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[Bugfix] Misusing variable leads to kernel panic on cloning io request. #24

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[Bugfix] Misusing variable leads to kernel panic on cloning io request. #24

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17 changes: 7 additions & 10 deletions infiniswap_bd/is_mq.c
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Original file line number Diff line number Diff line change
Expand Up @@ -216,8 +216,6 @@ void stackbd_make_request2(struct request_queue *q, struct request *req)
{
struct bio *bio = NULL;
struct bio *b = req->bio;
int i;
int len = req->nr_phys_segments;

spin_lock_irq(&stackbd.lock);
if (!stackbd.bdev_raw)
Expand All @@ -230,15 +228,14 @@ void stackbd_make_request2(struct request_queue *q, struct request *req)
printk("stackbd: Device not active yet, aborting\n");
goto abort;
}
for (i=0; i<len -1; i++){
bio = bio_clone(b, GFP_ATOMIC);
bio_list_add(&stackbd.bio_list, bio);
b = b->bi_next;

for (; b; b = b->bi_next)
{
bio = bio_clone(b, GFP_ATOMIC);
bio->bi_end_io = (bio_end_io_t*)IS_stackbd_end_io;
bio->bi_private = (void*) uint64_from_ptr(req);
bio_list_add(&stackbd.bio_list, bio);
}
bio = bio_clone(b, GFP_ATOMIC);
bio->bi_end_io = (bio_end_io_t*)IS_stackbd_end_io;
bio->bi_private = (void*) uint64_from_ptr(req);
bio_list_add(&stackbd.bio_list, bio);

wake_up(&req_event);
spin_unlock_irq(&stackbd.lock);
Expand Down