZLB control frame received (tunnel_id=nnn)
  pppol2tp_recv_core: sock_hold()
  pppol2tp_recv_core: sock_put
Close tunnel management socket
  pppol2tp_release: session_id=0, peer_session_id=0
Close UDP socket
  udp_lib_close: BUG

The addition of sock_hold() in pppol2tp_connect() solves the problem.

For data frames, two sock_put() calls were added to plug a refcnt leak
per received data frame. The ref that is grabbed at the top of
pppol2tp_recv_core() must always be released, but this wasn't done for
accepted data frames or data frames discarded because of bad UDP
checksums. This leak meant that any UDP socket that had passed L2TP
data traffic (i.e. L2TP data frames, not just L2TP control frames)
using pppol2tp would not be released by the kernel.

WARNING: at include/net/sock.h:435 udp_lib_unhash+0x117/0x120()
Pid: 1086, comm: openl2tpd Not tainted 2.6.33-rc1 #8
Call Trace:
 [<c119e9b7>] ? udp_lib_unhash+0x117/0x120
 [<c101b871>] ? warn_slowpath_common+0x71/0xd0
 [<c119e9b7>] ? udp_lib_unhash+0x117/0x120
 [<c101b8e3>] ? warn_slowpath_null+0x13/0x20
 [<c119e9b7>] ? udp_lib_unhash+0x117/0x120
 [<c11598a7>] ? sk_common_release+0x17/0x90
 [<c11a5e33>] ? inet_release+0x33/0x60
 [<c11577b0>] ? sock_release+0x10/0x60
 [<c115780f>] ? sock_close+0xf/0x30
 [<c106e542>] ? __fput+0x52/0x150
 [<c106b68e>] ? filp_close+0x3e/0x70
 [<c101d2e2>] ? put_files_struct+0x62/0xb0
 [<c101eaf7>] ? do_exit+0x5e7/0x650
 [<c1081623>] ? mntput_no_expire+0x13/0x70
 [<c106b68e>] ? filp_close+0x3e/0x70
 [<c101eb8a>] ? do_group_exit+0x2a/0x70
 [<c101ebe1>] ? sys_exit_group+0x11/0x20
 [<c10029b0>] ? sysenter_do_call+0x12/0x26

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-16 14:15:44 -07:00
Steve Glendinning db443c441e smsc95xx: wait for PHY to complete reset during init
This patch ensures the PHY correctly completes its reset before
setting register values.

Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-16 14:15:44 -07:00
James Chapman 3feec9095d l2tp: Fix oops in pppol2tp_xmit
When transmitting L2TP frames, we derive the outgoing interface's UDP
checksum hardware assist capabilities from the tunnel dst dev. This
can sometimes be NULL, especially when routing protocols are used and
routing changes occur. This patch just checks for NULL dst or dev
pointers when checking for netdev hardware assist features.

BUG: unable to handle kernel NULL pointer dereference at 0000000c
IP: [<f89d074c>] pppol2tp_xmit+0x341/0x4da [pppol2tp]
*pde = 00000000
Oops: 0000 [#1] SMP
last sysfs file: /sys/class/net/lo/operstate
Modules linked in: pppol2tp pppox ppp_generic slhc ipv6 dummy loop snd_hda_codec_atihdmi snd_hda_intel snd_hda_codec snd_pcm snd_timer snd soundcore snd_page_alloc evdev psmouse serio_raw processor button i2c_piix4 i2c_core ati_agp agpgart pcspkr ext3 jbd mbcache sd_mod ide_pci_generic atiixp ide_core ahci ata_generic floppy ehci_hcd ohci_hcd libata e1000e scsi_mod usbcore nls_base thermal fan thermal_sys [last unloaded: scsi_wait_scan]

