From 6a5464f2248594bcf92bd05beb341650f9e0f357 Mon Sep 17 00:00:00 2001 From: Mitko Haralanov Date: Tue, 8 Dec 2015 17:10:12 -0500 Subject: [PATCH] staging/rdma/hfi1: Detect SDMA transmission error early It is possible for an SDMA transmission error to happen during the processing of an user SDMA transfer. In that case it is better to detect it early and abort any further attempts to send more packets. Reviewed-by: Ira Weiny Signed-off-by: Mitko Haralanov Signed-off-by: Greg Kroah-Hartman --- drivers/staging/rdma/hfi1/user_sdma.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/staging/rdma/hfi1/user_sdma.c b/drivers/staging/rdma/hfi1/user_sdma.c index d03c810b6206..d3de771a0770 100644 --- a/drivers/staging/rdma/hfi1/user_sdma.c +++ b/drivers/staging/rdma/hfi1/user_sdma.c @@ -774,6 +774,12 @@ static int user_sdma_send_pkts(struct user_sdma_request *req, unsigned maxpkts) pq = req->pq; + /* If tx completion has reported an error, we are done. */ + if (test_bit(SDMA_REQ_HAS_ERROR, &req->flags)) { + set_bit(SDMA_REQ_DONE_ERROR, &req->flags); + return -EFAULT; + } + /* * Check if we might have sent the entire request already */ -- 2.30.2