ALSA: usb-audio: Use kmemdup rather than duplicating its implementation

Use kmemdup rather than duplicating its implementation

The semantic patch that makes this change is available
in scripts/coccinelle/api/memdup.cocci.

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 2e5bc73..a3ddac0 100644 (file)
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -137,12 +137,12 @@ static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
                return -ENOMEM;
        }
        if (fp->nr_rates > 0) {
-               rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
+               rate_table = kmemdup(fp->rate_table,
+                                    sizeof(int) * fp->nr_rates, GFP_KERNEL);
                if (!rate_table) {
                        kfree(fp);
                        return -ENOMEM;
                }
-               memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
                fp->rate_table = rate_table;
        }
 
@@ -224,10 +224,9 @@ static int create_uaxx_quirk(struct snd_usb_audio *chip,
        if (altsd->bNumEndpoints != 1)
                return -ENXIO;
 
-       fp = kmalloc(sizeof(*fp), GFP_KERNEL);
+       fp = kmemdup(&ua_format, sizeof(*fp), GFP_KERNEL);
        if (!fp)
                return -ENOMEM;
-       memcpy(fp, &ua_format, sizeof(*fp));
 
        fp->iface = altsd->bInterfaceNumber;
        fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;