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OpenCloudOS-Kernel
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FUJITA Tomonori f18573abcc block: move the padding adjustment to blk_rq_map_sg 
blk_rq_map_user adjusts bi_size of the last bio. It breaks the rule
that req->data_len (the true data length) is equal to sum(bio). It
broke the scsi command completion code.

commit e97a294ef6 was introduced to fix
the above issue. However, the partial completion code doesn't work
with it. The commit is also a layer violation (scsi mid-layer should
not know about the block layer's padding).

This patch moves the padding adjustment to blk_rq_map_sg (suggested by
James). The padding works like the drain buffer. This patch breaks the
rule that req->data_len is equal to sum(sg), however, the drain buffer
already broke it. So this patch just restores the rule that
req->data_len is equal to sub(bio) without breaking anything new.

Now when a low level driver needs padding, blk_rq_map_user and
blk_rq_map_user_iov guarantee there's enough room for padding.
blk_rq_map_sg can safely extend the last entry of a scatter list.

blk_rq_map_sg must extend the last entry of a scatter list only for a
request that got through bio_copy_user_iov. This patches introduces
new REQ_COPY_USER flag.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Tejun Heo <htejun@gmail.com>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
 		2008-04-21 09:50:08 +02:00
..
acorn/char Fix default compose table initialization 2008-03-03 14:53:16 -08:00
acpi Add down_timeout and change ACPI to use it 2008-04-17 10:42:46 -04:00
amba
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ata Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-04-18 11:25:31 -07:00
atm [ATM] drivers/atm/horizon.c: stop inlining largish static functions 2008-04-13 21:54:34 -07:00
auxdisplay
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base [SCSI] transport_class: BUG if we can't release the attribute container 2008-04-07 12:19:10 -05:00
block loop: manage partitions in disk image 2008-04-21 09:50:08 +02:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-03-12 13:08:09 -07:00
cdrom cdrom: use kmalloced buffers instead of buffers on stack 2008-04-21 09:50:08 +02:00
char Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-kgdb 2008-04-18 08:37:01 -07:00
clocksource
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connector connector: convert to single-threaded workqueue 2008-03-23 21:51:12 -07:00
cpufreq [CPUFREQ] fix section mismatch warnings 2008-03-05 14:45:31 -05:00
cpuidle cpuidle: fix 100% C0 statistics regression 2008-03-26 00:58:19 -04:00
crypto [S390] zcrypt: add support for large random numbers 2008-04-17 07:47:02 +02:00
dca DCA: convert struct class_device to struct device. 2008-02-08 15:33:33 -08:00
dio
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dma dmaengine: ack to flags: make use of the unused bits in the 'ack' field 2008-04-17 13:25:54 -07:00
edac drivers/edac/i3000: document type promotion 2008-02-07 08:42:23 -08:00
eisa
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firewire firewire: cleanups 2008-04-18 17:55:37 +02:00
firmware ipmi: change device node ordering to reflect probe order 2008-04-04 14:46:26 -07:00
gpio gpio/pca953x bugfix: mark as can_sleep 2008-03-10 18:01:19 -07:00
hid HID: update key codes for Apple aluminium 2008-03-18 11:20:33 +01:00
hwmon hwmon: (w83781d) Fix I/O resource conflict with PNP 2008-03-27 08:40:41 -04:00
i2c i2c-tiny-usb: New VID/PID pair 2008-04-11 12:07:05 +02:00
ide cdrom: make unregister_cdrom() return void 2008-04-21 09:50:08 +02:00
ieee1394 ieee1394: limit early node speed to host interface speed 2008-04-18 17:55:31 +02:00
infiniband IB/iser: Don't change itt endianness 2008-04-16 21:09:35 -07:00
