ALSA: hda: Add NULL check for the driver pointer at unsol event work

snd_hdac_bus_process_unsol_events() assumes that the codec driver is
always set when it's accessible from the codec table.  It's true in
general, but in a sheer timing, it might have been already NULLified
at the driver unbinding.

Although the codec removal should have been done properly by the
previous fixes, just for more safety, let's add a NULL check before
dereferencing and calling the driver's unsol_event callback.

Fixes: e7255c00b10e ("ALSA: hda: Skip event processing for unregistered codecs")
Link: https://patch.msgid.link/20261009133341.440917-6-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

0 files changed, 0 insertions, 0 deletions