isdn: return -EFAULT if copy_from_user() fails

We should be returning -EFAULT here.

Mostly this patch is to silence a smatch warning.  The upper levels
of this driver turn all non-zero return values from isar_load_firmware()
into 1.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/isdn/hisax/isar.c b/drivers/isdn/hisax/isar.c
index 1be4552d94b4..c9cd4d22b4a5 100644
--- a/drivers/isdn/hisax/isar.c
+++ b/drivers/isdn/hisax/isar.c
@@ -212,9 +212,9 @@ isar_load_firmware(struct IsdnCardState *cs, u_char __user *buf)
         cs->debug &= ~(L1_DEB_HSCX | L1_DEB_HSCX_FIFO);
 #endif
         
-        if ((ret = copy_from_user(&size, p, sizeof(int)))) {
+        if (copy_from_user(&size, p, sizeof(int))) {
                 printk(KERN_ERR"isar_load_firmware copy_from_user ret %d\n", ret);
-                return ret;
+                return -EFAULT;
         }
         p += sizeof(int);
         printk(KERN_DEBUG"isar_load_firmware size: %d\n", size);