This is a note to let you know that I've just added the patch titled
IB/SRP: Avoid using IB_MR_TYPE_SG_GAPS
to the 4.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ib-srp-avoid-using-ib_mr_type_sg_gaps.patch
and it can be found in the queue-4.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d6c58dc40fec35ff6cdb350b53bce0fcf9143709 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
Date: Tue, 14 Feb 2017 10:56:29 -0800
Subject: IB/SRP: Avoid using IB_MR_TYPE_SG_GAPS
From: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
commit d6c58dc40fec35ff6cdb350b53bce0fcf9143709 upstream.
Tests have shown that the following error message is reported when
using SG-GAPS registration with an mlx5 adapter:
scsi host1: ib_srp: failed RECV status WR flushed (5) for CQE ffff880bd4270eb0
00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
00000000 0f007806 2500002a ad9fafd1
scsi host1: ib_srp: reconnect succeeded
mlx5_0:dump_cqe:262:(pid 7369): dump error cqe
00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
00000000 0f007806 25000032 00105dd0
scsi host1: ib_srp: failed FAST REG status memory management operation error (6) for CQE ffff880b92860138
Hence avoid using SG-GAPS memory registrations. Additionally,
always configure the blk_queue_virt_boundary() to avoid to trigger
a mapping failure when using adapters that support SG-GAPS (e.g.
mlx5).
Fixes: commit ad8e66b4a801 ("IB/srp: fix mr allocation when the device supports sg gaps")
Fixes: commit 509c5f33f4f6 ("IB/srp: Prevent mapping failures")
Reported-by: Laurence Oberman <loberman@xxxxxxxxxx>
Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
Cc: Israel Rukshin <israelr@xxxxxxxxxxxx>
Cc: Max Gurtovoy <maxg@xxxxxxxxxxxx>
Cc: Leon Romanovsky <leonro@xxxxxxxxxxxx>
Cc: Mark Bloch <markb@xxxxxxxxxxxx>
Cc: Yuval Shaia <yuval.shaia@xxxxxxxxxx>
Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/ulp/srp/ib_srp.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -371,7 +371,6 @@ static struct srp_fr_pool *srp_create_fr
struct srp_fr_desc *d;
struct ib_mr *mr;
int i, ret = -EINVAL;
- enum ib_mr_type mr_type;
if (pool_size <= 0)
goto err;
@@ -385,13 +384,9 @@ static struct srp_fr_pool *srp_create_fr
spin_lock_init(&pool->lock);
INIT_LIST_HEAD(&pool->free_list);
- if (device->attrs.device_cap_flags & IB_DEVICE_SG_GAPS_REG)
- mr_type = IB_MR_TYPE_SG_GAPS;
- else
- mr_type = IB_MR_TYPE_MEM_REG;
-
for (i = 0, d = &pool->desc[0]; i < pool->size; i++, d++) {
- mr = ib_alloc_mr(pd, mr_type, max_page_list_len);
+ mr = ib_alloc_mr(pd, IB_MR_TYPE_MEM_REG,
+ max_page_list_len);
if (IS_ERR(mr)) {
ret = PTR_ERR(mr);
if (ret == -ENOMEM)
@@ -2664,9 +2659,8 @@ static int srp_slave_alloc(struct scsi_d
struct Scsi_Host *shost = sdev->host;
struct srp_target_port *target = host_to_target(shost);
struct srp_device *srp_dev = target->srp_host->srp_dev;
- struct ib_device *ibdev = srp_dev->dev;
- if (!(ibdev->attrs.device_cap_flags & IB_DEVICE_SG_GAPS_REG))
+ if (true)
blk_queue_virt_boundary(sdev->request_queue,
~srp_dev->mr_page_mask);
Patches currently in stable-queue which might be from bart.vanassche@xxxxxxxxxxx are
queue-4.10/ib-srp-avoid-that-duplicate-responses-trigger-a-kernel-bug.patch
queue-4.10/ib-srp-fix-race-conditions-related-to-task-management.patch
queue-4.10/ib-srp-avoid-using-ib_mr_type_sg_gaps.patch