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UBI: fastmap: avoid multiple be32_to_cpu() when unneccesary

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process_pool_aeb() does several times the be32_to_cpu(new_vh->vol_id)
operation. Create a temporary variable and do it once.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Boris Brezillon 2016-09-16 16:59:11 +02:00 committed by Richard Weinberger
parent 3f84e454eb
commit 4c368421bc
1 changed files with 4 additions and 4 deletions
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8
drivers/mtd/ubi/fastmap.c
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@ -370,24 +370,24 @@ static int process_pool_aeb(struct ubi_device *ubi, struct ubi_attach_info *ai,
struct ubi_vid_hdr *new_vh,
struct ubi_ainf_peb *new_aeb)
{
int vol_id = be32_to_cpu(new_vh->vol_id);
struct ubi_ainf_volume *av;
if (be32_to_cpu(new_vh->vol_id) == UBI_FM_SB_VOLUME_ID ||
be32_to_cpu(new_vh->vol_id) == UBI_FM_DATA_VOLUME_ID) {
if (vol_id == UBI_FM_SB_VOLUME_ID || vol_id == UBI_FM_DATA_VOLUME_ID) {
kmem_cache_free(ai->aeb_slab_cache, new_aeb);
return 0;
}
/* Find the volume this SEB belongs to */
av = ubi_find_av(ai, be32_to_cpu(new_vh->vol_id));
av = ubi_find_av(ai, vol_id);
if (!av) {
ubi_err(ubi, "orphaned volume in fastmap pool!");
kmem_cache_free(ai->aeb_slab_cache, new_aeb);
return UBI_BAD_FASTMAP;
}
ubi_assert(be32_to_cpu(new_vh->vol_id) == av->vol_id);
ubi_assert(vol_id == av->vol_id);
return update_vol(ubi, ai, av, new_vh, new_aeb);
}