ALSA: gus: Fix erroneous memory allocation

snd_gf1_mem_xalloc() returns NULL incorrectly when the memory chunk is
allocated in the middle of the chain.  This patch corrects the return
value to treat it properly.

Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20211213132444.22385-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/isa/gus/gus_mem.c b/sound/isa/gus/gus_mem.c
index 4c691dbf27211ae705d6d784d6390ce2f2206182..5e3ff3137dd74c450a79e7fbf875f3ac05281d59 100644 (file)
--- a/sound/isa/gus/gus_mem.c
+++ b/sound/isa/gus/gus_mem.c
@@ -44,7 +44,7 @@ static struct snd_gf1_mem_block *snd_gf1_mem_xalloc(struct snd_gf1_mem * alloc,
                        else
                                nblock->prev->next = nblock;
                        mutex_unlock(&alloc->memory_mutex);
-                       return NULL;
+                       return nblock;
                }
                pblock = pblock->next;
        }