Pid: 0, comm: swapper Not tainted (2.6.32.8 #1)
EIP: 0060:[<f89d074c>] EFLAGS: 00010297 CPU: 3
EIP is at pppol2tp_xmit+0x341/0x4da [pppol2tp]
EAX: 00000000 EBX: f64d1680 ECX: 000005b9 EDX: 00000000
ESI: f6b91850 EDI: f64d16ac EBP: f6a0c4c0 ESP: f70a9cac
 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Process swapper (pid: 0, ti=f70a8000 task=f70a31c0 task.ti=f70a8000)
Stack:
 000005a9 000005b9 f734c400 f66652c0 f7352e00 f67dc800 00000000 f6b91800
<0> 000005a3 f70ef6c4 f67dcda9 000005a3 f89b192e 00000246 000005a3 f64d1680
<0> f63633e0 f6363320 f64d1680 f65a7320 f65a7364 f65856c0 f64d1680 f679f02f
Call Trace:
 [<f89b192e>] ? ppp_push+0x459/0x50e [ppp_generic]
 [<f89b217f>] ? ppp_xmit_process+0x3b6/0x430 [ppp_generic]
 [<f89b2306>] ? ppp_start_xmit+0x10d/0x120 [ppp_generic]
 [<c11c15cb>] ? dev_hard_start_xmit+0x21f/0x2b2
 [<c11d0947>] ? sch_direct_xmit+0x48/0x10e
 [<c11c19a0>] ? dev_queue_xmit+0x263/0x3a6
 [<c11e2a9f>] ? ip_finish_output+0x1f7/0x221
 [<c11df682>] ? ip_forward_finish+0x2e/0x30
 [<c11de645>] ? ip_rcv_finish+0x295/0x2a9
 [<c11c0b19>] ? netif_receive_skb+0x3e9/0x404
 [<f814b791>] ? e1000_clean_rx_irq+0x253/0x2fc [e1000e]
 [<f814cb7a>] ? e1000_clean+0x63/0x1fc [e1000e]
 [<c1047eff>] ? sched_clock_local+0x15/0x11b
 [<c11c1095>] ? net_rx_action+0x96/0x195
 [<c1035750>] ? __do_softirq+0xaa/0x151
 [<c1035828>] ? do_softirq+0x31/0x3c
 [<c10358fe>] ? irq_exit+0x26/0x58
 [<c1004b21>] ? do_IRQ+0x78/0x89
 [<c1003729>] ? common_interrupt+0x29/0x30
 [<c101ac28>] ? native_safe_halt+0x2/0x3
 [<c1008c54>] ? default_idle+0x55/0x75
 [<c1009045>] ? c1e_idle+0xd2/0xd5
 [<c100233c>] ? cpu_idle+0x46/0x62
Code: 8d 45 08 f0 ff 45 08 89 6b 08 c7 43 68 7e fb 9c f8 8a 45 24 83 e0 0c 3c 04 75 09 80 63 64 f3 e9 b4 00 00 00 8b 43 18 8b 4c 24 04 <8b> 40 0c 8d 79 11 f6 40 44 0e 8a 43 64 75 51 6a 00 8b 4c 24 08
EIP: [<f89d074c>] pppol2tp_xmit+0x341/0x4da [pppol2tp] SS:ESP 0068:f70a9cac
CR2: 000000000000000c

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-16 14:15:43 -07:00
Steve Glendinning d0cad87170 smsc75xx: SMSC LAN75xx USB gigabit ethernet adapter driver
This patch adds a driver for SMSC's LAN7500 family of USB 2.0
to gigabit ethernet adapters.  It's loosely based on the smsc95xx
driver but the device registers for LAN7500 are completely different.

Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-16 14:15:42 -07:00
Atsushi Nemoto c5e49fb518 ne: Do not use slashes in irq name string
This patch fixes following warning introduced by commit
12bac0d9f4 ("proc: warn on non-existing
proc entries"):

WARNING: at /work/mips-linux/make/linux/fs/proc/generic.c:316 __xlate_proc_name+0xe0/0xe8()
name 'RBHMA4X00/RTL8019'

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-16 14:15:42 -07:00
Jiri Slaby edee39321b NET: ksz884x, fix lock imbalance
Stanse found that one error path (when alloc_skb fails) in netdev_tx
omits to unlock hw_priv->hwlock. Fix that.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Tristram Ha <Tristram.Ha@micrel.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-16 14:15:41 -07:00
Tilman Schmidt 6ad34145cf gigaset: correct range checking off by one error
Correct a potential array overrun due to an off by one error in the
range check on the CAPI CONNECT_REQ CIPValue parameter.
Found and reported by Dan Carpenter using smatch.

