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[SCSI] libiscsi: fix iscsi pool error path

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Le lundi 30 mars 2009, Chris Wright a écrit :
> q->queue could be ERR_PTR(-ENOMEM) which will break unwinding
> on error.  Make iscsi_pool_free more defensive.
>

Making the freeing of q->queue dependent on q->pool being set looks
really weird (although it is correct at the moment. But this seems
to be fixable in a much simpler way.

With the benefit that only the error case is slowed down. In both
cases we have a problem if q->queue contains an error value but it's
not -ENOMEM. Apparently this can't happen today, but it doesn't feel
right to assume this will always be true. Maybe it's the right time
to fix this as well.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Jean Delvare 2009-04-01 13:11:29 -05:00 committed by James Bottomley
parent 5b2639d59a
commit fd6e1c14b7
1 changed files with 3 additions and 1 deletions
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4
drivers/scsi/libiscsi.c
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@ -1999,8 +1999,10 @@ iscsi_pool_init(struct iscsi_pool *q, int max, void ***items, int item_size)
q->queue = kfifo_init((void*)q->pool, max * sizeof(void*), q->queue = kfifo_init((void*)q->pool, max * sizeof(void*),
GFP_KERNEL, NULL); GFP_KERNEL, NULL);
if (q->queue == ERR_PTR(-ENOMEM)) if (IS_ERR(q->queue)) {
q->queue = NULL;
goto enomem; goto enomem;
}
for (i = 0; i < max; i++) { for (i = 0; i < max; i++) {
q->pool[i] = kzalloc(item_size, GFP_KERNEL); q->pool[i] = kzalloc(item_size, GFP_KERNEL);