IB/srp: Sync buffer before posting send
srp_send_tsk_mgmt() was missing the proper DMA sync calls before posting
the buffer to the device.
Signed-off-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 9b4bc5a..cfc1d65 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -1442,6 +1442,7 @@
static int srp_send_tsk_mgmt(struct srp_target_port *target,
struct srp_request *req, u8 func)
{
+ struct ib_device *dev = target->srp_host->srp_dev->dev;
struct srp_iu *iu;
struct srp_tsk_mgmt *tsk_mgmt;
@@ -1459,6 +1460,8 @@
if (!iu)
goto out;
+ ib_dma_sync_single_for_cpu(dev, iu->dma, sizeof *tsk_mgmt,
+ DMA_TO_DEVICE);
tsk_mgmt = iu->buf;
memset(tsk_mgmt, 0, sizeof *tsk_mgmt);
@@ -1468,6 +1471,8 @@
tsk_mgmt->tsk_mgmt_func = func;
tsk_mgmt->task_tag = req->index;
+ ib_dma_sync_single_for_device(dev, iu->dma, sizeof *tsk_mgmt,
+ DMA_TO_DEVICE);
if (__srp_post_send(target, iu, sizeof *tsk_mgmt))
goto out;