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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
..
acorn [ARM] Acorn: move the i2c bus driver into drivers/i2c 2007-03-04 20:40:50 +00:00
acpi Revert "ACPI: parse 2nd MADT by default" 2007-03-30 14:16:10 -04:00
amba
ata Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev 2007-04-04 08:44:40 -07:00
atm [PATCH] zatm __init abuse 2007-03-14 15:27:49 -07:00
auxdisplay [PATCH] cfag12864b: fix crash when built-in and no parport present 2007-02-20 17:10:14 -08:00
base [PATCH] remove protection of LANANA-reserved majors 2007-04-04 21:12:47 -07:00
block [PATCH] cciss: add init of drv->cylinders back to cciss_geometry_inquiry 2007-04-04 21:12:47 -07:00
bluetooth [Bluetooth] Make use of MODULE_FIRMWARE 2007-02-26 11:42:42 -08:00
cdrom [PATCH] Fix soft lockup with iSeries viocd driver 2007-03-05 07:57:51 -08:00
char Merge branch 'for-2.6.21' of master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart 2007-04-09 11:45:18 -07:00
clocksource [PATCH] correct slow acpi_pm rating 2007-03-27 09:05:15 -07:00
connector [CONNECTOR]: Bugfix for cn_call_callback() 2007-03-07 16:08:08 -08:00
cpufreq [PATCH] Fix maxcpus=1 trigerring BUG() in cpufreq 2007-03-27 08:55:56 -07:00
crypto [PATCH] geode-aes: use unsigned long for spin_lock_irqsave 2007-03-06 09:30:25 -08:00
dio
dma [PATCH] rm pointless dmaengine exports 2007-03-16 19:25:03 -07:00
edac
eisa [PATCH] drivers/eisa/pci_eisa.c:pci_eisa_init() should be init 2007-03-27 09:05:15 -07:00
fc4
firmware
hid Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jikos/hid 2007-03-15 10:50:54 -07:00
hwmon [PATCH] hwmon: Build fix for SENSORS_W83793 2007-03-16 19:25:06 -07:00
i2c i2c/ds1374: Check workqueue creation status 2007-03-22 19:49:01 +01:00
ide ide: correctly prevent IDE timer expiry function to run if request was already handled 2007-04-10 22:38:37 +02:00
ieee1394 ieee1394: fix oops on "modprobe -r ohci1394" after network class_device conversion 2007-03-23 10:55:25 +01:00
infiniband Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband 2007-03-28 14:00:01 -07:00
input Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/dtor/input 2007-03-08 07:28:30 -08:00
isdn [PATCH] drivers/isdn/gigaset: mark some static data as const (v2) 2007-03-29 08:22:25 -07:00
kvm KVM: always reload segment selectors 2007-03-27 17:55:48 +02:00
leds
macintosh backlight: Separate backlight properties from backlight ops pointers 2007-02-20 09:26:53 +00:00
mca
md [PATCH] md: avoid a deadlock when removing a device from an md array via sysfs 2007-04-04 21:12:47 -07:00
media V4L/DVB (5496): Pluto2: fix incorrect TSCR register setting 2007-04-02 11:03:05 -03:00
message Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6 2007-03-27 10:06:30 -07:00
mfd [PATCH] drivers/mfd/sm501.c: fix an off-by-one 2007-04-02 10:06:08 -07:00
misc asus-laptop: make code static 2007-03-09 21:06:40 -05:00
mmc [ARM] 4256/1: i.MX/MX1 SDHC fix/workaround of SD card recognition problems 2007-03-12 16:49:37 +00:00
mtd [MTD] [OneNAND] Classify the page data and oob buffer 2007-03-09 08:08:09 +00:00
net [TG3]: Fix crash during tg3_init_one(). 2007-04-06 17:35:37 -07:00
nubus
oprofile [PATCH] oprofile: fix potential deadlock on oprofilefs_lock 2007-03-28 13:58:02 -07:00
parisc Merge master.kernel.org:/pub/scm/linux/kernel/git/kyle/parisc-2.6 2007-02-26 12:48:06 -08:00
parport [PATCH] parport_pc: fix parport_pc_probe_port section warning 2007-02-20 17:10:16 -08:00
pci [PATCH] msi: synchronously mask and unmask msi-x irqs. 2007-04-03 14:02:49 -07:00
pcmcia [PATCH] omap_cf: oops-on-suspend fix 2007-04-08 19:47:55 -07:00
pnp [PATCH] Correctly report PnP 64bit resources 2007-04-02 10:06:08 -07:00
ps3 [PATCH] C99 initializers, proper use of const in drivers/ps3 2007-03-14 15:27:50 -07:00
rapidio
rtc [PATCH] rtc-cmos lockdep fix, irq updates 2007-04-02 10:06:09 -07:00
s390 [S390] cio: Fix handling of interrupt for csch(). 2007-04-04 14:37:39 +02:00
sbus [SPARC] uctrl: Check request_irq() return value. 2007-02-26 11:35:51 -08:00
scsi [SCSI]: Fix scsi_send_eh_cmnd scatterlist handling 2007-04-02 14:26:22 -07:00
serial [PATCH] add Fujitsu Siemens Tablet PC devices to 8250_pnp.c 2007-03-23 11:01:22 -07:00
sh
sn
spi [PATCH] drivers/spi/: fix section mismatches 2007-03-27 09:05:15 -07:00
tc [PATCH] Fix build error on zs serial driver 2007-04-04 21:12:47 -07:00
telephony
usb USB: fix usb-serial/ftdi build warning 2007-03-26 14:17:48 -07:00
video [VIDEO]: Fix section mismatch in cg3.c 2007-03-28 12:50:56 -07:00
w1
zorro
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