staging/rdma/hfi1: Add a credit push on diagpkt allocate fail (d22f9d6b) · Commits · 戴 / test

When sending a diagnostic packet, if the send context does not have enough room, force a credit return and try again. Reviewed-by:

drivers/staging/rdma/hfi1/diag.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -379,6 +379,7 @@ static ssize_t diagpkt_send(struct diag_pkt *dp)
		pio_release_cb credit_cb = NULL;
		void *credit_arg = NULL;
		struct diagpkt_wait *wait = NULL;
		int trycount = 0;

		dd = hfi1_lookup(dp->unit);
		if (!dd \|\| !(dd->flags & HFI1_PRESENT) \|\| !dd->kregbase) {
		@@ -493,8 +494,15 @@ static ssize_t diagpkt_send(struct diag_pkt *dp)
		credit_arg = wait;
		}

		retry:
		pbuf = sc_buffer_alloc(sc, total_len, credit_cb, credit_arg);
		if (!pbuf) {
		if (trycount == 0) {
		/* force a credit return and try again */
		sc_return_credits(sc);
		trycount = 1;
		goto retry;
		}
		/*
		* No send buffer means no credit callback. Undo
		* the wait set-up that was done above. We free wait