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SCSI fixes on 20130824

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This is a set of small bug fixes for lpfc and zfcp and a fix for a fairly
 nasty bug in sg where a process which cancels I/O completes in a kernel thread
 which would then try to write back to the now gone userspace and end up
 writing to a random kernel address instead.
 
 Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "This is a set of small bug fixes for lpfc and zfcp and a fix for a
  fairly nasty bug in sg where a process which cancels I/O completes in
  a kernel thread which would then try to write back to the now gone
  userspace and end up writing to a random kernel address instead"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  [SCSI] zfcp: remove access control tables interface (keep sysfs files)
  [SCSI] zfcp: fix schedule-inside-lock in scsi_device list loops
  [SCSI] zfcp: fix lock imbalance by reworking request queue locking
  [SCSI] sg: Fix user memory corruption when SG_IO is interrupted by a signal
  [SCSI] lpfc: Don't force CONFIG_GENERIC_CSUM on
This commit is contained in:
Linus Torvalds 2013-08-24 11:33:21 -07:00
commit 5befb98b30
6 changed files with 110 additions and 19 deletions
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57
include/linux/wait.h
View file

@ -811,6 +811,63 @@ do { \
__ret; \
})
#define __wait_event_interruptible_lock_irq_timeout(wq, condition, \
lock, ret) \
do { \
DEFINE_WAIT(__wait); \
\
for (;;) { \
prepare_to_wait(&wq, &__wait, TASK_INTERRUPTIBLE); \
if (condition) \
break; \
if (signal_pending(current)) { \
ret = -ERESTARTSYS; \
break; \
} \
spin_unlock_irq(&lock); \
ret = schedule_timeout(ret); \
spin_lock_irq(&lock); \
if (!ret) \
break; \
} \
finish_wait(&wq, &__wait); \
} while (0)
/**
* wait_event_interruptible_lock_irq_timeout - sleep until a condition gets true or a timeout elapses.
* The condition is checked under the lock. This is expected
* to be called with the lock taken.
* @wq: the waitqueue to wait on
* @condition: a C expression for the event to wait for
* @lock: a locked spinlock_t, which will be released before schedule()
* and reacquired afterwards.
* @timeout: timeout, in jiffies
*
* The process is put to sleep (TASK_INTERRUPTIBLE) until the
* @condition evaluates to true or signal is received. The @condition is
* checked each time the waitqueue @wq is woken up.
*
* wake_up() has to be called after changing any variable that could
* change the result of the wait condition.
*
* This is supposed to be called while holding the lock. The lock is
* dropped before going to sleep and is reacquired afterwards.
*
* The function returns 0 if the @timeout elapsed, -ERESTARTSYS if it
* was interrupted by a signal, and the remaining jiffies otherwise
* if the condition evaluated to true before the timeout elapsed.
*/
#define wait_event_interruptible_lock_irq_timeout(wq, condition, lock, \
timeout) \
({ \
int __ret = timeout; \
\
if (!(condition)) \
__wait_event_interruptible_lock_irq_timeout( \
wq, condition, lock, __ret); \
__ret; \
})
/*
* These are the old interfaces to sleep waiting for an event.