Impact: bugfix
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-16 14:15:41 -07:00
Dave Chinner e8c3753ce4 xfs: don't warn about page discards on shutdown
If we are doing a forced shutdown, we can get lots of noise about
delalloc pages being discarded. This is happens by design during a
forced shutdown, so don't spam the logs with these messages.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
2010-03-16 15:40:53 -05:00
Alex Elder 8a262e573d xfs: use scalable vmap API
Re-apply a commit that had been reverted due to regressions
that have since been fixed.

    From 95f8e302c0 Mon Sep 17 00:00:00 2001
    From: Nick Piggin <npiggin@suse.de>
    Date: Tue, 6 Jan 2009 14:43:09 +1100

    Implement XFS's large buffer support with the new vmap APIs. See the vmap
    rewrite (db64fe02) for some numbers. The biggest improvement that comes from
    using the new APIs is avoiding the global KVA allocation lock on every call.

    Signed-off-by: Nick Piggin <npiggin@suse.de>
    Reviewed-by: Christoph Hellwig <hch@infradead.org>
    Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

Only modifications here were a minor reformat, plus making the patch
apply given the new use of xfs_buf_is_vmapped().

Modified-by: Alex Elder <aelder@sgi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
2010-03-16 15:40:36 -05:00
Alex Elder cd9640a70d xfs: remove old vmap cache
Re-apply a commit that had been reverted due to regressions
that have since been fixed.

    Original commit: d2859751cd
    Author: Nick Piggin <npiggin@suse.de>
    Date: Tue, 6 Jan 2009 14:40:44 +1100

    XFS's vmap batching simply defers a number (up to 64) of vunmaps,
    and keeps track of them in a list. To purge the batch, it just goes
    through the list and calls vunamp on each one. This is pretty poor:
    a global TLB flush is generally still performed on each vunmap, with
    the most expensive parts of the operation being the broadcast IPIs
    and locking involved in the SMP callouts, and the locking involved
    in the vmap management -- none of these are avoided by just batching
    up the calls. I'm actually surprised it ever made much difference.
    (Now that the lazy vmap allocator is upstream, this description is
    not quite right, but the vunmap batching still doesn't seem to do
    much).

    Rip all this logic out of XFS completely. I will improve vmap
    performance and scalability directly in subsequent patch.

    Signed-off-by: Nick Piggin <npiggin@suse.de>
    Reviewed-by: Christoph Hellwig <hch@infradead.org>
    Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

The only change I made was to use the "new" xfs_buf_is_vmapped()
function in a place it had been open-coded in the original.

Modified-by: Alex Elder <aelder@sgi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
2010-03-16 15:40:19 -05:00
Florian Fainelli 14b5d6dd40 leds: Fix race between LED device uevent and actual attributes creation
If we were to dynamically register/unregister leds and have udev or other
daemons handle the leds class uevents, we would be notified of the adding of a
new LED and if the daemon immediately tries to open one of the attributes of
the led device, it would fail with a "no such file or directory" error since
this the attributes are not yet created. Fix this by switching attributes to be
class-wide, such that the driver core will register these attributes with
device_add_attrs and then emit the kobject_uevent ADD signal.

Signed-off-by:  Fainelli <ffainelli@freebox.fr>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 20:27:25 +00:00
Bruno Prémont ec57af9c2e backlight: panasonic-laptop - Fix incomplete registration failure handling
Properly return backlight registration error to parent.
Mark struct backlight_ops as const.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Acked-by: Harald Welte <laforge@gnumonks.org> (registration failure)
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 20:13:31 +00:00
Bruno Prémont 28d85873cd backlight: msi-laptop, msi-wmi: fix incomplete registration failure handling
Properly return backlight registration error to parent.
Mark struct backlight_ops as const.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Reviewed-by: Anisse Astier <anisse@astier.eu>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 20:12:11 +00:00
Bruno Prémont fa11de0a33 backlight: blackfin - Fix missing registration failure handling
Check newly registered backlight_device for error and properly
return error to parent
Mark struct backlight_ops as const.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Acked-by: Mike Frysinger <vapier@gentoo.org> (constify struct backlight_ops)
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 20:10:17 +00:00
Bruno Prémont f0af789913 backlight: classmate-laptop - Fix missing registration failure handling
Check newly registered backlight_device for error and properly
return error to parent.
Mark struct backlight_ops as const.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 20:04:07 +00:00
Evan McClain 36bc5ee6a8 backlight: mbp_nvidia_bl - add five more MacBook variants
This adds the MacBook 1,1 2,1 3,1 4,1 and 4,2 to the DMI tables.

Signed-off-by: Evan McClain <evan.mcclain@gatech.edu>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 19:56:08 +00:00
Anton Vorontsov 0493a4ff10 leds-gpio: fix default state handling on OF platforms
The driver wrongly sets default state for LEDs that don't specify
default-state property.

Currently the driver handles default state this way:

memset(&led, 0, sizeof(led));
for_each_child_of_node(np, child) {
	state = of_get_property(child, "default-state", NULL);
	if (state) {
		if (!strcmp(state, "keep"))
			led.default_state = LEDS_GPIO_DEFSTATE_KEEP;
		...
	}
	ret = create_gpio_led(&led, ...);
}

Which means that all LEDs that do not specify default-state will inherit
the last value of the default-state property, which is wrong.

This patch fixes the issue by moving LED's template initialization into
the loop body.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 19:53:19 +00:00
Bob Rodgers 72dcd8d08a leds: Add Dell Business Class Netbook LED driver
This patch adds an LED driver to support the Dell Activity LED on the
Dell Latitude 2100 netbook and future products to come. The Activity LED
is visible externally in the lid so classroom instructors can observe it
from a distance. The driver uses the sysfs led_class and provides a
standard LED interface.

Signed-off by: Bob Rodgers <Robert_Rodgers@dell.com>
Signed-off-by: Louis Davis <Louis_Davis@dell.com>
Signed-off-by: Jim Dailey <Jim_Dailey@dell.com>, Developers
Acked-by: Matthew Garrett <mjg@redhat.com>
Acked-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 19:49:21 +00:00
H Hartley Sweeten d09e16664b leds: Kconfig cleanup
Remove the need for "depends on LEDS_CLASS" by wrapping the affected
config options in an if/endif block. Similar for "depends on LEDS_TRIGGERS".

LEDS_COBALT_RAQ still has a "depends on LEDS_CLASS=y" since it cannot
be selected to build as a module.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 19:49:21 +00:00
H Hartley Sweeten bb9b6ef70f leds: led-class.c - Quiet boot messages
As each led device gets registered a kernel message gets printed. In
an embedded system with a number of leds this can produce a lot
of output that just looks like noise.

Change the message type to KERN_DEBUG since it might be useful
in the dmesg output "after" booting.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 19:49:21 +00:00
Márton Németh 5e89a3484d leds: make PCI device id constant
The id_table field of the struct pci_driver is constant in <linux/pci.h>
so it is worth to make pci_device_id also constant.

