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Ian Abbott aaeb61a97b staging: comedi: amplc_pc236: fix invalid register access during detach 
`pc236_detach()` is called by the comedi core if it attempted to attach
a device and failed.  `pc236_detach()` calls `pc236_intr_disable()` if
the comedi device private data pointer (`devpriv`) is non-null.  This
test is insufficient as `pc236_intr_disable()` accesses hardware
registers and the attach routine may have failed before it has saved
their I/O base addresses.

Fix it by checking `dev->iobase` is non-zero before calling
`pc236_intr_disable()` as that means the I/O base addresses have been
saved and the hardware registers can be accessed.  It also implies the
comedi device private data pointer is valid, so there is no need to
check it.

Cc: <stable@vger.kernel.org> # 3.5.x, 3.6.x
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2012-10-22 11:46:35 -07:00
..
accessibility vt:tackle kbd_table 2012-03-08 10:50:35 -08:00
acpi Merge branches 'fixes-for-37', 'ec' and 'thermal' into release 2012-10-09 01:47:35 -04:00
amba Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-07-27 15:14:26 -07:00
ata Merge branch 'samsung_platform_data' into staging/for_v3.7 2012-10-05 22:32:05 -03:00
atm sections: fix section conflicts in drivers/atm 2012-10-06 03:04:40 +09:00
auxdisplay Fix common misspellings 2011-03-31 11:26:23 -03:00
base memory-hotplug: update memory block's state and notify userspace 2012-10-09 16:23:02 +09:00
bcma Merge commit '371a00448f' of 'git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git' 2012-09-29 15:37:49 +01:00
block Merge branch 'for-3.7/core' of git://git.kernel.dk/linux-block 2012-10-11 09:04:23 +09:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-10-02 13:38:27 -07:00
bus drivers: bus: omap_l3: fixup merge conflict resolution 2012-10-01 19:39:48 -07:00
cdrom workqueue: deprecate flush[_delayed]_work_sync() 2012-08-20 14:51:24 -07:00
char Merge branch 'tpmdd-next-v3.6' of git://github.com/shpedoikal/linux into for-linus 2012-10-11 18:41:29 +08:00
clk spi: Updates for v3.7 2012-10-02 17:26:42 -07:00
clocksource Power management updates for 3.7-rc1 2012-10-02 18:32:35 -07:00
connector Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-10-02 13:38:27 -07:00
cpufreq cpufreq: OMAP: use get_cpu_device() instead of omap_device API 2012-10-08 14:58:56 -07:00
cpuidle ACPI idle, CPU hotplug: Fix NULL pointer dereference during hotplug 2012-10-08 22:52:54 -04:00
crypto ARM: soc: late platform updates 2012-10-07 20:55:16 +09:00
dca drivers/dca: Add export.h for THIS_MODULE to dca-sysfs.c 2011-10-31 19:31:43 -04:00
devfreq workqueue: make deferrable delayed_work initializer names consistent 2012-08-21 13:18:23 -07:00
dio m68k: don't export static inline functions 2009-12-06 11:18:28 +01:00
dma Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2012-10-10 11:10:41 +09:00
edac Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-10-06 03:16:12 +09:00
eisa eisa/pci_eisa.c: fix BUG introduced by 005bdad7b8 2011-08-04 06:32:51 -10:00
extcon Merge branch 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq 2012-10-02 09:54:49 -07:00
firewire firewire: cdev: fix user memory corruption (i386 userland on amd64 kernel) 2012-10-09 18:26:28 +02:00
firmware firmware: Add missing attributes to EFI variable attribute print out from sysfs 2012-09-10 16:40:30 -07:00
gpio Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2012-10-09 16:08:04 +09:00
gpu fbdev updates for 3.7 2012-10-12 10:21:02 +09:00
hid Merge branch 'next' into for-linus 2012-10-11 00:45:21 -07:00
hsi HSI: hsi_char: Remove max_data_size from sysfs 2012-04-23 14:23:32 +03:00
hv Drivers: hv: kvp: Copy the address family information 2012-09-05 12:12:38 -07:00
hwmon Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-10-13 11:27:59 +09:00
hwspinlock hwspinlock/core: move the dereference below the NULL test 2012-09-10 13:19:25 +03:00
i2c Merge branch 'i2c-embedded/for-next' of git://git.pengutronix.de/git/wsa/linux 2012-10-11 10:27:51 +09:00
ide sections: fix section conflicts in drivers/ide 2012-10-06 03:04:41 +09:00
idle intel_idle: enable IVB Xeon support 2012-09-26 22:28:21 -04:00
iio iio: Remove duplicates for light/ in Kconfig and Makefile 2012-10-19 19:44:06 +01:00
infiniband Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2012-10-10 19:52:19 +09:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2012-10-13 10:56:03 +09:00
iommu IOMMU Updates for Linux v3.7-rc1 2012-10-08 06:33:44 +09:00
irqchip irqchip: fill in empty Kconfig 2012-09-24 10:07:40 -07:00
isdn isdn: fix a wrapping bug in isdn_ppp_ioctl() 2012-10-10 22:50:45 -04:00
leds Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-10-10 20:14:07 +09:00
