From 1762742f3fd276570456eb669922e34e11bd98b7 Mon Sep 17 00:00:00 2001
From: Nicholas Bellinger <nab@linux-iscsi.org>
Date: Fri, 27 Mar 2015 23:15:04 -0700
Subject: [PATCH] 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>
---
drivers/target/target_core_rd.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
index 98e83ac5661bcf..bedd4a18b3cae4 100644
--- a/drivers/target/target_core_rd.c
+++ b/drivers/target/target_core_rd.c
@@ -419,7 +419,8 @@ rd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
data_direction == DMA_FROM_DEVICE ? "Read" : "Write",
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 scatterlist *prot_sg;
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);
- 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 scatterlist *prot_sg;
u32 sectors = cmd->data_length / se_dev->dev_attrib.block_size;
--
GitLab