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ALSA: scarlett2: Zero initialize ret in scarlett2_ag_target_ctl_get()

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Clang warns (or errors with CONFIG_WERROR):

  sound/usb/mixer_scarlett2.c:3697:6: error: variable 'err' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized]
   3697 |         if (private->autogain_updated) {
        |             ^~~~~~~~~~~~~~~~~~~~~~~~~
  sound/usb/mixer_scarlett2.c:3707:9: note: uninitialized use occurs here
   3707 |         return err;
        |                ^~~
  sound/usb/mixer_scarlett2.c:3697:2: note: remove the 'if' if its condition is always true
   3697 |         if (private->autogain_updated) {
        |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  sound/usb/mixer_scarlett2.c:3688:9: note: initialize the variable 'err' to silence this warning
   3688 |         int err;
        |                ^
        |                 = 0
  1 error generated.

Initialize ret to zero to ensure ret is initialized in all paths within
scarlett2_ag_target_ctl_get(), which matches the style of other
functions in this driver.

Fixes: e30ea5340c25 ("ALSA: scarlett2: Add autogain target controls")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Message-ID: <20240419-alsa-scarlett2-fix-wsometimes-uninitialized-v1-1-e2ace8642e08@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Nathan Chancellor 2024-04-19 17:25:59 -07:00 committed by Takashi Iwai
parent 32cb23a0f9
commit 3a56855bb5
1 changed files with 1 additions and 1 deletions
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2
sound/usb/mixer_scarlett2.c
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@ -3685,7 +3685,7 @@ static int scarlett2_ag_target_ctl_get(
struct usb_mixer_elem_info *elem = kctl->private_data;
struct usb_mixer_interface *mixer = elem->head.mixer;
struct scarlett2_data *private = mixer->private_data;
int err;
int err = 0;
mutex_lock(&private->data_mutex);