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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/drivers/video/fbdev/core/fbcmap.c
..
..
@@ -285,11 +285,7 @@
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 		goto out;
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 	}
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 	umap.start = cmap->start;
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-	if (!lock_fb_info(info)) {
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-		rc = -ENODEV;
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-		goto out;
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-	}
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-
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+	lock_fb_info(info);
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 	rc = fb_set_cmap(&umap, info);
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 	unlock_fb_info(info);
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 out: