From de24125dd0a452bfd4502fc448e3534c5d2e87aa Mon Sep 17 00:00:00 2001 From: Yuri Tikhonov Date: Fri, 5 Sep 2008 08:15:47 -0700 Subject: [PATCH] async_tx: fix the bug in async_tx_run_dependencies Should clear the next pointer of the TX if we are sure that the next TX (say NXT) will be submitted to the channel too. Overwise, we break the chain of descriptors, because we lose the information about the next descriptor to run. So next time, when invoke async_tx_run_dependencies() with TX, it's TX->next will be NULL, and NXT will be never submitted. Cc: [2.6.26] Signed-off-by: Yuri Tikhonov Signed-off-by: Ilya Yanok Signed-off-by: Dan Williams --- crypto/async_tx/async_tx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/crypto/async_tx/async_tx.c b/crypto/async_tx/async_tx.c index 85eaf7b1c531..e8362c1efa30 100644 --- a/crypto/async_tx/async_tx.c +++ b/crypto/async_tx/async_tx.c @@ -137,7 +137,8 @@ async_tx_run_dependencies(struct dma_async_tx_descriptor *tx) spin_lock_bh(&next->lock); next->parent = NULL; _next = next->next; - next->next = NULL; + if (_next && _next->chan == chan) + next->next = NULL; spin_unlock_bh(&next->lock); next->tx_submit(next); -- 2.20.1