patch-2.4.0-test8 linux/drivers/char/drm/fops.c

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diff -u --recursive --new-file v2.4.0-test7/linux/drivers/char/drm/fops.c linux/drivers/char/drm/fops.c
@@ -176,7 +176,8 @@
 		} else {
 			cur = DRM_MIN(send, dev->buf_end - dev->buf_rp);
 		}
-		copy_to_user_ret(buf, dev->buf_rp, cur, -EINVAL);
+		if (copy_to_user(buf, dev->buf_rp, cur))
+			return -EFAULT;
 		dev->buf_rp += cur;
 		if (dev->buf_rp == dev->buf_end) dev->buf_rp = dev->buf;
 		send -= cur;

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