From 73a02d32458ecff5b6241e7e7bd6445f70400bad Mon Sep 17 00:00:00 2001 From: Rahul Pathak Date: Fri, 11 Dec 2015 05:40:51 +0000 Subject: [PATCH] usb: Use memdup_user to reuse the code Fixing coccicheck warning which recommends to use memdup_user instead to reimplement its code, using memdup_user simplifies the code ./drivers/usb/core/devio.c:1398:11-18: WARNING opportunity for memdup_user Signed-off-by: Rahul Pathak Acked-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/devio.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index 6aac242..054eb53 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -1378,11 +1378,10 @@ static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb number_of_packets = uurb->number_of_packets; isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * number_of_packets; - isopkt = kmalloc(isofrmlen, GFP_KERNEL); - if (!isopkt) - return -ENOMEM; - if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { - ret = -EFAULT; + isopkt = memdup_user(iso_frame_desc, isofrmlen); + if (IS_ERR(isopkt)) { + ret = PTR_ERR(isopkt); + isopkt = NULL; goto error; } for (totlen = u = 0; u < number_of_packets; u++) { -- 2.7.4