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

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>
alistair/sunxi64-5.4-dsi
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;