linux-kernel - [PATCH 09/15] usb: misc: iowarrior: update to use the usb_control_msg

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Date:   Sun, 29 Nov 2020 21:36:06 +0530
From:   Anant Thazhemadam <anant.thazhemadam@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Lee Jones <lee.jones@...aro.org>,
        Anant Thazhemadam <anant.thazhemadam@...il.com>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 09/15] usb: misc: iowarrior: update to use the usb_control_msg_{send|recv}() API

The newer usb_control_msg_{send|recv}() API are an improvement on the
existing usb_control_msg() as it ensures that a short read/write is treated
as an error, data can be used off the stack, and raw usb pipes need not be
created in the calling functions.
For this reason, instances of usb_control_msg() have been replaced with
usb_control_msg_{recv|send}() appropriately.

Signed-off-by: Anant Thazhemadam <anant.thazhemadam@...il.com>
---
 drivers/usb/misc/iowarrior.c | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c
index 70ec29681526..53726fffe5df 100644
--- a/drivers/usb/misc/iowarrior.c
+++ b/drivers/usb/misc/iowarrior.c
@@ -109,12 +109,12 @@ static int usb_get_report(struct usb_device *dev,
 			  struct usb_host_interface *inter, unsigned char type,
 			  unsigned char id, void *buf, int size)
 {
-	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
-			       USB_REQ_GET_REPORT,
-			       USB_DIR_IN | USB_TYPE_CLASS |
-			       USB_RECIP_INTERFACE, (type << 8) + id,
-			       inter->desc.bInterfaceNumber, buf, size,
-			       GET_TIMEOUT*HZ);
+	return usb_control_msg_recv(dev, 0,
+				    USB_REQ_GET_REPORT,
+				    USB_DIR_IN | USB_TYPE_CLASS |
+				    USB_RECIP_INTERFACE, (type << 8) + id,
+				    inter->desc.bInterfaceNumber, buf, size,
+				    GET_TIMEOUT*HZ, GFP_KERNEL);
 }
 //#endif
 
@@ -123,13 +123,13 @@ static int usb_get_report(struct usb_device *dev,
 static int usb_set_report(struct usb_interface *intf, unsigned char type,
 			  unsigned char id, void *buf, int size)
 {
-	return usb_control_msg(interface_to_usbdev(intf),
-			       usb_sndctrlpipe(interface_to_usbdev(intf), 0),
-			       USB_REQ_SET_REPORT,
-			       USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-			       (type << 8) + id,
-			       intf->cur_altsetting->desc.bInterfaceNumber, buf,
-			       size, HZ);
+	return usb_control_msg_send(interface_to_usbdev(intf),
+				    0,
+				    USB_REQ_SET_REPORT,
+				    USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+				    (type << 8) + id,
+				    intf->cur_altsetting->desc.bInterfaceNumber, buf,
+				    size, HZ, GFP_KERNEL);
 }
 
 /*---------------------*/
@@ -854,10 +854,10 @@ static int iowarrior_probe(struct usb_interface *interface,
 
 	/* Set the idle timeout to 0, if this is interface 0 */
 	if (dev->interface->cur_altsetting->desc.bInterfaceNumber == 0) {
-	    usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
-			    0x0A,
-			    USB_TYPE_CLASS | USB_RECIP_INTERFACE, 0,
-			    0, NULL, 0, USB_CTRL_SET_TIMEOUT);
+		usb_control_msg_send(udev, 0,
+				     0x0A,
+				     USB_TYPE_CLASS | USB_RECIP_INTERFACE, 0,
+				     0, NULL, 0, USB_CTRL_SET_TIMEOUT, GFP_KERNEL);
 	}
 	/* allow device read and ioctl */
 	dev->present = 1;
-- 
2.25.1