Merge tag 'usb-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB/PHY updates from Greg KH:
 "Here is the big patchset of USB and PHY driver updates for 4.13-rc1.

  On the PHY side, they decided to move files around to "make things
  easier" in their tree. Hopefully that wasn't a mistake, but in
  linux-next testing, we haven't had any reported problems.

  There's the usual set of gadget and xhci and musb updates in here as
  well, along with a number of smaller updates for a raft of different
  USB drivers. Full details in the shortlog, nothing really major.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'usb-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (173 commits)
  Add USB quirk for HVR-950q to avoid intermittent device resets
  USB hub_probe: rework ugly goto-into-compound-statement
  usb: host: ohci-pxa27x: Handle return value of clk_prepare_enable
  USB: serial: cp210x: add ID for CEL EM3588 USB ZigBee stick
  usbip: Fix uninitialized variable bug in vhci
  usb: core: read USB ports from DT in the usbport LED trigger driver
  dt-bindings: leds: document new trigger-sources property
  usb: typec: ucsi: Add ACPI driver
  usb: typec: Add support for UCSI interface
  usb: musb: compress return logic into one line
  USB: serial: propagate late probe errors
  USB: serial: refactor port endpoint setup
  usb: musb: tusb6010_omap: Convert to DMAengine API
  ARM: OMAP2+: DMA: Add slave map entries for 24xx external request lines
  usb: musb: tusb6010: Handle DMA TX completion in DMA callback as well
  usb: musb: tusb6010_omap: Allocate DMA channels upfront
  usb: musb: tusb6010_omap: Create new struct for DMA data/parameters
  usb: musb: tusb6010_omap: Use one musb_ep_select call in tusb_omap_dma_program
  usb: musb: tusb6010: Add MUSB_G_NO_SKB_RESERVE to quirks
  usb: musb: Add quirk to avoid skb reserve in gadget mode
  ...

1 files changed, 4 insertions, 13 deletions

diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 08669fee6d7f..8f972247b1c1 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -361,17 +361,9 @@ static ssize_t wdm_write
 	if (we < 0)
 		return usb_translate_errors(we);
 
-	buf = kmalloc(count, GFP_KERNEL);
-	if (!buf) {
-		rv = -ENOMEM;
-		goto outnl;
-	}
-
-	r = copy_from_user(buf, buffer, count);
-	if (r > 0) {
-		rv = -EFAULT;
-		goto out_free_mem;
-	}
+	buf = memdup_user(buffer, count);
+	if (IS_ERR(buf))
+		return PTR_ERR(buf);
 
 	/* concurrent writes and disconnect */
 	r = mutex_lock_interruptible(&desc->wlock);
@@ -441,8 +433,7 @@ static ssize_t wdm_write
 
 	usb_autopm_put_interface(desc->intf);
 	mutex_unlock(&desc->wlock);
-outnl:
-	return rv < 0 ? rv : count;
+	return count;
 
 out_free_mem_pm:
 	usb_autopm_put_interface(desc->intf);