[PATCH] esp janitor work

o check request_region result o handle failure gracefully

[PATCH] esp janitor work
o check request_region result o handle failure gracefully
19afe6c2 · Dave Jones · Linus Torvalds · 049cbf98 · 19afe6c2
Commit 19afe6c2 authored May 30, 2002 by Dave Jones Committed by Linus Torvalds May 30, 2002
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Showing with 6 additions and 2 deletions

drivers/char/esp.c drivers/char/esp.c +6 -2

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--- a/drivers/char/esp.c
+++ b/drivers/char/esp.c
@@ -2476,9 +2476,13 @@ static _INLINE_ int autoconfig(struct esp_struct * info, int *region_start)
 			} else
 				*region_start = info->port;
-			request_region(*region_start,
+			if (!request_region(*region_start,
 				       info->port - *region_start + 8,
-				       "esp serial");
+				       "esp serial"))
+			{
+				restore_flags(flags);
+				return -EIO;
+			}
 			/* put card in enhanced mode */
 			/* this prevents access through */