input Input: appletouch - add product IDs for the 4th generation MacBooks 2008-04-02 10:14:29 -04:00
isdn [ISDN]: Do not validate ISDN net device address prior to interface-up 2008-04-13 22:44:20 -07:00
leds leds: fix platform driver hotplug/coldplug 2008-04-15 19:35:40 -07:00
lguest misc __user misannotations (pointless casts to long) 2008-03-30 14:20:23 -07:00
macintosh ide: rework PowerMac media-bay support (take 2) 2008-04-18 00:46:23 +02:00
mca
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md md: close a livelock window in handle_parity_checks5 2008-04-11 08:06:44 -07:00
media pvrusb2: fix broken build due to patch order dependency 2008-04-07 19:14:34 -07:00
memstick memstick: suppress uninitialized-var warning 2008-03-28 14:45:23 -07:00
message [SCSI] mpt fusion: fix up msi_enable in mpt_suspend 2008-04-07 12:19:02 -05:00
mfd mfd/asic3: ioread/iowrite take pointer, not unsigned long 2008-03-30 14:20:24 -07:00
misc kgdb: allow static kgdbts boot configuration 2008-04-17 20:05:43 +02:00
mmc mmc: fix platform driver hotplug/coldplug 2008-04-15 19:35:40 -07:00
mtd mtd/chips: add missing set_current_state() to cfi_{amdstd,staa}_sync() 2008-04-08 18:25:53 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.26 2008-04-18 18:02:35 -07:00
nubus
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of [POWERPC] Create and hook up of_platform_device_shutdown 2008-02-06 16:29:59 +11:00
oprofile d_path: Make get_dcookie() use a struct path argument 2008-02-14 21:17:08 -08:00
parisc [PARISC] make ptr_to_pide() static 2008-03-15 19:17:12 -07:00
parport parport_pc: make sure to release IO ports after probing for IT87XX 2008-04-04 14:30:31 -07:00
pci pci: revert SMBus unhide on HP Compaq nx6110 2008-03-28 14:45:22 -07:00
pcmcia pcmcia: fix platform driver hotplug/coldplug 2008-04-15 19:35:40 -07:00
pnp pnpacpi: reduce printk severity for "pnpacpi: exceeded the max number of ..." 2008-03-26 14:22:20 -04:00
power Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2008-02-07 09:45:58 -08:00
ps3 [POWERPC] PS3: Update sys-manager button events 2008-02-14 22:11:01 +11:00
rapidio docbook: fix rapidio source files 2008-03-03 10:47:13 -08:00
rtc rtc: fix the error in the function of cmos_set_alarm 2008-04-15 19:35:40 -07:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.26 2008-04-18 18:02:35 -07:00
sbus
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scsi block: move the padding adjustment to blk_rq_map_sg 2008-04-21 09:50:08 +02:00
serial kgdb: Kconfig fix 2008-04-17 20:05:42 +02:00
sh maple: fix device detection 2008-02-26 14:12:09 +09:00
sn ioc3.c: replace remaining __FUNCTION__ occurrences 2008-03-17 08:11:48 -04:00
spi spi: spi_s3c24xx must initialize num_chipselect 2008-04-15 19:35:41 -07:00
ssb Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-04-17 23:56:30 -07:00
tc
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telephony
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thermal acpi thermal trip points increased to 12 2008-04-15 19:35:41 -07:00
uio UIO: add pgprot_noncached() to UIO mmap code 2008-03-24 22:33:49 -07:00
usb USB: remove broken usb-serial num_endpoints check 2008-04-15 22:30:53 -07:00
video fbdev: fix /proc/fb oops after module removal 2008-04-15 19:35:40 -07:00
virtio virtio: remove overzealous BUG_ON. 2008-04-07 13:14:22 -07:00
w1 ds1wm: report bus reset error 2008-03-04 16:35:12 -08:00
watchdog watchdog: fix platform driver hotplug/coldplug 2008-04-11 08:06:44 -07:00
xen xen: fix grant table bug 2008-04-04 18:36:46 +02:00
zorro
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Kconfig memstick: initial commit for Sony MemoryStick support 2008-02-09 11:08:34 -08:00
Makefile memstick: initial commit for Sony MemoryStick support 2008-02-09 11:08:34 -08:00