diff options
| author | Takashi Iwai <tiwai@suse.de> | 2019-12-13 09:51:10 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-31 16:42:10 +0100 |
| commit | 6598721676c376fbdea5a1433ea31f791cf1f4f1 (patch) | |
| tree | e7062ea1f39e97e5ae0d171da61926c16564a2c5 /sound/pci | |
| parent | 302dc1aeb9672cc53d80ebb36cef725717ebf197 (diff) | |
ALSA: hda/ca0132 - Avoid endless loop
commit cb04fc3b6b076f67d228a0b7d096c69ad486c09c upstream.
Introduce a timeout to dspio_clear_response_queue() so that it won't
be caught in an endless loop even if the hardware doesn't respond
properly.
Fixes: a73d511c4867 ("ALSA: hda/ca0132: Add unsol handler for DSP and jack detection")
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191213085111.22855-3-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/pci')
| -rw-r--r-- | sound/pci/hda/patch_ca0132.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sound/pci/hda/patch_ca0132.c b/sound/pci/hda/patch_ca0132.c index c3d34ff3d9ec..8d0209fff8f5 100644 --- a/sound/pci/hda/patch_ca0132.c +++ b/sound/pci/hda/patch_ca0132.c @@ -1809,13 +1809,14 @@ struct scp_msg { static void dspio_clear_response_queue(struct hda_codec *codec) { + unsigned long timeout = jiffies + msecs_to_jiffies(1000); unsigned int dummy = 0; - int status = -1; + int status; /* clear all from the response queue */ do { status = dspio_read(codec, &dummy); - } while (status == 0); + } while (status == 0 && time_before(jiffies, timeout)); } static int dspio_get_response_data(struct hda_codec *codec) |