[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>
diff --git a/drivers/pcmcia/pcmcia_ioctl.c b/drivers/pcmcia/pcmcia_ioctl.c
index 310ede5..d077870 100644
--- a/drivers/pcmcia/pcmcia_ioctl.c
+++ b/drivers/pcmcia/pcmcia_ioctl.c
@@ -594,7 +594,12 @@
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: