OK, that's probably the easiest way to do that, as much as I don't like it...
Since iget() et.al. will not accept I_FREEING (will wait to go away
and restart), and since we'd better have serialization between new/free
on fs data structures anyway, we can afford simply skipping I_FREEING
et.al. in insert_inode_locked().
We do that from new_inode, so it won't race with free_inode in any interesting
ways and it won't race with iget (of any origin; nfsd or in case of fs
corruption a lookup) since both still will wait for I_LOCK.
Reviewed-by: "Theodore Ts'o" <tytso@mit.edu>
Acked-by: Jan Kara <jack@suse.cz>
Tested-by: David Watson <dbwatson@ukfsn.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
The nobh_truncate_page() function is used by ext2, exofs, and jfs. Of
these three, only ext2 and jfs's get_block() function pays attention
to bh->b_size --- which is normally always the filesystem blocksize
except when the get_block() function is called by either
mpage_readpage(), mpage_readpages(), or the direct I/O routines in
fs/direct_io.c.
Unfortunately, nobh_truncate_page() does not initialize map_bh before
calling the filesystem-supplied get_block() function. So ext2 and jfs
will try to calculate the number of blocks to map by taking stack
garbage and shifting it left by inode->i_blkbits. This should be
*mostly* harmless (except the filesystem will do some unnneeded work)
unless the stack garbage is less than filesystem's blocksize, in which
case maxblocks will be zero, and the attempt to find out whether or
not the filesystem has a hole at a given logical block will fail, and
the page cache entry might not get zero'ed out.
Also if the stack garbage in in map_bh->state happens to have the
BH_Mapped bit set, there could be an attempt to call readpage() on a
non-existent page, which could cause nobh_truncate_page() to return an
error when it should not.
Fix this by initializing map_bh->state and map_bh->size.
Fortunately, it's probably fairly unlikely that ext2 and jfs users
mount with nobh these days.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Some ALi devices report simplex if they have been disabled and re-enabled, and
restoring the byte does not work. Ignore it - the needed supporting logic is
already present for the SATA ULi ports.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
Btrfs: Fix oops and use after free during space balancing
Btrfs: set device->total_disk_bytes when adding new device
DaVinci clock support has been updated in mainline.
Update clock names accordingly.
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
ata_piix: Add HP Compaq nc6000 to the broken poweroff list
ahci: add warning messages for hp laptops with broken suspend
pata_efar: fix PIO2 underclocking
pata_legacy: wait for async probing
HP Compaq nc6000 suffers from the double disk spindown issue.
Add it to the broken poweroff DMI list.
Signed-off-by: Ville Syrjala <syrjala@sci.fi>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Harddisks on HP dv[4-6] and HDX18 fail to come online after resume on
earlier BIOSen. Fortunately, HP recently released BIOS updates for
all machines to fix the issue. Detect old BIOSen, warn the user to
update BIOS on boot and suspend attempts and fail suspend.
Kudos to all the bug reporters.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: kernel.org@epperson.homelinux.net
Cc: emisca@gmail.com
Cc: Gadi Cohen <dragon@wastelands.net>
Cc: Paul Swanson <paul@procursa.com>
Cc: s@ourada.org
Cc: Trevor Davenport <trevor.davenport@gmail.com>
Cc: corruptor1972 <steven_tierney@yahoo.co.uk>
Cc: Victoria Wilson <mail@vwilson.co.uk>
Cc: khiraly <khiraly.list@gmail.com>
Cc: Sean <wollombi@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Fix the PIO mode 2 using mode 0 timings -- this driver should enable the
fast timing bank starting with PIO2, just like the PIIX/ICH drivers do.
Also, fix/rephrase some comments while at it.
