V4L/DVB: IR/lirc: use memdup_user instead of copy_from_user

Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 3 insertions, 8 deletions

diff --git a/drivers/media/IR/ir-lirc-codec.c b/drivers/media/IR/ir-lirc-codec.c
index afb1ada36c78..ee1f2d443ab2 100644
--- a/drivers/media/IR/ir-lirc-codec.c
+++ b/drivers/media/IR/ir-lirc-codec.c
@@ -74,14 +74,9 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char *buf,
         if (count > LIRCBUF_SIZE || count % 2 == 0)
                 return -EINVAL;
 
-        txbuf = kzalloc(sizeof(int) * LIRCBUF_SIZE, GFP_KERNEL);
-        if (!txbuf)
-                return -ENOMEM;
-
-        if (copy_from_user(txbuf, buf, n)) {
-                ret = -EFAULT;
-                goto out;
-        }
+        txbuf = memdup_user(buf, n);
+        if (IS_ERR(txbuf))
+                return PTR_ERR(txbuf);
 
         ir_dev = lirc->ir_dev;
         if (!ir_dev) {