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target/rd: Add checks for backend DIF emulation 

Make sure that RAMDISK only attempts to use backend DIF emulation
when it's actually enabled at device level.

Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2015-03-27 23:15:04 -07:00
parent 6f16ec43e0
commit 1762742f3f
1 changed files with 4 additions and 2 deletions
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6
drivers/target/target_core_rd.c
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@ -419,7 +419,8 @@ rd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
data_direction == DMA_FROM_DEVICE ? "Read" : "Write", data_direction == DMA_FROM_DEVICE ? "Read" : "Write",
cmd->t_task_lba, rd_size, rd_page, rd_offset); cmd->t_task_lba, rd_size, rd_page, rd_offset);
if (cmd->prot_type && data_direction == DMA_TO_DEVICE) { if (cmd->prot_type && se_dev->dev_attrib.pi_prot_type &&
data_direction == DMA_TO_DEVICE) {
struct rd_dev_sg_table *prot_table; struct rd_dev_sg_table *prot_table;
struct scatterlist *prot_sg; struct scatterlist *prot_sg;
u32 sectors = cmd->data_length / se_dev->dev_attrib.block_size; u32 sectors = cmd->data_length / se_dev->dev_attrib.block_size;
@ -502,7 +503,8 @@ rd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
} }
sg_miter_stop(&m); sg_miter_stop(&m);
if (cmd->prot_type && data_direction == DMA_FROM_DEVICE) { if (cmd->prot_type && se_dev->dev_attrib.pi_prot_type &&
data_direction == DMA_FROM_DEVICE) {
struct rd_dev_sg_table *prot_table; struct rd_dev_sg_table *prot_table;
struct scatterlist *prot_sg; struct scatterlist *prot_sg;
u32 sectors = cmd->data_length / se_dev->dev_attrib.block_size; u32 sectors = cmd->data_length / se_dev->dev_attrib.block_size;