From 7718cf03c3ce4b6ebd90107643ccd01c952a1fce Mon Sep 17 00:00:00 2001
From: Max Gurtovoy <maxg@mellanox.com>
Date: Wed, 25 Sep 2019 00:03:47 +0300
Subject: [PATCH 1/1] IB/iser: bound protection_sg size by data_sg size
Git-commit: 7718cf03c3ce4b6ebd90107643ccd01c952a1fce
Patch-mainline: v5.5-rc1
References: git-fixes
In case we don't set the sg_prot_tablesize, the scsi layer assign the
default size (65535 entries). We should limit this size since we should
take into consideration the underlaying device capability. This cap is
considered when calculating the sg_tablesize. Otherwise, for example,
we can get that /sys/block/sdb/queue/max_segments is 128 and
/sys/block/sdb/queue/max_integrity_segments is 65535.
Link: https://lore.kernel.org/r/1569359027-10987-1-git-send-email-maxg@mellanox.com
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Nicolas Morey <nmorey@suse.com>
---
drivers/infiniband/ulp/iser/iscsi_iser.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index 2e72fc5af157..c4c015c60446 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -646,6 +646,7 @@ iscsi_iser_session_create(struct iscsi_endpoint *ep,
if (ib_conn->pi_support) {
u32 sig_caps = ib_conn->device->ib_device->attrs.sig_prot_cap;
+ shost->sg_prot_tablesize = shost->sg_tablesize;
scsi_host_set_prot(shost, iser_dif_prot_caps(sig_caps));
scsi_host_set_guard(shost, SHOST_DIX_GUARD_IP |
SHOST_DIX_GUARD_CRC);
--
2.39.1.1.gbe015eda0162