[SCSI] megaraid: Make megaraid_ioctl() check copy_to_user() return value

Check copy_to_user() return value in drivers/scsi/megaraid.c::megadev_ioctl()
This gets rid of this little warning:
  drivers/scsi/megaraid.c:3661: warning: ignoring return value of 'copy_to_user', declared with attribute warn_unused_result

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Acked-by: "Ju, Seokmann" <Seokmann.Ju@lsil.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c
index ccb0055ac73a..b87bef69ba0f 100644
--- a/drivers/scsi/megaraid.c
+++ b/drivers/scsi/megaraid.c
@@ -3656,8 +3656,9 @@ megadev_ioctl(struct inode *inode, struct file *filep, unsigned int cmd,
                          * Send the request sense data also, irrespective of
                          * whether the user has asked for it or not.
                          */
-                        copy_to_user(upthru->reqsensearea,
-                                        pthru->reqsensearea, 14);
+                        if (copy_to_user(upthru->reqsensearea,
+                                        pthru->reqsensearea, 14))
+                                rval = -EFAULT;
 
 freemem_and_return:
                         if( pthru->dataxferlen ) {