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
The basic problem here that pata_legacy attaches the host, sees if it found
any devices and detaches it if none were found. With async probing, it's not
waiting until discovery is finished before deciding it has no devices and
trying the detach leading to this warning:
ata1: PATA max PIO4 cmd 0x1f0 ctl 0x3f6 irq 14
------------[ cut here ]------------
WARNING: at drivers/ata/libata-core.c:6222 ata_host_detach+0x75/0x90()
Modules linked in:
Pid: 1, comm: swapper Not tainted 2.6.30-rc7 #1
Call Trace:
[<c01fbb05>] ? ata_host_detach+0x75/0x90
[<c01fbb05>] ? ata_host_detach+0x75/0x90
[<c01139b5>] ? warn_slowpath_common+0x45/0x80
[<c01139fa>] ? warn_slowpath_null+0xa/0x10
[<c01fbb05>] ? ata_host_detach+0x75/0x90
[<c02f40e0>] ? legacy_init+0x44e/0x87f
[<c02f3c92>] ? legacy_init+0x0/0x87f
[<c0101021>] ? _stext+0x21/0x140
[<c01890ff>] ? proc_register+0x2f/0x190
[<c018938c>] ? create_proc_entry+0x5c/0xc0
[<c0135ebe>] ? register_irq_proc+0x6e/0x90
[<c02e6484>] ? kernel_init+0x6e/0xbf
[<c02e6416>] ? kernel_init+0x0/0xbf
[<c01031d7>] ? kernel_thread_helper+0x7/0x10
---[ end trace ef1ee36e873ae3a0 ]---
Because it detaches before the probe is complete.
One way to fix it would be to put an async_synchronize_full() before looking
for devices, which this patch does. A better way might be to separate libata
into its own domain and only wait for that.
Reported-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
The powernow-k8 driver checks to see that the Performance Control/Status
Registers are declared as FFH (functional fixed hardware) by the BIOS.
However, this check got broken in the commit:
0e64a0c982
[CPUFREQ] checkpatch cleanups for powernow-k8
Fix based on an original patch from Naga Chumbalkar.
Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Cc: Mark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: Dave Jones <davej@redhat.com>
This reverts commit 6c51d1cfa0, which
apparently causes DRI initialization failures on Radeons.
Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Requested-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The ivtv stream buffers may be for receive or for send but the attached
sg handle is always destined cpu->device. We flush it correctly but the
allocation is wrongly done with the same type as the buffers.
See bug: http://bugzilla.kernel.org/show_bug.cgi?id=13385
(Note this doesn't close the bug - it fixes the ivtv part and in turn
the logging next shows up some rather alarming DMA sg list warnings in
libata)
Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 95a3540da9 ("ptrace_detach: the wrong
wakeup breaks the ERESTARTxxx logic") removed the "extra"
wake_up_process() from ptrace_detach(), but as Jan pointed out this breaks
the compatibility.
I believe the changelog is right and this wake_up() is wrong in many
ways, but GDB assumes that ptrace(PTRACE_DETACH, child, 0, 0) always
wakes up the tracee.
Despite the fact this breaks SIGNAL_STOP_STOPPED/group_stop_count logic,
and despite the fact this wake_up_process() can break another
assumption: PTRACE_DETACH with SIGSTOP should leave the tracee in
TASK_STOPPED case. Because the untraced child can dequeue SIGSTOP and
call do_signal_stop() before ptrace_detach() calls wake_up_process().
Revert this change for now. We need some fixes even if we we want to keep
the current behaviour, but these fixes are not for 2.6.30.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The checking of CONFIG_FRAME_WARN in the top level Makefile forgot to
actually derefence the variable thus leading to an always true check.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Andi Kleen <ak@suse.de>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The "trace || CLONE_PTRACE" check in tracehook_report_clone() is not right,
- If the untraced task does clone(CLONE_PTRACE) the new child is not traced,
we must not queue SIGSTOP.
- If we forked the traced task, but the tracer exits and untraces both the
forking task and the new child (after copy_process() drops tasklist_lock),
we should not queue SIGSTOP too.
Change the code to check task_ptrace() != 0 instead. This is still racy, but
the race is harmless.
We can race with another tracer attaching to this child, or the tracer can
exit and detach in parallel. But giwen that we didn't do wake_up_new_task()
yet, the child must have the pending SIGSTOP anyway.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm: ignore EDID with really tiny modes.
drm: don't associate _DRM_DRIVER maps with a master
drm/i915: intel_lvds.c fix section mismatch
drm: Hook up DPMS property handling in drm_crtc.c. Add drm_helper_connector_dpms.
drm: set permissions on edid file to 0444
drm: add newlines to text sysfs files
drm/radeon: fix ring free alignment calculations
drm: fix irq naming for kms drivers.
