tree 563848112b08ad5b76c4f70b46cc3fe9af1ad936
parent da484d00f020af3dd7cfcc6c4b69a7f856832883
author Kangjie Lu <kjlu@umn.edu> 1552622309 -0500
committer Takashi Iwai <tiwai@suse.de> 1552728542 +0100

ALSA: echoaudio: add a check for ioremap_nocache

In case ioremap_nocache fails, the fix releases chip and returns
an error code upstream to avoid NULL pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>