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| author | James Morris <james.l.morris@oracle.com> | 2014-06-24 18:46:07 +1000 |
|---|---|---|
| committer | James Morris <james.l.morris@oracle.com> | 2014-06-24 18:46:07 +1000 |
| commit | f01387d2693813eb5271a3448e6a082322c7d75d (patch) | |
| tree | b591ca73c85276bae53d7db57ff1565be45a29da /drivers/target/target_core_rd.c | |
| parent | 92953ff38ba59b4f7b1a54ab28b84be35fafaecc (diff) | |
| parent | 1860e379875dfe7271c649058aeddffe5afd9d0d (diff) | |
Merge commit 'v3.15' into next
Diffstat (limited to 'drivers/target/target_core_rd.c')
| -rw-r--r-- | drivers/target/target_core_rd.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c index 66a5aba5a0d9..b920db3388cd 100644 --- a/drivers/target/target_core_rd.c +++ b/drivers/target/target_core_rd.c @@ -242,7 +242,7 @@ static void rd_release_prot_space(struct rd_dev *rd_dev) rd_dev->sg_prot_count = 0; } -static int rd_build_prot_space(struct rd_dev *rd_dev, int prot_length) +static int rd_build_prot_space(struct rd_dev *rd_dev, int prot_length, int block_size) { struct rd_dev_sg_table *sg_table; u32 total_sg_needed, sg_tables; @@ -252,8 +252,13 @@ static int rd_build_prot_space(struct rd_dev *rd_dev, int prot_length) if (rd_dev->rd_flags & RDF_NULLIO) return 0; - - total_sg_needed = rd_dev->rd_page_count / prot_length; + /* + * prot_length=8byte dif data + * tot sg needed = rd_page_count * (PGSZ/block_size) * + * (prot_length/block_size) + pad + * PGSZ canceled each other. + */ + total_sg_needed = (rd_dev->rd_page_count * prot_length / block_size) + 1; sg_tables = (total_sg_needed / max_sg_per_table) + 1; @@ -606,7 +611,8 @@ static int rd_init_prot(struct se_device *dev) if (!dev->dev_attrib.pi_prot_type) return 0; - return rd_build_prot_space(rd_dev, dev->prot_length); + return rd_build_prot_space(rd_dev, dev->prot_length, + dev->dev_attrib.block_size); } static void rd_free_prot(struct se_device *dev) |