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[GIT,PULL,15/20] lightnvm: proper error handling for pblk_bio_add_pages

Message ID 20180528085841.26684-16-mb@lightnvm.io (mailing list archive)
State New, archived
Headers show

Commit Message

Matias Bjorling May 28, 2018, 8:58 a.m. UTC 
From: Igor Konopko <igor.j.konopko@intel.com>

Currently in case of error caused by bio_pc_add_page in
pblk_bio_add_pages two issues occur when calling from
pblk_rb_read_to_bio(). First one is in pblk_bio_free_pages, since we
are trying to free pages not allocated from our mempool. Second one
is the warn from dma_pool_free, that we are trying to free NULL
pointer dma.

This commit fix both issues.

Signed-off-by: Igor Konopko <igor.j.konopko@intel.com>
Signed-off-by: Marcin Dziegielewski <marcin.dziegielewski@intel.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
---
 drivers/lightnvm/pblk-core.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index e43093e27084..a20b41c355c5 100644
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -278,7 +278,9 @@  void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type)
 		return;
 	}
 
-	nvm_dev_dma_free(dev->parent, rqd->meta_list, rqd->dma_meta_list);
+	if (rqd->meta_list)
+		nvm_dev_dma_free(dev->parent, rqd->meta_list,
+				rqd->dma_meta_list);
 	mempool_free(rqd, pool);
 }
 
@@ -316,7 +318,7 @@  int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags,
 
 	return 0;
 err:
-	pblk_bio_free_pages(pblk, bio, 0, i - 1);
+	pblk_bio_free_pages(pblk, bio, (bio->bi_vcnt - i), i);
 	return -1;
 }