Commit 2c003e8e authored by Jean Delvare's avatar Jean Delvare Committed by Jean Delvare
Browse files

i2c: Use put_user instead of copy_to_user where possible 



This speeds up the I2C_FUNCS ioctl by 5 to 8% in my tests.

Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
Laughed-at-by: default avatarMark M. Hoffman <mhoffman@lightlink.com>
parent 813e30e9

drivers/i2c/i2c-dev.c

+1 −2
Original line number Diff line number Diff line
@@ -193,8 +193,7 @@ static int i2cdev_ioctl(struct inode *inode, struct file *file, 
		return 0;

	case I2C_FUNCS:

		funcs = i2c_get_functionality(client->adapter);

		return (copy_to_user((unsigned long __user *)arg, &funcs,

		                     sizeof(unsigned long)))?-EFAULT:0;

		return put_user(funcs, (unsigned long __user *)arg);



	case I2C_RDWR:

		if (copy_from_user(&rdwr_arg,