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as-iosched: fix inconsistent ioc->lock context

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Since it's acquired from irq context, all locking must be of the
irq safe variant. Most are already inside the queue lock (which
already disables interrupts), but the io scheduler rmmod path
always has irqs enabled and the put_io_context() path may legally
be called with irqs enabled (even if it isn't usually). So fixup
those two.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2008-02-01 09:44:28 +01:00
parent 4f4f6c2502
commit 8bdd3f8a69
1 changed files with 6 additions and 4 deletions
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10
block/as-iosched.c
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@ -170,11 +170,11 @@ static void free_as_io_context(struct as_io_context *aic)
static void as_trim(struct io_context *ioc)
{
spin_lock(&ioc->lock);
spin_lock_irq(&ioc->lock);
if (ioc->aic)
free_as_io_context(ioc->aic);
ioc->aic = NULL;
spin_unlock(&ioc->lock);
spin_unlock_irq(&ioc->lock);
}
/* Called when the task exits */
@ -235,10 +235,12 @@ static void as_put_io_context(struct request *rq)
aic = RQ_IOC(rq)->aic;
if (rq_is_sync(rq) && aic) {
spin_lock(&aic->lock);
unsigned long flags;
spin_lock_irqsave(&aic->lock, flags);
set_bit(AS_TASK_IORUNNING, &aic->state);
aic->last_end_request = jiffies;
spin_unlock(&aic->lock);
spin_unlock_irqrestore(&aic->lock, flags);
}
put_io_context(RQ_IOC(rq));