The semantic match that finds this kind of pattern is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r@
disable decl_init,const_decl_init;
identifier I1, I2, x;
@@
	struct I1 {
	  ...
	  const struct I2 *x;
	  ...
	};
@s@
identifier r.I1, y;
identifier r.x, E;
@@
	struct I1 y = {
	  .x = E,
	};
@c@
identifier r.I2;
identifier s.E;
@@
	const struct I2 E[] = ... ;
@depends on !c@
identifier r.I2;
identifier s.E;
@@
+	const
	struct I2 E[] = ...;
// </smpl>

Signed-off-by: Márton Németh <nm127@freemail.hu>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 19:49:21 +00:00
Daniel Mack 9360340262 leds: ALIX2: Add dependency to !GPIO_CS5335
The ALIX2 LED driver and the CS5535 GPIO drivers share the same I/O
range which causes a conflict if they're both enabled. Fix this for now
by adding Kconfig dependencies. While at it, also drop the EXPERIMENTAL
flag, as the code has been around for awhile already.

Note that this is a hack. At some point, a real platform support for
this board should be added which handles the LEDs via the leds-gpio
driver.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 19:49:20 +00:00
Matthew Garrett a19a6ee6ca backlight: Allow properties to be passed at registration
Values such as max_brightness should be set before backlights are
registered, but the current API doesn't allow that. Add a parameter to
backlight_device_register and update drivers to ensure that they
set this correctly.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 19:47:54 +00:00
Bruno Prémont 57e148b6a9 backlight: Add backlight_device parameter to check_fb
check_fb from backlight_ops lacks a reference to the backlight_device
that's being referred to. Add this parameter so a backlight_device
can be mapped to a single framebuffer, especially if the same driver
handles multiple devices on a single system.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 19:47:54 +00:00
Jiri Slaby a4ebb780e1 video: backlight/progear, fix pci device refcounting
Stanse found an ommitted pci_dev_puts on error path in progearbl_probe.
pmu_dev and sb_dev are gotten, but never put when
backlight_device_register fails.

So unify fail paths and put the devs when the failure occurs.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 19:47:54 +00:00
Alberto Panizzo c3cf2e44d3 backlight: l4f00242t03: Fix module licence absence.
Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 19:47:53 +00:00
Richard Purdie b4144e4f6e backlight: Revert some const qualifiers
9905a43b2d went a little to far with const
qualifiers as there are legitiment cases where the function pointers
can change (machine specific setup code for example).

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 19:47:53 +00:00
Alberto Panizzo e7fb9c4ad3 backlight: Add Epson L4F00242T03 LCD driver
The Epson LCD L4F00242T03 is mounted on the Freescale i.MX31 PDK board. 
Based upon Marek Vasut work in l4f00242t03.c, this driver provides
basic init and power on/off functionality for this device through the
sysfs lcd interface.

Unfortunately Datasheet for this device are not available and
all the control sequences sent to the display were copied from the
freescale driver that in the i.MX31 Linux BSP.

As in the i.MX31PDK board the core and io suppliers are voltage
regulators, that functionality is embedded here, but not strict.

Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
2010-03-16 19:47:53 +00:00
Chris Mason 7fde62bffb Btrfs: buffer results in the space_info ioctl
The space_info ioctl was using copy_to_user inside rcu_read_lock.  This
commit changes things to copy into a buffer first and then dump the
result down to userland.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-03-16 15:40:10 -04:00
Sage Weil ce769a2904 Btrfs: use __u64 types in ioctl.h
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-03-16 14:24:27 -04:00
Sage Weil 854d2c3531 Btrfs: fix search_ioctl key advance
key->type is u8, not u64.

fs/btrfs/ioctl.c: In function 'copy_to_sk':
fs/btrfs/ioctl.c:1024: warning: comparison is always true due to limited range of data type

Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-03-16 14:24:27 -04:00
Jiri Slaby 4e06e240dc PCMCIA: resource, fix lock imbalance
Stanse found that one error path (when alloc_skb fails) in netdev_tx
omits to unlock hw_priv->hwlock. Fix that by moving away from unlock in
each fail path. Unlock at one place instead.

