@@ -37,13 +37,10 @@ static int isight_firmware_load(struct usb_interface *intf,
struct usb_device *dev = interface_to_usbdev(intf);
int llen, len, req, ret = 0;
const struct firmware *firmware;
- unsigned char *buf = kmalloc(50, GFP_KERNEL);
+ unsigned char buf[50];
unsigned char data[4];
const u8 *ptr;
- if (!buf)
- return -ENOMEM;
-
if (request_firmware(&firmware, "isight.fw", &dev->dev) != 0) {
printk(KERN_ERR "Unable to load isight firmware\n");
ret = -ENODEV;
@@ -53,11 +50,11 @@ static int isight_firmware_load(struct usb_interface *intf,
ptr = firmware->data;
buf[0] = 0x01;
- if (usb_control_msg
- (dev, usb_sndctrlpipe(dev, 0), 0xa0, 0x40, 0xe600, 0, buf, 1,
- 300) != 1) {
+ ret = usb_control_msg_send(dev, 0, 0xa0, 0x40, 0xe600,
+ 0, &buf, 1, 300, GFP_KERNEL);
+ if (ret != 0) {
printk(KERN_ERR
- "Failed to initialise isight firmware loader\n");
+ "Failed to initialise isight firmware loader\n");
ret = -ENODEV;
goto out;
}
@@ -82,15 +79,15 @@ static int isight_firmware_load(struct usb_interface *intf,
ret = -ENODEV;
goto out;
}
- memcpy(buf, ptr, llen);
+ memcpy(&buf, ptr, llen);
ptr += llen;
- if (usb_control_msg
- (dev, usb_sndctrlpipe(dev, 0), 0xa0, 0x40, req, 0,
- buf, llen, 300) != llen) {
+ ret = usb_control_msg_send(dev, 0, 0xa0, 0x40, req, 0,
+ &buf, llen, 300, GFP_KERNEL);
+ if (ret != 0) {
printk(KERN_ERR
- "Failed to load isight firmware\n");
+ "Failed to load isight firmware\n");
ret = -ENODEV;
goto out;
}
@@ -99,15 +96,14 @@ static int isight_firmware_load(struct usb_interface *intf,
}
buf[0] = 0x00;
- if (usb_control_msg
- (dev, usb_sndctrlpipe(dev, 0), 0xa0, 0x40, 0xe600, 0, buf, 1,
- 300) != 1) {
+ ret = usb_control_msg_send(dev, 0, 0xa0, 0x40, 0xe600,
+ 0, &buf, 1, 300, GFP_KERNEL);
+ if (ret != 0) {
printk(KERN_ERR "isight firmware loading completion failed\n");
ret = -ENODEV;
}
out:
- kfree(buf);
release_firmware(firmware);
return ret;
}
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, the instances of usb_control_msg() have been replaced with usb_control_msg_send(), and return value checking has also been appropriately enforced. Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com> --- drivers/usb/misc/isight_firmware.c | 30 +++++++++++++----------------- 1 file changed, 13 insertions(+), 17 deletions(-)