lightnvm: pblk: remove checks on mempool alloc.

As part of the mempool audit on pblk, remove unnecessary mempool
allocation checks on mempools.

Reported-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index 215aadb..0da5886 100644 (file)
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -206,8 +206,6 @@ int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags,
 
        for (i = 0; i < nr_pages; i++) {
                page = mempool_alloc(pblk->page_bio_pool, flags);
-               if (!page)
-                       goto err;
 
                ret = bio_add_pc_page(q, bio, page, PBLK_EXPOSED_PAGE_SIZE, 0);
                if (ret != PBLK_EXPOSED_PAGE_SIZE) {
@@ -1653,8 +1651,6 @@ void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv,
        struct pblk_line_ws *line_ws;
 
        line_ws = mempool_alloc(pblk->gen_ws_pool, gfp_mask);
-       if (!line_ws)
-               return;
 
        line_ws->pblk = pblk;
        line_ws->line = line;

diff --git a/drivers/lightnvm/pblk-read.c b/drivers/lightnvm/pblk-read.c
index 402c732..d2b6e2a 100644 (file)
--- a/drivers/lightnvm/pblk-read.c
+++ b/drivers/lightnvm/pblk-read.c
@@ -168,10 +168,6 @@ static int pblk_fill_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd,
        DECLARE_COMPLETION_ONSTACK(wait);
 
        new_bio = bio_alloc(GFP_KERNEL, nr_holes);
-       if (!new_bio) {
-               pr_err("pblk: could not alloc read bio\n");
-               return NVM_IO_ERR;
-       }
 
        if (pblk_bio_add_pages(pblk, new_bio, GFP_KERNEL, nr_holes))
                goto err;
@@ -321,10 +317,6 @@ int pblk_submit_read(struct pblk *pblk, struct bio *bio)
        bitmap_zero(&read_bitmap, nr_secs);
 
        rqd = pblk_alloc_rqd(pblk, READ);
-       if (IS_ERR(rqd)) {
-               pr_err_ratelimited("pblk: not able to alloc rqd");
-               return NVM_IO_ERR;
-       }
 
        rqd->opcode = NVM_OP_PREAD;
        rqd->bio = bio;

diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c
index de52707..6b6b418 100644 (file)
--- a/drivers/lightnvm/pblk-recovery.c
+++ b/drivers/lightnvm/pblk-recovery.c
@@ -34,10 +34,6 @@ void pblk_submit_rec(struct work_struct *work)
                                                                max_secs);
 
        bio = bio_alloc(GFP_KERNEL, nr_rec_secs);
-       if (!bio) {
-               pr_err("pblk: not able to create recovery bio\n");
-               return;
-       }
 
        bio->bi_iter.bi_sector = 0;
        bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
@@ -85,11 +81,6 @@ int pblk_recov_setup_rq(struct pblk *pblk, struct pblk_c_ctx *c_ctx,
        int nr_entries = c_ctx->nr_valid + c_ctx->nr_padded;
 
        rec_rqd = pblk_alloc_rqd(pblk, WRITE);
-       if (IS_ERR(rec_rqd)) {
-               pr_err("pblk: could not create recovery req.\n");
-               return -ENOMEM;
-       }
-
        rec_ctx = nvm_rq_to_pdu(rec_rqd);
 
        /* Copy completion bitmap, but exclude the first X completed entries */
@@ -404,22 +395,18 @@ next_pad_rq:
        ppa_list = (void *)(meta_list) + pblk_dma_meta_size;
        dma_ppa_list = dma_meta_list + pblk_dma_meta_size;
 
-       rqd = pblk_alloc_rqd(pblk, WRITE);
-       if (IS_ERR(rqd)) {
-               ret = PTR_ERR(rqd);
-               goto fail_free_meta;
-       }
-
        bio = pblk_bio_map_addr(pblk, data, rq_ppas, rq_len,
                                                PBLK_VMALLOC_META, GFP_KERNEL);
        if (IS_ERR(bio)) {
                ret = PTR_ERR(bio);
-               goto fail_free_rqd;
+               goto fail_free_meta;
        }
 