lguest Merge branch 'virtio-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-07 21:04:56 +09:00
macintosh Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-10-06 03:16:12 +09:00
md md updates for 3.7 2012-10-13 13:22:01 -07:00
media Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2012-10-12 12:39:17 +09:00
memory memory: tegra{20,30}-mc: Fix reading incorrect register in mc_readl() 2012-09-26 14:04:09 -07:00
memstick memstick: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:19 +08:00
message [SCSI] Fusion MPT: disable pci device when mpt map resoures failed 2012-09-14 17:59:29 +01:00
mfd 1. New drivers: 2012-10-07 17:29:24 +09:00
misc pwm: Changes for v3.7-rc1 2012-10-10 20:15:24 +09:00
mmc mmc: mxs-mmc: Fix merge issue causing build error 2012-10-11 17:21:40 -04:00
mtd mtd: Disable mtdchar mmap on MMU systems 2012-10-09 15:08:42 +01:00
net mcs7830: Fix link state detection 2012-10-12 13:56:52 -04:00
nfc NFC: Fix missing mutex unlock in pn533_send_cmd_frame_async 2012-09-27 10:47:48 +02:00
nubus Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
of Devicetree updates for 3.7 2012-10-03 09:44:08 -07:00
oprofile mm: use mm->exe_file instead of first VM_EXECUTABLE vma->vm_file 2012-10-09 16:22:18 +09:00
parisc parisc/PCI: Use list_for_each_entry() for bus->devices traversal 2012-08-22 11:34:38 -06:00
parport Xtensa patchset for 3.7 2012-10-09 16:11:46 +09:00
pci Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-10-06 03:16:12 +09:00
pcmcia ARM: soc: multiplatform enablement 2012-10-01 19:11:38 -07:00
pinctrl pinctrl/nomadik: use simple or linear IRQ domain 2012-10-10 08:57:26 +02:00
platform Merge branches 'fixes-for-37', 'ec' and 'thermal' into release 2012-10-09 01:47:35 -04:00
pnp ACPI: Allow ACPI binding with USB-3.0 hub 2012-09-21 13:30:29 -04:00
power Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-10-13 11:27:59 +09:00
pps idr: rename MAX_LEVEL to MAX_IDR_LEVEL 2012-10-06 03:04:56 +09:00
ps3 drivers/ps3: Fix checkpatch warnings in ps3av.c 2012-04-24 18:18:01 -07:00
ptp ptp: link the phc device to its parent device 2012-09-22 15:42:38 -04:00
pwm pwm: Changes for v3.7-rc1 2012-10-10 20:15:24 +09:00
rapidio rapidio: update for destination ID allocation 2012-10-11 08:50:15 +09:00
regulator MFD bits for the 3.7 merge window. 2012-10-05 12:01:30 +09:00
remoteproc Merge branch 'virtio-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-07 21:04:56 +09:00
rpmsg Merge branch 'virtio-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-07 21:04:56 +09:00
rtc rtc: kconfig: fix RTC_INTF defaults connected to RTC_CLASS 2012-10-11 08:50:16 +09:00
s390 s390/zcrypt: remove duplicated include from zcrypt_pcixcc.c 2012-10-09 14:17:00 +02:00
sbus drivers/sbus/char: removes unnecessary semicolon 2012-09-21 12:08:56 -07:00
scsi SCSI misc on 20121012 2012-10-13 10:57:01 +09:00
sfi drivers/sfi: sfi_acpi.c needs sysfs.h 2011-10-31 19:31:57 -04:00
sh ARM: soc: multiplatform enablement 2012-10-01 19:11:38 -07:00
sn include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
spi Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2012-10-10 11:10:41 +09:00
ssb ssb: check for flash presentence 2012-08-10 15:27:02 -04:00
staging staging: comedi: amplc_pc236: fix invalid register access during detach 2012-10-22 11:46:35 -07:00
target Merge branch 'for-3.7/core' of git://git.kernel.dk/linux-block 2012-10-11 09:04:23 +09:00
tc include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
thermal Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux into thermal 2012-10-09 01:35:52 -04:00
tty KGDB/KDB fixes and cleanups 2012-10-13 11:16:58 +09:00
uio mm: kill vma flag VM_RESERVED and mm->reserved_vm counter 2012-10-09 16:22:19 +09:00
usb Add CDC-ACM support for the CX93010-2x UCMxx USB Modem 2012-10-11 15:18:49 -04:00
uwb uwb: fix error handling 2012-04-18 13:15:51 -07:00
vfio vfio: Fix PCI INTx disable consistency 2012-10-10 09:10:32 -06:00
vhost Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2012-10-10 19:52:19 +09:00
video fbdev updates for 3.7 2012-10-12 10:21:02 +09:00
virt drivers/virt: add ioctl for 32-bit compat on 64-bit to fsl-hv-manager 2011-10-14 02:56:02 -05:00
virtio virtio_mmio: Don't attempt to create empty virtqueues 2012-09-28 15:05:16 +09:30
vlynq vlynq: Convert irq functions 2011-03-28 19:33:04 +02:00
vme vme: vme_ca91cx42.c: use list_for_each_safe() when delete list items 2012-09-06 13:29:11 -07:00
w1 char/misc driver merge for 3.7-rc1 2012-10-01 12:09:59 -07:00
watchdog Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu 2012-10-07 21:06:10 +09:00
xen Feature: 2012-10-12 22:20:28 +09:00
zorro zorro: Remove unused zorro_bus.devices 2012-07-15 19:56:38 +02:00
Kconfig ARM: soc: driver specific changes 2012-10-01 18:46:13 -07:00
Makefile Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-10-02 13:38:27 -07:00