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authorTakashi Iwai <tiwai@suse.de>2019-12-13 09:51:10 +0100
committerTakashi Iwai <tiwai@suse.de>2019-12-14 18:54:07 +0100
commitcb04fc3b6b076f67d228a0b7d096c69ad486c09c (patch)
tree2c1c600c10d00a85eae16e1e726657c18fdda807 /sound/pci
parent377bc0cfabce0244632dada19060839ced4e6949 (diff)
ALSA: hda/ca0132 - Avoid endless loop
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>
Diffstat (limited to 'sound/pci')
-rw-r--r--sound/pci/hda/patch_ca0132.c5
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)