From: Mike Christie
mainline inclusion
from mainline-v5.12-rc1
commit 25c400db2083732a5fbdd72f0d3a0337119b2fa5
category: bugfix
issue: #I3ZXZF
CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
-----------------------------------------------
We are setting the shost's can_queue after we add the host which is too
late, because the SCSI midlayer will have allocated the tag set based on
the can_queue value at that time. This patch has us use the
iscsi_host_get_max_scsi_cmds() helper to figure out the number of SCSI
cmds.
It also fixes up the template can_queue so it reflects the max SCSI cmds we
can support like how other drivers work.
Link: https://lore.kernel.org/r/20210207044608.27585-7-michael.christie@oracle.com
Reviewed-by: Lee Duncan
Signed-off-by: Mike Christie
Signed-off-by: Martin K. Petersen
Signed-off-by: Ye Bin
Reviewed-by: Jason Yan
Signed-off-by: Chen Jun
Signed-off-by: Yu Changchun
---
drivers/scsi/iscsi_tcp.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index df47557a02a3..d39f812d9b92 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -847,6 +847,7 @@ iscsi_sw_tcp_session_create(struct iscsi_endpoint *ep, uint16_t cmds_max,
struct iscsi_session *session;
struct iscsi_sw_tcp_host *tcp_sw_host;
struct Scsi_Host *shost;
+ int rc;
if (ep) {
printk(KERN_ERR "iscsi_tcp: invalid ep %p.\n", ep);
@@ -864,6 +865,11 @@ iscsi_sw_tcp_session_create(struct iscsi_endpoint *ep, uint16_t cmds_max,
shost->max_channel = 0;
shost->max_cmd_len = SCSI_MAX_VARLEN_CDB_SIZE;
+ rc = iscsi_host_get_max_scsi_cmds(shost, cmds_max);
+ if (rc < 0)
+ goto free_host;
+ shost->can_queue = rc;
+
if (iscsi_host_add(shost, NULL))
goto free_host;
@@ -878,7 +884,6 @@ iscsi_sw_tcp_session_create(struct iscsi_endpoint *ep, uint16_t cmds_max,
tcp_sw_host = iscsi_host_priv(shost);
tcp_sw_host->session = session;
- shost->can_queue = session->scsi_cmds_max;
if (iscsi_tcp_r2tpool_alloc(session))
goto remove_session;
return cls_session;
@@ -981,7 +986,7 @@ static struct scsi_host_template iscsi_sw_tcp_sht = {
.name = "iSCSI Initiator over TCP/IP",
.queuecommand = iscsi_queuecommand,
.change_queue_depth = scsi_change_queue_depth,
- .can_queue = ISCSI_DEF_XMIT_CMDS_MAX - 1,
+ .can_queue = ISCSI_TOTAL_CMDS_MAX,
.sg_tablesize = 4096,
.max_sectors = 0xFFFF,
.cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
--
2.22.0
