diff options
| author | Jani Nikula <jani.nikula@intel.com> | 2017-09-04 21:40:34 +0300 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2017-09-04 21:40:34 +0300 |
| commit | d149d6ae17197ce23e2cd6bc5fcdacf7b593e55e (patch) | |
| tree | 2fb8d66199080f6d7b41690f6e8616ccd79a1943 /drivers/lightnvm/pblk-read.c | |
| parent | afe722bee4bf8afc88c6ff7d6f781515d9428595 (diff) | |
| parent | 7846b12fe0b5feab5446d892f41b5140c1419109 (diff) | |
| download | linux-d149d6ae17197ce23e2cd6bc5fcdacf7b593e55e.tar.bz2 | |
Merge drm-upstream/drm-next into drm-intel-next-queued
Catch up with upstream while it's easy.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/lightnvm/pblk-read.c')
| -rw-r--r-- | drivers/lightnvm/pblk-read.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/drivers/lightnvm/pblk-read.c b/drivers/lightnvm/pblk-read.c index 4e5c48f3de62..d682e89e6493 100644 --- a/drivers/lightnvm/pblk-read.c +++ b/drivers/lightnvm/pblk-read.c @@ -26,7 +26,7 @@ */ static int pblk_read_from_cache(struct pblk *pblk, struct bio *bio, sector_t lba, struct ppa_addr ppa, - int bio_iter) + int bio_iter, bool advanced_bio) { #ifdef CONFIG_NVM_DEBUG /* Callers must ensure that the ppa points to a cache address */ @@ -34,7 +34,8 @@ static int pblk_read_from_cache(struct pblk *pblk, struct bio *bio, BUG_ON(!pblk_addr_in_cache(ppa)); #endif - return pblk_rb_copy_to_bio(&pblk->rwb, bio, lba, ppa, bio_iter); + return pblk_rb_copy_to_bio(&pblk->rwb, bio, lba, ppa, + bio_iter, advanced_bio); } static void pblk_read_ppalist_rq(struct pblk *pblk, struct nvm_rq *rqd, @@ -44,7 +45,7 @@ static void pblk_read_ppalist_rq(struct pblk *pblk, struct nvm_rq *rqd, struct ppa_addr ppas[PBLK_MAX_REQ_ADDRS]; sector_t blba = pblk_get_lba(bio); int nr_secs = rqd->nr_ppas; - int advanced_bio = 0; + bool advanced_bio = false; int i, j = 0; /* logic error: lba out-of-bounds. Ignore read request */ @@ -62,19 +63,26 @@ static void pblk_read_ppalist_rq(struct pblk *pblk, struct nvm_rq *rqd, retry: if (pblk_ppa_empty(p)) { WARN_ON(test_and_set_bit(i, read_bitmap)); - continue; + + if (unlikely(!advanced_bio)) { + bio_advance(bio, (i) * PBLK_EXPOSED_PAGE_SIZE); + advanced_bio = true; + } + + goto next; } /* Try to read from write buffer. The address is later checked * on the write buffer to prevent retrieving overwritten data. */ if (pblk_addr_in_cache(p)) { - if (!pblk_read_from_cache(pblk, bio, lba, p, i)) { + if (!pblk_read_from_cache(pblk, bio, lba, p, i, + advanced_bio)) { pblk_lookup_l2p_seq(pblk, &p, lba, 1); goto retry; } WARN_ON(test_and_set_bit(i, read_bitmap)); - advanced_bio = 1; + advanced_bio = true; #ifdef CONFIG_NVM_DEBUG atomic_long_inc(&pblk->cache_reads); #endif @@ -83,6 +91,7 @@ retry: rqd->ppa_list[j++] = p; } +next: if (advanced_bio) bio_advance(bio, PBLK_EXPOSED_PAGE_SIZE); } @@ -282,7 +291,7 @@ retry: * write buffer to prevent retrieving overwritten data. */ if (pblk_addr_in_cache(ppa)) { - if (!pblk_read_from_cache(pblk, bio, lba, ppa, 0)) { + if (!pblk_read_from_cache(pblk, bio, lba, ppa, 0, 1)) { pblk_lookup_l2p_seq(pblk, &ppa, lba, 1); goto retry; } |