diff options
| author | Mike Marciniszyn <mike.marciniszyn@intel.com> | 2017-06-22 22:01:10 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-07-11 17:47:16 +0300 |
| commit | e7d80c830489f67b1d0257e6919840100085dea9 (patch) | |
| tree | 5df2d23b60518578edff162ee371ba3a644ee409 | |
| parent | 8e959601996dc645f4ed7004482a1667c27deb39 (diff) | |
| download | linux-e7d80c830489f67b1d0257e6919840100085dea9.tar.xz | |
IB/iser: Handle lack of memory management extentions correctly
max_fast_reg_page_list_len is only valid when the
memory management extentions are signaled by the underlying
driver.
Fix by adjusting iser_calc_scsi_params() to use
ISCSI_ISER_MAX_SG_TABLESIZE when the extentions are not indicated.
Reported-by: Thomas Rosenstein <thomas.rosenstein@creamfinance.com>
Fixes: Commit df749cdc45d9 ("IB/iser: Support up to 8MB data transfer in a single command")
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Tested-by: Thomas Rosenstein <thomas.rosenstein@creamfinance.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
| -rw-r--r-- | drivers/infiniband/ulp/iser/iser_verbs.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c index c538a38c91ce..26a004e97ae0 100644 --- a/drivers/infiniband/ulp/iser/iser_verbs.c +++ b/drivers/infiniband/ulp/iser/iser_verbs.c @@ -708,8 +708,14 @@ iser_calc_scsi_params(struct iser_conn *iser_conn, unsigned short sg_tablesize, sup_sg_tablesize; sg_tablesize = DIV_ROUND_UP(max_sectors * 512, SIZE_4K); - sup_sg_tablesize = min_t(unsigned, ISCSI_ISER_MAX_SG_TABLESIZE, - device->ib_device->attrs.max_fast_reg_page_list_len); + if (device->ib_device->attrs.device_cap_flags & + IB_DEVICE_MEM_MGT_EXTENSIONS) + sup_sg_tablesize = + min_t( + uint, ISCSI_ISER_MAX_SG_TABLESIZE, + device->ib_device->attrs.max_fast_reg_page_list_len); + else + sup_sg_tablesize = ISCSI_ISER_MAX_SG_TABLESIZE; iser_conn->scsi_sg_tablesize = min(sg_tablesize, sup_sg_tablesize); } |