tmp_suning_uos_patched/drivers/ide
Suleiman Souhlal 23450319e2 ide: correctly prevent IDE timer expiry function to run if request was already handled
It is possible for the timer expiry function to run even though the
request has already been handled: ide_timer_expiry() only checks that
the handler is not NULL, but it is possible that we have handled a
request (thus clearing the handler) and then started a new request
(thus starting the timer again, and setting a handler). 

A simple way to exhibit this is to set the DMA timeout to 1 jiffy and
run dd: The kernel will panic after a few minutes because
ide_timer_expiry() tries to add a timer when it's already active.

To fix this, we simply add a request generation count that gets
incremented at every interrupt, and check in ide_timer_expiry() that
we have not already handled a new interrupt before running the expiry
function.

Signed-off-by: Suleiman Souhlal <suleiman@google.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-04-10 22:38:37 +02:00
..
arm ide: remove CONFIG_IDEDMA_{ICS,PCI}_AUTO config options 2007-03-17 21:57:41 +01:00
cris ide: remove a ton of pointless #undef REALLY_SLOW_IO 2007-03-03 17:48:54 +01:00
h8300 ide: convert ide_hwif_t.mmio into flag (v2) 2007-02-17 02:40:25 +01:00
legacy ide: make legacy IDE VLB modules check for the "probe" kernel params (v2) 2007-03-03 17:48:55 +01:00
mips ide: au1xxx: fix use of mixed declarations and code 2007-03-17 21:57:24 +01:00
pci pdc202xx_new: Enable ATAPI DMA 2007-03-26 23:03:19 +02:00
ppc scc_pata: dependency fix 2007-03-17 21:57:25 +01:00
ide-acpi.c ide-acpi support warning fix 2007-02-07 18:19:42 +01:00
ide-cd.c ide: make ide_hwif_t.ide_dma_{host_off,off_quietly} void (v2) 2007-02-17 02:40:26 +01:00
ide-cd.h
ide-disk.c ide: remove a ton of pointless #undef REALLY_SLOW_IO 2007-03-03 17:48:54 +01:00
ide-dma.c ide: don't allow DMA to be enabled if CONFIG_IDEDMA_{ICS,PCI}_AUTO=n 2007-03-17 21:57:39 +01:00
ide-floppy.c ide: make ide_hwif_t.ide_dma_{host_off,off_quietly} void (v2) 2007-02-17 02:40:26 +01:00
ide-generic.c
ide-io.c ide: correctly prevent IDE timer expiry function to run if request was already handled 2007-04-10 22:38:37 +02:00
ide-iops.c ide: correctly prevent IDE timer expiry function to run if request was already handled 2007-04-10 22:38:37 +02:00
ide-lib.c ide: ide_get_best_pio_mode() returns incorrect IORDY setting (take 2) 2007-03-03 17:48:53 +01:00
ide-pnp.c ide: unregister idepnp driver on unload 2007-01-27 13:47:02 +01:00
ide-probe.c ide: remove a ton of pointless #undef REALLY_SLOW_IO 2007-03-03 17:48:54 +01:00
ide-proc.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
ide-tape.c ide: make ide_hwif_t.ide_dma_{host_off,off_quietly} void (v2) 2007-02-17 02:40:26 +01:00
ide-taskfile.c [PATCH] ide: add sanity checking to ide taskfile ioctl 2006-10-16 08:27:54 -07:00
ide-timing.h [PATCH] ide: actually honor drive's minimum PIO/DMA cycle times 2006-06-26 09:58:27 -07:00
ide.c ide: fix locking for manual DMA enable/disable ("hdparm -d") 2007-03-26 23:03:19 +02:00
Kconfig ide: cosmetic adaption of drivers/ide/Kconfig concerning SATA 2007-03-26 23:03:19 +02:00
Makefile scc_pata: dependency fix 2007-03-17 21:57:25 +01:00
setup-pci.c ide: remove CONFIG_IDEDMA_{ICS,PCI}_AUTO config options 2007-03-17 21:57:41 +01:00