From 7836a2d9803c6203d2922e7116307c9f0dfe87f9 Mon Sep 17 00:00:00 2001 From: Alexandre Bounine Date: Tue, 11 Oct 2016 13:53:49 -0700 Subject: [PATCH] rapidio/rio_cm: use memdup_user() instead of duplicating code Fix coccinelle warning about duplicating existing memdup_user function. Link: http://lkml.kernel.org/r/20160811151737.20140-1-alexandre.bounine@idt.com Link: https://lkml.org/lkml/2016/8/11/29 Signed-off-by: Alexandre Bounine Reported-by: kbuild test robot Cc: Matt Porter Cc: Andre van Herk Cc: Barry Wood Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/rapidio/rio_cm.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) diff --git a/drivers/rapidio/rio_cm.c b/drivers/rapidio/rio_cm.c index cebc296463ad..bad0e0ea4f30 100644 --- a/drivers/rapidio/rio_cm.c +++ b/drivers/rapidio/rio_cm.c @@ -1841,24 +1841,19 @@ static int cm_chan_msg_send(void __user *arg) { struct rio_cm_msg msg; void *buf; - int ret = 0; + int ret; if (copy_from_user(&msg, arg, sizeof(msg))) return -EFAULT; if (msg.size > RIO_MAX_MSG_SIZE) return -EINVAL; - buf = kmalloc(msg.size, GFP_KERNEL); - if (!buf) - return -ENOMEM; - - if (copy_from_user(buf, (void __user *)(uintptr_t)msg.msg, msg.size)) { - ret = -EFAULT; - goto out; - } + buf = memdup_user((void __user *)(uintptr_t)msg.msg, msg.size); + if (IS_ERR(buf)) + return PTR_ERR(buf); ret = riocm_ch_send(msg.ch_num, buf, msg.size); -out: + kfree(buf); return ret; } -- 2.20.1