4.4-stable review patch. If anyone has any objections, please let me know.
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From: Sagi Grimberg sagi@grimberg.me
commit 24c3456c8d5ee6fc1933ca40f7b4406130682668 upstream.
If for some reason we failed to query the mr status, we need to make sure to provide sufficient information for an ambiguous error (guard error on sector 0).
Fixes: 0a7a08ad6f5f ("IB/iser: Implement check_protection") Cc: stable@vger.kernel.org Reported-by: Dan Carpenter dan.carpenter@oracle.com Signed-off-by: Sagi Grimberg sagi@grimberg.me Signed-off-by: Jason Gunthorpe jgg@mellanox.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/infiniband/ulp/iser/iser_verbs.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)
--- a/drivers/infiniband/ulp/iser/iser_verbs.c +++ b/drivers/infiniband/ulp/iser/iser_verbs.c @@ -1289,7 +1289,9 @@ u8 iser_check_task_pi_status(struct iscs IB_MR_CHECK_SIG_STATUS, &mr_status); if (ret) { pr_err("ib_check_mr_status failed, ret %d\n", ret); - goto err; + /* Not a lot we can do, return ambiguous guard error */ + *sector = 0; + return 0x1; }
if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { @@ -1317,7 +1319,4 @@ u8 iser_check_task_pi_status(struct iscs }
return 0; -err: - /* Not alot we can do here, return ambiguous guard error */ - return 0x1; }