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bio: fix refcounting

This commit is contained in:
Thomas Schoebel-Theuer 2014-04-17 09:01:46 +02:00 committed by Thomas Schoebel-Theuer
parent a35585325d
commit 7e932641df
1 changed files with 10 additions and 2 deletions
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12
kernel/mars_bio.c
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@ -425,15 +425,17 @@ done: ;
static
void bio_ref_io(struct bio_output *output, struct mref_object *mref)
{
CHECK_PTR(mref, fatal);
_mref_get(mref);
atomic_inc(&mars_global_io_flying);
if (mref->ref_prio == MARS_PRIO_LOW ||
(mref->ref_prio == MARS_PRIO_NORMAL && mref->ref_rw)) {
struct bio_mref_aspect *mref_a = bio_mref_get_aspect(output->brick, mref);
struct bio_brick *brick = output->brick;
unsigned long flags;
_mref_get(mref);
spin_lock_irqsave(&brick->lock, flags);
list_add_tail(&mref_a->io_head, &brick->queue_list[PRIO_INDEX(mref)]);
atomic_inc(&brick->queue_count[PRIO_INDEX(mref)]);
@ -443,8 +445,14 @@ void bio_ref_io(struct bio_output *output, struct mref_object *mref)
wake_up_interruptible(&brick->submit_event);
return;
}
// realtime IO: start immediately
_bio_ref_io(output, mref, false);
BIO_REF_PUT(output, mref);
return;
fatal:
MARS_FAT("cannot handle mref %p on output %p\n", mref, output);
}
static