From: Greg Kroah-Hartman gregkh@linuxfoundation.org
commit 94f88309f201821073f57ae6005caefa61bf7b7e upstream.
This reverts commit dcd0feac9bab901d5739de51b3f69840851f8919.
Because of recent interactions with developers from @umn.edu, all commits from them have been recently re-reviewed to ensure if they were correct or not.
Upon review, this commit was found to be incorrect for the reasons below, so it must be reverted. It will be fixed up "correctly" in a later kernel change.
The original commit message for this change was incorrect as the code path can never result in a NULL dereference, alluding to the fact that whatever tool was used to "find this" is broken. It's just an optional resource reservation, so removing this check is fine.
Cc: Kangjie Lu kjlu@umn.edu Acked-by: Takashi Iwai tiwai@suse.de Fixes: dcd0feac9bab ("ALSA: sb8: add a check for request_region") Cc: stable stable@vger.kernel.org Link: https://lore.kernel.org/r/20210503115736.2104747-35-gregkh@linuxfoundation.o... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- sound/isa/sb/sb8.c | 4 ---- 1 file changed, 4 deletions(-)
--- a/sound/isa/sb/sb8.c +++ b/sound/isa/sb/sb8.c @@ -96,10 +96,6 @@ static int snd_sb8_probe(struct device *
/* block the 0x388 port to avoid PnP conflicts */ acard->fm_res = request_region(0x388, 4, "SoundBlaster FM"); - if (!acard->fm_res) { - err = -EBUSY; - goto _err; - }
if (port[dev] != SNDRV_AUTO_PORT) { if ((err = snd_sbdsp_create(card, port[dev], irq[dev],