[alsa-devel] [PATCH] ALSA: hda controller - handle -1 value as error in snd_hdac_bus_parse_capabilities()

We have seen this value on a development platform.

Signed-off-by: Jaroslav Kysela perex@perex.cz --- sound/hda/hdac_controller.c | 5 +++++ 1 file changed, 5 insertions(+)

diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c index 978dc1801b3a..4a1823290b2d 100644 --- a/sound/hda/hdac_controller.c +++ b/sound/hda/hdac_controller.c @@ -278,6 +278,11 @@ int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus) do { cur_cap = _snd_hdac_chip_readl(bus, offset);

+ if (cur_cap == 0xffffffff) { + dev_dbg(bus->dev, "Wrong capability -1\n"); + break; + } + dev_dbg(bus->dev, "Capability version: 0x%x\n", (cur_cap & AZX_CAP_HDR_VER_MASK) >> AZX_CAP_HDR_VER_OFF);