The VM layer (on the face of it, fairly reasonably) expected that when
it does a ->writepage() call to the filesystem, it would write out the
full page at that point in time. Especially since it had earlier marked
the whole page dirty with "set_page_dirty()".
But that isn't actually the case: ->writepage() does not actually write
a page, it writes the parts of the page that have been explicitly marked
dirty before, *and* that had not got written out for other reasons since
the last time we told it they were dirty.
That last caveat is the important one.
Which _most_ of the time ends up being the whole page (since we had
called "set_page_dirty()" on the page earlier), but if the filesystem
had done any dirty flushing of its own (for example, to honor some
internal write ordering guarantees), it might end up doing only a
partial page IO (or none at all) when ->writepage() is actually called.
That is the correct thing in general (since we actually often _want_
only the known-dirty parts of the page to be written out), but the
shared dirty page handling had implicitly forgotten about these details,
and had a number of cases where it was doing just the "->writepage()"
part, without telling the low-level filesystem that the whole page might
have been re-dirtied as part of being mapped writably into user space.
Since most of the time the FS did actually write out the full page, we
didn't notice this for a loong time, and this needed some really odd
patterns to trigger. But it caused occasional corruption with rtorrent
and with the Debian "apt" database, because both use shared mmaps to
update the end result.
This fixes it. Finally. After way too much hair-pulling.
Acked-by: Nick Piggin <nickpiggin@yahoo.com.au>
Acked-by: Martin J. Bligh <mbligh@google.com>
Acked-by: Martin Michlmayr <tbm@cyrius.com>
Acked-by: Martin Johansson <martin@fatbob.nu>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Andrei Popa <andrei.popa@i-neo.ro>
Cc: High Dickins <hugh@veritas.com>
Cc: Andrew Morton <akpm@osdl.org>,
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Segher Boessenkool <segher@kernel.crashing.org>
Cc: David Miller <davem@davemloft.net>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Gordon Farquharson <gordonfarquharson@gmail.com>
Cc: Guillaume Chazarain <guichaz@yahoo.fr>
Cc: Theodore Tso <tytso@mit.edu>
Cc: Kenneth Cheng <kenneth.w.chen@intel.com>
Cc: Tobias Diedrich <ranma@tdiedrich.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
The patch allows the ocfs2 heartbeat thread to prioritize I/O which may
help cut down on spurious fencing. Most of this will be in the tools -
we can have a pid configfs attribute and let userspace (ocfs2_hb_ctl)
calls the ioprio_set syscall after starting heartbeat, but only cfq
scheduler supports I/O priorities now.
Signed-off-by: Zhen Wei <zwei@novell.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Mmap-heavy clustered workloads were sometimes finding stale data on mmap
reads. The solution is to call unmap_mapping_range() on any down convert of
a data lock.
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
ocfs2_direct_IO_get_blocks() was incorrectly returning -EIO for a direct I/O
read whose start block was past the end of the file allocation tree. Fix
things so that we return a hole instead. do_direct_IO() will then notice
that the range start is past eof and return a short read.
While there, remove the unused vbo_max variable.
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Copy inline assembly of stsch and add "memory" to clobber list in order
to prevent gcc from optimizing away the checking of the global variable
"pgm_check_occured".
Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Reduce the max. buffer size for the monwriter device to prevent a
possible problem with the z/VM monitor service.
Signed-off-by: Melissa Howland <melissah@us.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
reference to .init.text: from .text between 'cx88_card_setup'
(at offset 0x68c) and 'cx88_risc_field'
Caused by leadtek_eeprom() being declared __devinit and called from
a non-devinit context.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
include/media/ir-common.h:78: error: field 'work' has incomplete type
drivers/media/common/ir-functions.c: In function 'ir_rc5_timer_end':
drivers/media/common/ir-functions.c:301: error: 'jiffies' undeclared (first use in this function)
drivers/media/common/ir-functions.c:301: error: (Each undeclared identifier is reported only once)
drivers/media/common/ir-functions.c:301: error: for each function it appears in.)
drivers/media/common/ir-functions.c:347: error: 'HZ' undeclared (first use in this function)
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
- CAFE_CCIC needs to depend on PCI, else "allyesconfig" breaks
on systems without PCI
- em28xx-video can't udelay(2500) else "allyesconfig" breaks
on systems that refuse to spin that long (I saw it on ARM)
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
ioremap() is called twice to same resource.
The returen value of first one is not error-checked.
second one is complely ignored.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
The return value of kthread_run() should be checked by IS_ERR().
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
The return value of kthread_run() should be checked by IS_ERR().
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Freeing data including list_head in list_for_each() is not safe.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
We shouldn't dereference "cam" when we already know it's NULL.
Spotted by the Coverity checker.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
The temporal filter is forced off when scaling. The VIDIOC_LOG_STATUS
handler still showed the old temporal filter. It is now consistent with
the real temporal filter value.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Change the code to unconditionally turn off the temporal filter when scaling.
