staging: fsl-dpaa2/eth: Check if notification rearm is successful

In case dpaa2_io_service_rearm() fails with an error other then
EBUSY, it will do so silently; add a check for this and a warning
message, as a failure here means we're unable to receive any
more traffic on the current cpu.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
index 6f009d1..f390de6 100644 (file)
--- a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
+++ b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
@@ -955,6 +955,8 @@ static int dpaa2_eth_poll(struct napi_struct *napi, int budget)
                        err = dpaa2_io_service_rearm(NULL, &ch->nctx);
                        cpu_relax();
                } while (err == -EBUSY);
+               WARN_ONCE(err, "CDAN notifications rearm failed on core %d",
+                         ch->nctx.desired_cpu);
        }
 
        ch->stats.frames += cleaned;