esas2r: don't bother with __copy_to_user()

Al Viro · Al Viro · commit 3d3185ae593d · 2020-04-23T13:55:06.000-04:00
sure, we'd done copy_from_user() on the same range, so we can
skip access_ok()... and it's not worth bothering.  Just use
copy_to_user().

Signed-off-by: Al Viro &lt;viro@zeniv.linux.org.uk&gt;
diff --git a/drivers/scsi/esas2r/esas2r_ioctl.c b/drivers/scsi/esas2r/esas2r_ioctl.c
@@ -1510,7 +1510,7 @@ int esas2r_ioctl_handler(void *hostdata, unsigned int cmd, void __user *arg)
 	}
 
 	/* Always copy the buffer back, if only to pick up the status */
-	err = __copy_to_user(arg, ioctl, sizeof(struct atto_express_ioctl));
+	err = copy_to_user(arg, ioctl, sizeof(struct atto_express_ioctl));
 	if (err != 0) {
 		esas2r_log(ESAS2R_LOG_WARN,
 			   "ioctl_handler copy_to_user didn't copy everything (err %d, cmd %u)",

Original file line number	Diff line number	Diff line change
`@@ -1510,7 +1510,7 @@ int esas2r_ioctl_handler(void hostdata, unsigned int cmd, void __user arg)`
`1510`	`1510`	`}`
`1511`	`1511`
`1512`	`1512`	`/* Always copy the buffer back, if only to pick up the status */`
`1513`		`- err = __copy_to_user(arg, ioctl, sizeof(struct atto_express_ioctl));`
	`1513`	`+ err = copy_to_user(arg, ioctl, sizeof(struct atto_express_ioctl));`
`1514`	`1514`	`if (err != 0) {`
`1515`	`1515`	`esas2r_log(ESAS2R_LOG_WARN,`
`1516`	`1516`	`"ioctl_handler copy_to_user didn't copy everything (err %d, cmd %u)",`