ALSA: sound/isa: use memdup_user()

Remove open-coded memdup_user().

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 10 insertions, 9 deletions

diff --git a/sound/isa/sb/sb16_csp.c b/sound/isa/sb/sb16_csp.c
index 49037d074c71..bdc8dde4e4a2 100644
--- a/sound/isa/sb/sb16_csp.c
+++ b/sound/isa/sb/sb16_csp.c
@@ -684,15 +684,16 @@ static int snd_sb_csp_load(struct snd_sb_csp * p, const unsigned char *buf, int
  
 static int snd_sb_csp_load_user(struct snd_sb_csp * p, const unsigned char __user *buf, int size, int load_flags)
 {
-        int err = -ENOMEM;
-        unsigned char *kbuf = kmalloc(size, GFP_KERNEL);
-        if (kbuf) {
-                if (copy_from_user(kbuf, buf, size))
-                        err = -EFAULT;
-                else
-                        err = snd_sb_csp_load(p, kbuf, size, load_flags);
-                kfree(kbuf);
-        }
+        int err;
+        unsigned char *kbuf;
+
+        kbuf = memdup_user(buf, size);
+        if (IS_ERR(kbuf))
+                return PTR_ERR(kbuf);
+
+        err = snd_sb_csp_load(p, kbuf, size, load_flags);
+
+        kfree(kbuf);
         return err;
 }