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ALSA: hdac: Fix codec name after machine driver is unloaded and reloaded

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Currently on each driver reload internal counter is being increased. It
causes failure to enumerate driver devices, as they have hardcoded:
.codec_name = "ehdaudio0D2",
As there is currently no devices with multiple hda codecs and there is
currently no established way to reliably differentiate, between them,
always assign bus->idx = 0;

This fixes a problem when we unload and reload machine driver idx gets
incremented, so .codec_name would've needed to be set to "ehdaudio1D2"
after first reload and so on.

Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Amadeusz Sławiński 2019-06-17 13:36:35 +02:00 committed by Mark Brown
parent 776cb3b80e
commit 8a5b0177a7
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GPG Key ID: 24D68B725D5487D0
1 changed files with 6 additions and 2 deletions
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8
sound/hda/ext/hdac_ext_bus.c
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@ -93,7 +93,6 @@ int snd_hdac_ext_bus_init(struct hdac_bus *bus, struct device *dev,
const struct hdac_ext_bus_ops *ext_ops)
{
int ret;
static int idx;
/* check if io ops are provided, if not load the defaults */
if (io_ops == NULL)
@ -104,7 +103,12 @@ int snd_hdac_ext_bus_init(struct hdac_bus *bus, struct device *dev,
return ret;
bus->ext_ops = ext_ops;
bus->idx = idx++;
/* FIXME:
* Currently only one bus is supported, if there is device with more
* buses, bus->idx should be greater than 0, but there needs to be a
* reliable way to always assign same number.
*/
bus->idx = 0;
bus->cmd_dma_state = true;
return 0;