[ALSA] usb-audio - Add a proper error check

The error in check_hw_params_convention() has to be checked and
handled properly.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index f48838a..5c40c03 100644 (file)
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -1762,8 +1762,10 @@ static int check_hw_params_convention(struct snd_usb_substream *subs)
 
        channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
        rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
-       if (!channels || !rates)
+       if (!channels || !rates) {
+               err = -ENOMEM;
                goto __out;
+       }
 
        list_for_each(p, &subs->fmt_list) {
                struct audioformat *f;
@@ -1916,7 +1918,10 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre
                                     1000 * MIN_PACKS_URB,
                                     /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
 
-       if (check_hw_params_convention(subs)) {
+       err = check_hw_params_convention(subs);
+       if (err < 0)
+               return err;
+       else if (err) {
                hwc_debug("setting extra hw constraints...\n");
                if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
                                               hw_rule_rate, subs,