ALSA: fireface: fix memory leak in ff400_switch_fetching_mode()

An allocated memory forgets to be released.

Fixes: 76fdb3a9e13 ('ALSA: fireface: add support for Fireface 400')
Cc: <stable@vger.kernel.org> # 4.12+
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 6 insertions, 3 deletions

diff --git a/sound/firewire/fireface/ff-protocol-ff400.c b/sound/firewire/fireface/ff-protocol-ff400.c
index ad7a0a32557d..64c3cb0fb926 100644
--- a/sound/firewire/fireface/ff-protocol-ff400.c
+++ b/sound/firewire/fireface/ff-protocol-ff400.c
@@ -146,6 +146,7 @@ static int ff400_switch_fetching_mode(struct snd_ff *ff, bool enable)
 {
         __le32 *reg;
         int i;
+        int err;
 
         reg = kcalloc(18, sizeof(__le32), GFP_KERNEL);
         if (reg == NULL)
@@ -163,9 +164,11 @@ static int ff400_switch_fetching_mode(struct snd_ff *ff, bool enable)
                         reg[i] = cpu_to_le32(0x00000001);
         }
 
-        return snd_fw_transaction(ff->unit, TCODE_WRITE_BLOCK_REQUEST,
-                                  FF400_FETCH_PCM_FRAMES, reg,
-                                  sizeof(__le32) * 18, 0);
+        err = snd_fw_transaction(ff->unit, TCODE_WRITE_BLOCK_REQUEST,
+                                 FF400_FETCH_PCM_FRAMES, reg,
+                                 sizeof(__le32) * 18, 0);
+        kfree(reg);
+        return err;
 }
 
 static void ff400_dump_sync_status(struct snd_ff *ff,