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Commit a678cdee authored by Wu Fengguang's avatar Wu Fengguang Committed by Takashi Iwai
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ALSA: hda: take cmd_mutex in probe_codec() 



Now that each codec will have its own module, it is possible
for the user to load one codec while another one is running.

So cmd_mutex would be a safe addition to probe_codec().

Signed-off-by: default avatarWu Fengguang <fengguang.wu@intel.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent deadff16

sound/pci/hda/hda_intel.c

+2 −0
Original line number Diff line number Diff line
@@ -1275,10 +1275,12 @@ static int probe_codec(struct azx *chip, int addr) 
		(AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID;

	unsigned int res;



	mutex_lock(&chip->bus->cmd_mutex);

	chip->probing = 1;

	azx_send_cmd(chip->bus, cmd);

	res = azx_get_response(chip->bus, addr);

	chip->probing = 0;

	mutex_unlock(&chip->bus->cmd_mutex);

	if (res == -1)

		return -EIO;

	snd_printdd(SFX "codec #%d probed OK\n", addr);