[PATCH 6/6] ALSA: pcm: Return -ENODEV instead of -EFAULT in snd_pcm_open()

[phucduc.bui@gmail.com]

From: bui duc phuc <phucduc.bui@gmail.com>

When try_module_get() fails in snd_pcm_open(), the owning module is going
away and the device is no longer usable, so -EFAULT ("bad address") is the
wrong error. Return -ENODEV, matching the other unavailable-device paths
in this function(the NULL pcm check and the card->shutdown check).
This changes the errno reported to userspace on this rare race.
No other behaviour changes.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 sound/core/pcm_native.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 3462cd5275a2..4fe5fab8d096 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -2913,7 +2913,7 @@ static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
 	if (err < 0)
 		goto __error1;
 	if (!try_module_get(pcm->card->module)) {
-		err = -EFAULT;
+		err = -ENODEV;
 		goto __error2;
 	}
 	init_waitqueue_entry(&wait, current);
-- 
2.43.0