If the window is not full screen the filter will introduce a nasty ghosting
effect.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
The wrong matrix was used when an external input was selected instead of
the tuner input. The rxsubchans field was also not initialized to STEREO
for an external input. And finally the msp34xxg_detect_stereo() should
not try to detect stereo for an external input, that code is for the
tuner input only.
Together these bugs made it hit 'n miss whether you ever got stereo out
of the msp3400 for an external input.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
On cx88 driver, sampling rate should be at chroma subcarrier freq (FSC).
However, driver were programming wrong values for PAL/60, PAL/Nc and
NTSC 4.43. This patch do the proper calculation. It also calculates
htotal, hdelay and hactive constants, according with the sampling
rate.
It is tested with PAL/60 by Piotr Maksymuk and Olivier. Also tested with
the already-supported standards.
Test is still required for PAL/Nc.
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
- SYSFS: Replaced all to_video_device(cd), video_device_create_file,
video_device_remove_file and add the proper checks at create_file
- Converted old norm values to V4L2 ones.
- Robustness on sysfs hue/contrast/saturation queries.
Additional check in order to return 0 if the driver is not opened.
- Whitespace cleanups in usbvision-cards.c
This patch merges two fixes by Thierry MERLE and Mauro Chehab, and adds
additional checks.
Signed-off-by: Dwaine Garden<DwaineGarden@rogers.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
dvb_net.c: In function 'dvb_net_ule':
dvb_net.c:628: warning: format '%#lx' expects type 'long unsigned int', but argument 3 has type 'u32'
dvb_net.c:628: warning: format '%#lx' expects type 'long unsigned int', but argument 4 has type 'u32'
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
CRC-32 checking during ULE decapsulation always failed on x86_64 systems due
to the size of a variable used to store CRC. This bug was discovered on
Fedora Core 6 with kernel-2.6.18-1.2849. The i386 counterpart has no such
problem. This patch has been tested on 64-bit system as well as 32-bit system.
Signed-off-by: Ang Way Chuang <wcang@nrg.cs.usm.my>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
- fix decompression buffer allocation not done at first driver open
- simplification of USB sbuf allocation (use of usb_buffer_alloc)
- replaced vmalloc by vmalloc_32 (for homogeneity)
- add of saa7111 (i2cAddr=0x48) detection printout in attach_inform
Signed-off-by: Thierry MERLE <thierry.merle@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Consistent handling of VIDEO_PALETTE_YUYV and VIDEO_PALETTE_YUV422
Signed-off-by: Andrea A Odetti <audetto@tiscali.it>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
i2c_adap is almost not used. This patch removes it, cleaning the i2c support,
and improving driver understanding.
Thanks to Thierry Merle for testing it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This patch contains the following possible cleanups:
- make needlessly global functions static
- remove the unused EXPORT_SYMBOL's
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Both use __SC. Since __* is sort of private namespace I've choosen to fix
this in the driver. For consistency I decieded to also change __UNSC to
UNSC.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This patch removes unnecessary (and misleading) debug
output (it printed the values of the keys in the table up to the value
of the key pressed).
Signed-off-by: Mario Rossi <mariofutire@googlemail.com>
Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
After rewriting the driver the wrong autosearch index was used when
COFDM-parameter needed to be detected.
Thanks to Mario Rossi who found it.
Signed-off-by: Mario Rossi <mariofutire@googlemail.com>
Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Checked in Realtek's driver, this one has no business being there.
The driver still works but there is a noticeable performance drop.
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
This patch removes comment that forcedeth is not supported by NVIDIA.
Signed-Off-By: Ayaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Amit S. Kale <amitkale@netxen.com>
netxen_nic.h | 10 +++++-----
1 files changed, 5 insertions(+), 5 deletions(-)
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Amit S. Kale <amitkale@netxen.com>
netxen_nic_isr.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletion(-)
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Amit S. Kale <amitkale@netxen.com>
netxen_nic_hw.c | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Amit S. Kale <amitkale@netxen.com>
netxen_nic_main.c | 7 +++++++
1 files changed, 7 insertions(+)
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Amit S. Kale <amitkale@netxen.com>
netxen_nic_main.c | 2 ++
1 files changed, 2 insertions(+)
Signed-off-by: Jeff Garzik <jeff@garzik.org>
I have a system with AMCC PowerPC 405EP and PHY Intel LXT971A. Linux
2.6.18.3 is not able to detect the PHY ID correctly. The PHY ID
detected is 0, but should be 0x1d.
This is because phy_read() (__emac_mdio_read() resp.) from
drivers/net/ibm_emac/ibm_emac_core.c might return -ETIMEDOUT or
-EREMOTEIO on error. This is ignored inside the
int mii_phy_probe(struct mii_phy *phy, int address)
from drivers/net/ibm_emac/ibm_emac_phy.c
as the return value is assigned to an u32 variable.
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Small cleanup in the Cirrus Logic EP93xx ethernet driver: Check for NULL
pointer before dereferencing it instead of after. Remove unreferenced
variable.
Signed-off-by: Yan Burman <burman.yan@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
