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a1f9a89c90
With 2.6.30-rc2 I face a kernel crash on the 32bit hppa architecture due to ide-cd when udev creates the device nodes at startup: Kernel Fault: Code=26 regs=8ed34c40 (Addr=00000024) IASQ: 00000000 00000000 IAOQ: 1034b5ac 1034b5b0 IIR: 4ab30048 ISR: 00000000 IOR: 00000024 CPU: 0 CR30: 8ed34000 CR31: ffff55ff ORIG_R28: 00000000 IAOQ[0]: ide_complete_rq+0x2c/0x70 IAOQ[1]: ide_complete_rq+0x30/0x70 RP(r2): cdrom_newpc_intr+0x178/0x46c Backtrace: [<1035c608>] cdrom_newpc_intr+0x178/0x46c [<1034c494>] ide_intr+0x1b0/0x214 [<1016d284>] handle_IRQ_event+0x70/0x150 [<1016d4b0>] __do_IRQ+0x14c/0x1cc [<102f7864>] superio_interrupt+0x88/0xbc [<1016d284>] handle_IRQ_event+0x70/0x150 [<1016d4b0>] __do_IRQ+0x14c/0x1cc [<10112efc>] do_cpu_irq_mask+0x9c/0xd0 [<10116068>] intr_return+0x0/0x4 This crash seems to happen due to an uninitialized variable "rc". The compiler even warns about that: CC drivers/ide/ide-cd.o /mnt/sda4/home/cvs/parisc/git-kernel/linus-linux-2.6/drivers/ide/ide-cd.c: In function `cdrom_newpc_intr': /mnt/sda4/home/cvs/parisc/git-kernel/linus-linux-2.6/drivers/ide/ide-cd.c:612: warning: `rc' might be used uninitialized in this function After applying the trivial patch below, which just initializes the variable to zero, the kernel doesn't crash any longer: Starting the hotplug events dispatcher: udevd. Synthesizing the initial hotplug events... hda: command error: status=0x51 { DriveReady SeekComplete Error } hda: command error: error=0x54 <3>{ AbortedCommand LastFailedSense=0x05 } ide: failed opcode was: unknown done. Signed-off-by: Helge Deller <deller@gmx.de> Acked-by: Borislav Petkov <petkovbb@gmail.com> Cc: Linus <torvalds@linux-foundation.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> |
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.. | ||
aec62xx.c | ||
ali14xx.c | ||
alim15x3.c | ||
amd74xx.c | ||
at91_ide.c | ||
atiixp.c | ||
au1xxx-ide.c | ||
buddha.c | ||
cmd64x.c | ||
cmd640.c | ||
cs5520.c | ||
cs5530.c | ||
cs5535.c | ||
cs5536.c | ||
cy82c693.c | ||
delkin_cb.c | ||
dtc2278.c | ||
falconide.c | ||
gayle.c | ||
hpt366.c | ||
ht6560b.c | ||
icside.c | ||
ide_platform.c | ||
ide-4drives.c | ||
ide-acpi.c | ||
ide-atapi.c | ||
ide-cd_ioctl.c | ||
ide-cd_verbose.c | ||
ide-cd.c | ||
ide-cd.h | ||
ide-cs.c | ||
ide-devsets.c | ||
ide-disk_ioctl.c | ||
ide-disk_proc.c | ||
ide-disk.c | ||
ide-disk.h | ||
ide-dma-sff.c | ||
ide-dma.c | ||
ide-eh.c | ||
ide-floppy_ioctl.c | ||
ide-floppy_proc.c | ||
ide-floppy.c | ||
ide-floppy.h | ||
ide-gd.c | ||
ide-gd.h | ||
ide-generic.c | ||
ide-h8300.c | ||
ide-io-std.c | ||
ide-io.c | ||
ide-ioctls.c | ||
ide-iops.c | ||
ide-legacy.c | ||
ide-lib.c | ||
ide-park.c | ||
ide-pci-generic.c | ||
ide-pio-blacklist.c | ||
ide-pm.c | ||
ide-pnp.c | ||
ide-probe.c | ||
ide-proc.c | ||
ide-scan-pci.c | ||
ide-sysfs.c | ||
ide-tape.c | ||
ide-taskfile.c | ||
ide-timings.c | ||
ide-xfer-mode.c | ||
ide.c | ||
it821x.c | ||
it8172.c | ||
it8213.c | ||
jmicron.c | ||
Kconfig | ||
macide.c | ||
Makefile | ||
ns87415.c | ||
opti621.c | ||
palm_bk3710.c | ||
pdc202xx_new.c | ||
pdc202xx_old.c | ||
piix.c | ||
pmac.c | ||
q40ide.c | ||
qd65xx.c | ||
qd65xx.h | ||
rapide.c | ||
rz1000.c | ||
sc1200.c | ||
scc_pata.c | ||
serverworks.c | ||
setup-pci.c | ||
sgiioc4.c | ||
siimage.c | ||
sis5513.c | ||
sl82c105.c | ||
slc90e66.c | ||
tc86c001.c | ||
triflex.c | ||
trm290.c | ||
tx4938ide.c | ||
tx4939ide.c | ||
umc8672.c | ||
via82cxxx.c |