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| author | Rahul Pathak <rpathak@visteon.com> | 2015-12-11 05:40:51 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-01-25 03:45:09 (GMT) |
| commit | 73a02d32458ecff5b6241e7e7bd6445f70400bad (patch) | |
| tree | 672ef20a15ed376922c912593be4ee5e3f47a04a /drivers/usb | |
| parent | 64f10edf0751727154e843e8bcf59fb659e579a2 (diff) | |
| download | linux-73a02d32458ecff5b6241e7e7bd6445f70400bad.tar.xz | |
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 <rpathak@visteon.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/core/devio.c | 9 |
1 files 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++) { |