can: xilinx_can: Add check for NAPI Poll function

Add check for NAPI poll function to avoid enabling interrupts
with out completing the NAPI call.

Link: https://lore.kernel.org/all/20220208162053.39896-1-srinivas.neeli@xilinx.com
Signed-off-by: Srinivas Neeli <srinivas.neeli@xilinx.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c
index 1674b56..e562c5a 100644 (file)
--- a/drivers/net/can/xilinx_can.c
+++ b/drivers/net/can/xilinx_can.c
@@ -1215,10 +1215,11 @@ static int xcan_rx_poll(struct napi_struct *napi, int quota)
        }
 
        if (work_done < quota) {
-               napi_complete_done(napi, work_done);
-               ier = priv->read_reg(priv, XCAN_IER_OFFSET);
-               ier |= xcan_rx_int_mask(priv);
-               priv->write_reg(priv, XCAN_IER_OFFSET, ier);
+               if (napi_complete_done(napi, work_done)) {
+                       ier = priv->read_reg(priv, XCAN_IER_OFFSET);
+                       ier |= xcan_rx_int_mask(priv);
+                       priv->write_reg(priv, XCAN_IER_OFFSET, ier);
+               }
        }
        return work_done;
 }