        bio->bi_iter.bi_sector = 0; /* internal bio */
        bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 
+       rqd = pblk_alloc_rqd(pblk, WRITE);
+
        rqd->bio = bio;
        rqd->opcode = NVM_OP_PWRITE;
        rqd->flags = pblk_set_progr_mode(pblk, WRITE);
@@ -490,8 +477,6 @@ free_rq:
 
 fail_free_bio:
        bio_put(bio);
-fail_free_rqd:
-       pblk_free_rqd(pblk, rqd, WRITE);
 fail_free_meta:
        nvm_dev_dma_free(dev->parent, meta_list, dma_meta_list);
 fail_free_pad:
@@ -785,15 +770,9 @@ static int pblk_recov_l2p_from_oob(struct pblk *pblk, struct pblk_line *line)
        dma_addr_t dma_ppa_list, dma_meta_list;
        int done, ret = 0;
 
-       rqd = pblk_alloc_rqd(pblk, READ);
-       if (IS_ERR(rqd))
-               return PTR_ERR(rqd);
-
        meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, &dma_meta_list);
-       if (!meta_list) {
-               ret = -ENOMEM;
-               goto free_rqd;
-       }
+       if (!meta_list)
+               return -ENOMEM;
 
        ppa_list = (void *)(meta_list) + pblk_dma_meta_size;
        dma_ppa_list = dma_meta_list + pblk_dma_meta_size;
@@ -804,6 +783,8 @@ static int pblk_recov_l2p_from_oob(struct pblk *pblk, struct pblk_line *line)
                goto free_meta_list;
        }
 
+       rqd = pblk_alloc_rqd(pblk, READ);
+
        p.ppa_list = ppa_list;
        p.meta_list = meta_list;
        p.rqd = rqd;
@@ -832,8 +813,6 @@ out:
        kfree(data);
 free_meta_list:
        nvm_dev_dma_free(dev->parent, meta_list, dma_meta_list);
-free_rqd:
-       pblk_free_rqd(pblk, rqd, READ);
 
        return ret;
 }

diff --git a/drivers/lightnvm/pblk-write.c b/drivers/lightnvm/pblk-write.c
index 26c2b83..0fb8f26 100644 (file)
--- a/drivers/lightnvm/pblk-write.c
+++ b/drivers/lightnvm/pblk-write.c
@@ -111,10 +111,7 @@ static void pblk_end_w_fail(struct pblk *pblk, struct nvm_rq *rqd)
                ppa_list = &rqd->ppa_addr;
 
        recovery = mempool_alloc(pblk->rec_pool, GFP_ATOMIC);
-       if (!recovery) {
-               pr_err("pblk: could not allocate recovery context\n");
-               return;
-       }
+
        INIT_LIST_HEAD(&recovery->failed);
 
        bit = -1;
@@ -375,10 +372,7 @@ int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line)
        int ret;
 
        rqd = pblk_alloc_rqd(pblk, READ);
-       if (IS_ERR(rqd)) {
-               pr_err("pblk: cannot allocate write req.\n");
-               return PTR_ERR(rqd);
-       }
+
        m_ctx = nvm_rq_to_pdu(rqd);
        m_ctx->private = meta_line;
 
@@ -546,19 +540,12 @@ static int pblk_submit_write(struct pblk *pblk)
        if (!secs_to_flush && secs_avail < pblk->min_write_pgs)
                return 1;
 
-       rqd = pblk_alloc_rqd(pblk, WRITE);
-       if (IS_ERR(rqd)) {
-               pr_err("pblk: cannot allocate write req.\n");
-               return 1;
-       }
-
        bio = bio_alloc(GFP_KERNEL, pblk->max_write_pgs);
-       if (!bio) {
-               pr_err("pblk: cannot allocate write bio\n");
-               goto fail_free_rqd;
-       }
+
        bio->bi_iter.bi_sector = 0; /* internal bio */
        bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
+
+       rqd = pblk_alloc_rqd(pblk, WRITE);
        rqd->bio = bio;
 
        secs_to_sync = pblk_calc_secs_to_sync(pblk, secs_avail, secs_to_flush);
@@ -589,7 +576,6 @@ fail_free_bio:
        pblk_free_write_rqd(pblk, rqd);
 fail_put_bio:
        bio_put(bio);
-fail_free_rqd:
        pblk_free_rqd(pblk, rqd, WRITE);
 
        return 1;