From: Mitko Haralanov Date: Tue, 8 Dec 2015 22:10:12 +0000 (-0500) Subject: staging/rdma/hfi1: Detect SDMA transmission error early X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6a5464f2248594bcf92bd05beb341650f9e0f357;p=linux-beck.git 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 --- 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 */