We have seen this value on a development platform.
Signed-off-by: Jaroslav Kysela <perex@xxxxxxxx>
---
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);
--
2.13.6
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