ALSA: pci/echoaudio: remove 'set but not used' warning

Fix W=1 warning. One variable is only used in a conditionally-compiled
block, mark as __maybe_unused

sound/pci/echoaudio/echoaudio.c: In function ‘snd_echo_probe’:
sound/pci/echoaudio/echoaudio.c:1958:6: warning: variable ‘i’ set but
not used [-Wunused-but-set-variable]
 1958 |  int i, err;
      |      ^

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200702193604.169059-7-pierre-louis.bossart@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/echoaudio/echoaudio.c b/sound/pci/echoaudio/echoaudio.c
index 0941a7a17623a49e987488e58327ad2488d6a788..bee3271e29daff1fa9c9a8e7cd5687043dbd6d3c 100644 (file)
--- a/sound/pci/echoaudio/echoaudio.c
+++ b/sound/pci/echoaudio/echoaudio.c
@@ -1955,7 +1955,8 @@ static int snd_echo_probe(struct pci_dev *pci,
        struct snd_card *card;
        struct echoaudio *chip;
        char *dsp;
-       int i, err;
+       __maybe_unused int i;
+       int err;
 
        if (dev >= SNDRV_CARDS)
                return -ENODEV;