linux-kernel - [git patches] libata fix

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Message-ID: <20100408165848.GA14360@havoc.gtf.org>
Date:	Thu, 8 Apr 2010 12:58:49 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linux-ide@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: [git patches] libata fix


Please pull from 'upstream-linus' branch of
master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev.git upstream-linus

to receive the following updates:

 include/linux/ata.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

Mark Lord (1):
      libata: Fix accesses at LBA28 boundary (old bug, but nasty) (v2)

diff --git a/include/linux/ata.h b/include/linux/ata.h
index b4c85e2..700c5b9 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -1025,8 +1025,8 @@ static inline int ata_ok(u8 status)
 
 static inline int lba_28_ok(u64 block, u32 n_block)
 {
-	/* check the ending block number */
-	return ((block + n_block) < ((u64)1 << 28)) && (n_block <= 256);
+	/* check the ending block number: must be LESS THAN 0x0fffffff */
+	return ((block + n_block) < ((1 << 28) - 1)) && (n_block <= 256);
 }
 
 static inline int lba_48_ok(u64 block, u32 n_block)
--
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