From f6c23b174c3c96616514827407769cbcfc8005cf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Oliver=20St=C3=A4bler?= <oliver.staebler@bytesatwork.ch>
Date: Mon, 20 Nov 2017 14:45:15 +0100
Subject: [PATCH] can: ti_hecc: Fix napi poll return value for repoll
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Git-commit: f6c23b174c3c96616514827407769cbcfc8005cf
Patch-mainline: v4.15-rc3
References: bsc#1051510

After commit d75b1ade567f ("net: less interrupt masking in NAPI") napi
repoll is done only when work_done == budget.
So we need to return budget if there are still packets to receive.

Signed-off-by: Oliver Stäbler <oliver.staebler@bytesatwork.ch>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/can/ti_hecc.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/can/ti_hecc.c
+++ b/drivers/net/can/ti_hecc.c
@@ -637,6 +637,9 @@ static int ti_hecc_rx_poll(struct napi_s
 		mbx_mask = hecc_read(priv, HECC_CANMIM);
 		mbx_mask |= HECC_TX_MBOX_MASK;
 		hecc_write(priv, HECC_CANMIM, mbx_mask);
+	} else {
+		/* repoll is done only if whole budget is used */
+		num_pkts = quota;
 	}
 
 	return num_pkts;