While running 20 parallel instances of dd as follows:
#!/bin/bash
for i in `seq 1 20`; do
dd if=/dev/zero of=/export/hda3/dd_$i bs=1073741824 count=1 &
done
wait
on a 16G machine, we noticed that rather than just killing the processes,
the entire kernel went down. Stracing dd reveals that it first does an
mmap2, which makes 1GB worth of zero page mappings. Then it performs a
read on those pages from /dev/zero, and finally it performs a write.
The machine died during the reads. Looking at the code, it was noticed
that /dev/zero's read operation had been changed by
557ed1fa26 ("remove ZERO_PAGE") from giving
zero page mappings to actually zeroing the page.
The zeroing of the pages causes physical pages to be allocated to the
process. But, when the process exhausts all the memory that it can, the
kernel cannot kill it, as it is still in the kernel mode allocating more
memory. Consequently, the kernel eventually crashes.
To fix this, I propose that when a fatal signal is pending during
/dev/zero read operation, we simply return and let the user process die.
Signed-off-by: Salman Qazi <sqazi@google.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[ Modified error return and comment trivially. - Linus]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The btrfs allocator uses list_for_each to walk the available block
groups when searching for free blocks. It starts off with a hint
to help find the best block group for a given allocation.
The hint is resolved into a block group, but we don't properly check
to make sure the block group we find isn't in the middle of being
freed due to filesystem shrinking or balancing. If it is being
freed, the list pointers in it are bogus and can't be trusted. But,
the code happily goes along and uses them in the list_for_each loop,
leading to all kinds of fun.
The fix used here is to check to make sure the block group we find really
is on the list before we use it. list_del_init is used when removing
it from the list, so we can do a proper check.
The allocation clustering code has a similar bug where it will trust
the block group in the current free space cluster. If our allocation
flags have changed (going from single spindle dup to raid1 for example)
because the drives in the FS have changed, we're not allowed to use
the old block group any more.
The fix used here is to check the current cluster against the
current allocation flags.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
We don't set up the canary; let's disable stack protector on boot.c so
we can get into lguest_init, then set it up. As a side effect,
switch_to_new_gdt() sets up %fs for us properly too.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This could be triggered by a gtt mapping fault on 965 that decides to
remove the fence from another object that happens to be active currently.
Since the other object doesn't rely on the fence reg for its execution, we
don't wait for it to finish. We'll soon be not waiting on 915 most of the
time as well, so just drop the BUG_ON.
Signed-off-by: Eric Anholt <eric@anholt.net>
Pascal reported and bisected a commit:
| x86/PCI: don't call e820_all_mapped with -1 in the mmconfig case
which broke one system system.
ACPI: Using IOAPIC for interrupt routing
PCI: MCFG configuration 0: base f0000000 segment 0 buses 0 - 255
PCI: MCFG area at f0000000 reserved in ACPI motherboard resources
PCI: Using MMCONFIG for extended config space
it didn't have
PCI: updated MCFG configuration 0: base f0000000 segment 0 buses 0 - 63
anymore, and try to use 0xf000000 - 0xffffffff for mmconfig
For 32bit, mcfg_res->end could be 32bit only (if 64 resources aren't used)
So use end - 1 to pass the value in mcfg->end to avoid overflow.
We don't need to worry about the e820 path, they are always 64 bit.
Reported-by: Pascal Terjan <pterjan@mandriva.com>
Bisected-by: Pascal Terjan <pterjan@mandriva.com>
Tested-by: Pascal Terjan <pterjan@mandriva.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: stable@kernel.org
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
The device class may be changed after the fixup, so re-read the class
value from pci_dev when configuring the device. Otherwise some devices
such as JMicron SATA controller won't work.
Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Reviewed-by: Grant Grundler <grundler@parisc-linux.org>
Tested-by: Marc Dionne <marc.c.dionne@gmail.com>
Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Currently, pxa27x_udc tries to use GPIO 0 as D+ pullup if not
explicitly configured. Default to an invalid GPIO (-1) instead.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Some EDIDs lie and report tiny modes that aren't possible. Ignore
these modes.
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
A driver will use the _DRM_DRIVER map flag to indicate that it wants
to be responsible for removing the map itself, bypassing the DRM's
automagic cleanup code.
Since the multi-master changes this has been broken, resulting in some
drivers having their registers unmapped before it's finished with them.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
intel_no_lvds[] does not require __initdata as it is used only by
void intel_lvds_init(struct drm_device *dev).
Signed-off-by: Jaswinder Singh Rajput <jaswinder@kernel.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Making the drm_crtc.c code recognize the DPMS property and invoke the
connector->dpms function doesn't remove any capability from the driver while
reducing code duplication.
That just highlighted the problem with the existing DPMS functions which
could turn off the connector, but failed to turn off any relevant crtcs. The
new drm_helper_connector_dpms function manages all of that, using the
drm_helper-specific crtc and encoder dpms functions, automatically computing
the appropriate DPMS level for each object in the system.
This fixes the current troubles in the i915 driver which left PLLs, pipes
and planes running while in DPMS_OFF mode or even while they were unused.
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Without initializing the sysfs attributes for the edid file,
it was created with mode 0, making it difficult for applications to use.
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
The contents of various simple text files in sysfs should end with
a newline to make them easier to read from the console.
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
fd.o bz#21849
We were aligning to +16 dwords, instead of to the next 16dword
boundary in the ring. Fix the calculation to go to the next 16dword
boundary when space checking.
Signed-off-by: Dave Airlie <airlied@redhat.com>
allocating devname in the i915 driver was a hack originally and I
forgot to figure out how to do this properly back then.
So this is the cleaner version that just picks devname or driver name
in the irq code.
It removes the devname allocs from the i915 driver.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Freescale eSDHC controller has the special order for
the HOST version register. that is not same as the other's
registers. The address of HOSTVER in spec is 0xFE, and
we need use the in_be16(0xFE) to access it, not in_be16(0xFC).
Signed-off-by: Dave Liu <daveliu@freescale.com>
Acked-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
Especially with Sandisk SDHC cards, the second SWITCH command was failing
with a timeout and the card was not recognized at all. However if the
system was busy, or debugging was enabled, or a udelay(100) was inserted
before the second SWITCH command in the core code, then the timing was
so that the card started to work.
With some unusual block sizes, the data FIFO status doesn't indicate a
"empty" state right away when the data transfer is done. Queuing
another data transfer in that condition results in a transfer timeout.
The empty FIFO bit eventually get set by itself in less than 50 usecs
when it is not set right away. So let's just poll for that bit before
configuring the controller with a new data transfer.
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
Empirical evidences show that this is causing far more problems than it
solves when this mode is enabled in the host hardware. Amongst those
cards that are known to be non functional when this bit is set are:
A-Data "Speedy" 2GB SD card
Kodak 512MB SD card
Ativa 1GB MicroSD card
Marvell 8688 (WIFI/Bluetooth) SDIO card
Since those cards do work on other host controllers which do honnor the
hs timing, the issue must be with this particular host hardware.
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
disable_irq() should wait for all running handlers to complete
before returning. As such, if it's used to disable an interrupt
from that interrupt's handler it will deadlock. This replaces
the dangerous instances with the _nosync() variant which doesn't
have this problem.
Signed-off-by: Ben Nizette <bn@niasdigital.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
We plan to use fsl,esdhc going forward as the base compatible so update
the driver to bind against it.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
When a software timeout occurs in polling mode hardware was left in
an indeterminate state causing subsequent operations to block.
Signed-off-by: Martin Fuzzey <mfuzzey@gmail.com>
This is a temporary workaround until the MMC stack can be fixed.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
Remove the __initdata annotation for the clock lookups, since they will
be needed when loading modules which use clk_get().
Tested-by: Agustín Ferrín Pozuelo <gatoguan-os@yahoo.com>
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
