This is a note to let you know that I've just added the patch titled
dmaengine: ti: k3-psil: fix deadlock on error path
to the 5.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dmaengine-ti-k3-psil-fix-deadlock-on-error-path.patch
and it can be found in the queue-5.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 57dd747dcdaa5691451c8ff4017771c766064127
Author: Grygorii Strashko <grygorii.strashko@xxxxxx>
Date: Wed Apr 8 21:55:01 2020 +0300
dmaengine: ti: k3-psil: fix deadlock on error path
commit 172d59ecd61b89f535ad99a7e531c0f111453b9a upstream.
The mutex_unlock() is missed on error path of psil_get_ep_config()
which causes deadlock, so add missed mutex_unlock().
Fixes: 8c6bb62f6b4a ("dmaengine: ti: k3 PSI-L remote endpoint configuration")
Signed-off-by: Grygorii Strashko <grygorii.strashko@xxxxxx>
Acked-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
Link: https://lore.kernel.org/r/20200408185501.30776-1-grygorii.strashko@xxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
diff --git a/drivers/dma/ti/k3-psil.c b/drivers/dma/ti/k3-psil.c
index d7b965049ccb1..fb7c8150b0d1d 100644
--- a/drivers/dma/ti/k3-psil.c
+++ b/drivers/dma/ti/k3-psil.c
@@ -27,6 +27,7 @@ struct psil_endpoint_config *psil_get_ep_config(u32 thread_id)
soc_ep_map = &j721e_ep_map;
} else {
pr_err("PSIL: No compatible machine found for map\n");
+ mutex_unlock(&ep_map_mutex);
return ERR_PTR(-ENOTSUPP);
}
pr_debug("%s: Using map for %s\n", __func__, soc_ep_map->name);
