[Qemu-devel] [PATCH] remove dead code in bdrv_check_request

[Christoph Hellwig <hch@lst.de>]

Remove code dealing with negative sector numbers for byte access in
bdrv_check_request as sector numbers can't ever be negative.

Previously we supported negative sector counts for byte access, but
never sector numbers.


Signed-off-by: Christoph Hellwig <hch@lst.de>

Index: qemu/block.c
===================================================================
--- qemu.orig/block.c	2009-03-14 14:34:49.000000000 +0100
+++ qemu/block.c	2009-03-14 14:35:12.000000000 +0100
@@ -546,15 +546,7 @@ static int bdrv_check_byte_request(Block
 static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num,
                               int nb_sectors)
 {
-    int64_t offset;
-
-    /* Deal with byte accesses */
-    if (sector_num < 0)
-        offset = -sector_num;
-    else
-        offset = sector_num * 512;
-
-    return bdrv_check_byte_request(bs, offset, nb_sectors * 512);
+    return bdrv_check_byte_request(bs, sector_num * 512, nb_sectors * 512);
 }
 
 /* return < 0 if error. See bdrv_write() for the return codes */