ALSA: info: Fix memory leak at card removal

The fix for potential deadlock at disconnection by the commit
c7a606519533 ("ALSA: info: Fix potential deadlock at disconnection")
clears card->proc_root pointer at snd_info_card_disconnect(), in order
just to be sure.  But this leads to a memory leak of card->proc_root
content that should have been released at a later call of
snd_info_card_free().

For addressing the memory leak, simply drop the card->proc_root
clearance at snd_info_card_disconnect().

Since card->proc_root might be still looked at in
snd_info_card_id_change() that may be running concurrently during the
connection procedure, add a sanity check there, too.

Fixes: c7a606519533 ("ALSA: info: Fix potential deadlock at disconnection")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Closes: https://sashiko.dev/#/patchset/20261006174002.703431-1-tiwai%40suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20261007172533.14667-5-tiwai@suse.de

0 files changed, 0 insertions, 0 deletions