Introduced in 94a819f802
(pcmcia: assert locking to struct pcmcia_device)

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
2010-03-16 17:54:58 +01:00
Bruno Prémont e639ba481b HID: avoid '\0' in hid debugfs events file
When dumping /sys/kernel/debug/hid/$device/events '\0' characters show up
(invisible if cat to console but shown by less or while looking at a dump
 file).  These are due to hid_debug_event() adding strlen()+1 bytes to the ring
buffer (e.g. including the trailing '\0').  Any roll-over causes a '\0' as well
as hid_debug_event() handles the ring buffers with HID_DEBUG_BUFSIZE-1 size
while hid_debug_events_read() handles it with full HID_DEBUG_BUFSIZE size.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-03-16 13:36:01 +01:00
David S. Miller 6404fccafa MAINTAINERS: Add entry for sparc serial drivers.
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-16 01:00:17 -07:00
Julia Lawall 935050daad drivers/serial/sunsab.c: adjust the constant used to initialize the interrupt_mask0 fields
From: Julia Lawall <julia@diku.dk>

SAB82532_ISR0_TCD is declared in drivers/serial/subsab.h as relating to a
status register, while SAB82532_IMR0_TCD is declared in the same file as
relating to a mask register.  The latter seems more appropriate for the
interrupt_mask0 field, and follows the strategy for initializing this field
elsewhere in the same file.

Both SAB82532_ISR0_TCD and SAB82532_IMR0_TCD have the same value.

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-16 00:33:37 -07:00
Michael Braun 7f7708f005 bridge: Fix br_forward crash in promiscuous mode
From: Michael Braun <michael-dev@fami-braun.de>

bridge: Fix br_forward crash in promiscuous mode

It's a linux-next kernel from 2010-03-12 on an x86 system and it
OOPs in the bridge module in br_pass_frame_up (called by
br_handle_frame_finish) because brdev cannot be dereferenced (its set to
a non-null value).

Adding some BUG_ON statements revealed that
 BR_INPUT_SKB_CB(skb)->brdev == br-dev
(as set in br_handle_frame_finish first)
only holds until br_forward is called.
The next call to br_pass_frame_up then fails.

Digging deeper it seems that br_forward either frees the skb or passes
it to NF_HOOK which will in turn take care of freeing the skb. The
same is holds for br_pass_frame_ip. So it seems as if two independent
skb allocations are required. As far as I can see, commit
b33084be19 ("bridge: Avoid unnecessary
clone on forward path") removed skb duplication and so likely causes
this crash. This crash does not happen on 2.6.33.

I've therefore modified br_forward the same way br_flood has been
modified so that the skb is not freed if skb0 is going to be used
and I can confirm that the attached patch resolves the issue for me.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-16 00:26:22 -07:00
Dan Carpenter fb40b496ad sound: sequencer: clean up remove bogus check
A few lines earlier bend is limited to 2399.  So semitones is always
less than 24 here.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-03-16 07:52:13 +01:00
Takashi Iwai a9104f9899 Merge branch 'topic/misc' into fix/misc 2010-03-16 07:50:49 +01:00
Daniel T Chen 572c0e3c73 ALSA: hda: Use LPIB and 6stack-dig for eMachines T5212
BugLink: https://bugs.launchpad.net/bugs/538895

The OR has verified that both position_fix=1 and model=6stack-dig are
necessary to have capture function properly. (The existing 3stack-6ch
model quirk seems to be incorrect.)

Reported-by: Reuben Bailey <reuben.e.bailey@gmail.com>
Tested-by: Reuben Bailey <reuben.e.bailey@gmail.com>
Cc: <stable@kernel.org>
Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-03-16 07:46:31 +01:00
NeilBrown 627a2d3c29 md: deal with merge_bvec_fn in component devices better.
If a component device has a merge_bvec_fn then as we never call it
we must ensure we never need to.  Currently this is done by setting
max_sector to 1 PAGE, however this does not stop a bio being created
with several sub-page iovecs that would violate the merge_bvec_fn.

So instead set max_segments to 1 and set the segment boundary to the
same as a page boundary to ensure there is only ever one single-page
segment of IO requested at a time.

This can particularly be an issue when 'xen' is used as it is
known to submit multiple small buffers in a single bio.

