[PATCH] pcmcia: handle __copy_from_user() return value in ioctl

Handle __copy_from_user() return value.

drivers/pcmcia/pcmcia_ioctl.c:597: warning: ignoring return value of '__copy_from_user', declared with attribute warn_unused_result

Noticed and first fix by Randy Dunlap.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/pcmcia/pcmcia_ioctl.c b/drivers/pcmcia/pcmcia_ioctl.c
index 310ede575caa..d077870c6731 100644
--- a/drivers/pcmcia/pcmcia_ioctl.c
+++ b/drivers/pcmcia/pcmcia_ioctl.c
@@ -594,7 +594,12 @@ static int ds_ioctl(struct inode * inode, struct file * file,
 
     err = ret = 0;
 
-    if (cmd & IOC_IN) __copy_from_user((char *)buf, uarg, size);
+    if (cmd & IOC_IN) {
+        if (__copy_from_user((char *)buf, uarg, size)) {
+            err = -EFAULT;
+            goto free_out;
+        }
+    }
 
     switch (cmd) {
     case DS_ADJUST_RESOURCE_INFO: