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block: Use bdrv_nb_sectors() in bdrv_aligned_preadv() 

Instead of bdrv_getlength().  Eliminate variable len.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Markus Armbruster 2014-06-26 13:23:19 +02:00 committed by Kevin Wolf
parent d32f7c101b
commit 4049082c4b
1 changed files with 4 additions and 5 deletions
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block.c
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@ -3055,15 +3055,14 @@ static int coroutine_fn bdrv_aligned_preadv(BlockDriverState *bs,
ret = drv->bdrv_co_readv(bs, sector_num, nb_sectors, qiov);
} else {
/* Read zeros after EOF of growable BDSes */
int64_t len, total_sectors, max_nb_sectors;
int64_t total_sectors, max_nb_sectors;
len = bdrv_getlength(bs);
if (len < 0) {
ret = len;
total_sectors = bdrv_nb_sectors(bs);
if (total_sectors < 0) {
ret = total_sectors;
goto out;
}
total_sectors = DIV_ROUND_UP(len, BDRV_SECTOR_SIZE);
max_nb_sectors = ROUND_UP(MAX(0, total_sectors - sector_num),
align >> BDRV_SECTOR_BITS);
if (max_nb_sectors > 0) {