Signed-off-by: NeilBrown <neilb@suse.de>
Cc: stable@kernel.org
2010-03-16 17:04:24 +11:00
Herbert Xu 0821ec55bb bridge: Move NULL mdb check into br_mdb_ip_get
Since all callers of br_mdb_ip_get need to check whether the
hash table is NULL, this patch moves the check into the function.

This fixes the two callers (query/leave handler) that didn't
check it.

Reported-by: Michael Braun <michael-dev@fami-braun.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-15 20:38:25 -07:00
Lars Ellenberg d00561a2f6 ISDN: Add PCI ID for HFC-2S/4S Beronet Card PCIe
A few subdevice IDs seem to have been dropped when hfc_multi was
included upstream, just compare the list at
http://www.openvox.cn/viewvc/misdn/trunk/hfc_multi.c?revision=75&view=annotate#l175
with the IDs in drivers/isdn/hardware/mISDN/hfcmulti.c

Added PCIe 2 Port card and LED settings (same as PCI)
Do not use <linux/pci_ids.h> /KKe

Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-15 19:09:28 -07:00
David S. Miller 4961e02f19 Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2010-03-15 16:23:54 -07:00
Ben Dooks 0e17226f7c ARM: SAMSUNG: Fixup commit 4e6d488af3
Commit 4e6d488af3 either missed out the
following machine files or somehow managed to clash between merges.

Fixup the three files missing the second parameter to addruart macro
to allow them to build.

Fixes the following warnings in arch/arm/kernel/debug.c:
arch/arm/kernel/debug.S: Assembler messages:
arch/arm/kernel/debug.S:167: Error: too many positional arguments
arch/arm/kernel/debug.S:183: Error: too many positional arguments

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-03-15 23:11:41 +00:00
Gerrit Renker d14a0ebda7 net-2.6 [Bug-Fix][dccp]: fix oops caused after failed initialisation
dccp: fix panic caused by failed initialisation

This fixes a kernel panic reported thanks to Andre Noll:

if DCCP is compiled into the kernel and any out of the initialisation
steps in net/dccp/proto.c:dccp_init() fail, a subsequent attempt to create
a SOCK_DCCP socket will panic, since inet{,6}_create() are not prevented
from creating DCCP sockets.

This patch fixes the problem by propagating a failure in dccp_init() to
dccp_v{4,6}_init_net(), and from there to dccp_v{4,6}_init(), so that the
DCCP protocol is not made available if its initialisation fails.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-15 16:00:50 -07:00
Dan Carpenter b8d6897431 myri: remove dead code
We can never reach the return statement.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-15 16:00:50 -07:00
Tilman Schmidt 873a69a358 gigaset: prune use of tty_buffer_request_room
Calling tty_buffer_request_room() before tty_insert_flip_string()
is unnecessary, costs CPU and for big buffers can mess up the
multi-page allocation avoidance.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Acked-by: Karsten Keil <keil@b1-systems.de>
CC: Alan Cox <alan@lxorguk.ukuu.org.uk>, stable@kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-15 16:00:49 -07:00
Tilman Schmidt 3a0a3a6b92 gigaset: correct clearing of at_state strings on RING
In RING handling, clear the table of received parameter strings in
a loop like everywhere else, instead of by enumeration which had
already gotten out of sync.

Impact: minor bugfix
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Acked-by: Karsten Keil <keil@b1-systems.de>
CC: stable@kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-15 16:00:49 -07:00
Tilman Schmidt bc35b4e347 gigaset: avoid registering CAPI driver more than once
Registering/unregistering the Gigaset CAPI driver when a device is
connected/disconnected causes an Oops when disconnecting two Gigaset
devices in a row, because the same capi_driver structure gets
unregistered twice. Fix by making driver registration/unregistration
a separate operation (empty in the ISDN4Linux case) called when the
main module is loaded/unloaded.

Impact: bugfix
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Acked-by: Karsten Keil <keil@b1-systems.de>
CC: stable@kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-15 16:00:49 -07:00