From: Sagi Grimberg <sagig@xxxxxxxxxxxx>
Need to take into account that protection sg_list
(cmd->t_prot_sg) may consist multiple entries.
Signed-off-by: Sagi Grimberg <sagig@xxxxxxxxxxxx>
---
drivers/target/target_core_sbc.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index 71f91ff..fac8c77 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -1147,12 +1147,19 @@ sbc_dif_copy_prot(struct se_cmd *cmd, unsigned int sectors, bool read,
struct scatterlist *psg;
void *paddr, *addr;
unsigned int i, len, left;
+ unsigned int offset = 0;
left = sectors * dev->prot_length;
for_each_sg(cmd->t_prot_sg, psg, cmd->t_prot_nents, i) {
len = min(psg->length, left);
+ if (offset >= sg->length) {
+ sg = sg_next(sg);
+ offset = 0;
+ sg_off = sg->offset;
+ }
+
paddr = kmap_atomic(sg_page(psg)) + psg->offset;
addr = kmap_atomic(sg_page(sg)) + sg_off;
@@ -1162,6 +1169,7 @@ sbc_dif_copy_prot(struct se_cmd *cmd, unsigned int sectors, bool read,
memcpy(addr, paddr, len);
left -= len;
+ offset += len;
kunmap_atomic(paddr);
kunmap_atomic(addr);
}
--
1.7.1
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