linux-kernel - [PATCH 6/6] Handle possible bio_alloc failure in bounce buffer

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Date:	Tue, 14 Apr 2009 16:36:47 +0530
From:	Nikanth Karthikesan <knikanth@...e.de>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH 6/6] Handle possible bio_alloc failure in bounce buffer

Handle possible bio_alloc failure in bounce buffer.

Signed-off-by: Nikanth Karthikesan <knikanth@...e.de>

---

Index: linux-2.6/mm/bounce.c
===================================================================
--- linux-2.6.orig/mm/bounce.c
+++ linux-2.6/mm/bounce.c
@@ -202,6 +202,9 @@ static void __blk_queue_bounce(struct re
 			unsigned int cnt = (*bio_orig)->bi_vcnt;
 
 			bio = bio_alloc(GFP_NOIO, cnt);
+			if (unlikely(!bio))
+				panic("Unable to allocate bios\n");
+			
 			memset(bio->bi_io_vec, 0, cnt * sizeof(struct bio_vec));
 		}
 			


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