From: Chris Friesen <cfriesen@nortel.com>
Date: Tue, 28 Oct 2008 22:50:54 +0000 (-0700)
Subject: amd8111e: Fix rx return code
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=48e5ecae691cfb50aa39036ba9fc193f5c24dbb3;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

amd8111e: Fix rx return code

The amd8111e rx poll routine currently mishandles the case when we
process exactly the number of packets specified in the budget.

This patch is basically as suggested by David Miller.

Signed-off-by: Chris Friesen <cfriesen@nortel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/amd8111e.c b/drivers/net/amd8111e.c
index c54967f7942a..ba1be0b3a8c8 100644
--- a/drivers/net/amd8111e.c
+++ b/drivers/net/amd8111e.c
@@ -833,12 +833,14 @@ static int amd8111e_rx_poll(struct napi_struct *napi, int budget)
 
 	} while(intr0 & RINT0);
 
-	/* Receive descriptor is empty now */
-	spin_lock_irqsave(&lp->lock, flags);
-	__netif_rx_complete(dev, napi);
-	writel(VAL0|RINTEN0, mmio + INTEN0);
-	writel(VAL2 | RDMD0, mmio + CMD0);
-	spin_unlock_irqrestore(&lp->lock, flags);
+	if (rx_pkt_limit > 0) {
+		/* Receive descriptor is empty now */
+		spin_lock_irqsave(&lp->lock, flags);
+		__netif_rx_complete(dev, napi);
+		writel(VAL0|RINTEN0, mmio + INTEN0);
+		writel(VAL2 | RDMD0, mmio + CMD0);
+		spin_unlock_irqrestore(&lp->lock, flags);
+	}
 
 rx_not_empty:
 	return num_rx_pkt;