From: Soren Brinkmann <soren.brinkmann@xilinx.com>
To: Michal Simek <michal.simek@xilinx.com>,
Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: "Sören Brinkmann" <soren.brinkmann@xilinx.com>,
git@xilinx.com, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org
Subject: [PATCH 3/5] net: macb: Re-enable RX interrupt only when RX is done
Date: Sun, 4 May 2014 15:43:00 -0700 [thread overview]
Message-ID: <1399243382-12528-4-git-send-email-soren.brinkmann@xilinx.com> (raw)
In-Reply-To: <1399243382-12528-1-git-send-email-soren.brinkmann@xilinx.com>
When data is received during the driver processing received data the
NAPI is re-scheduled. In that case the RX interrupt should not be
re-enabled.
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
---
drivers/net/ethernet/cadence/macb.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index e38fe39d9589..3f4b8ee0b0e7 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -891,16 +891,15 @@ static int macb_poll(struct napi_struct *napi, int budget)
if (work_done < budget) {
napi_complete(napi);
- /*
- * We've done what we can to clean the buffers. Make sure we
- * get notified when new packets arrive.
- */
- macb_writel(bp, IER, MACB_RX_INT_FLAGS);
-
/* Packets received while interrupts were disabled */
status = macb_readl(bp, RSR);
- if (unlikely(status))
+ if (unlikely(status)) {
+ if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
+ macb_writel(bp, ISR, MACB_BIT(RCOMP));
napi_reschedule(napi);
+ } else {
+ macb_writel(bp, IER, MACB_RX_INT_FLAGS);
+ }
}
/* TODO: Handle errors */
--
1.9.2.1.g06c4abd
next prev parent reply other threads:[~2014-05-04 22:44 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-04 22:42 [PATCH 0/5] net: macb: Fixes Soren Brinkmann
2014-05-04 22:42 ` [PATCH 1/5] net: macb: Pass same size to DMA_UNMAP as used for DMA_MAP Soren Brinkmann
2014-05-04 22:42 ` [PATCH 2/5] net: macb: Clear interrupt flags Soren Brinkmann
2014-05-04 22:43 ` Soren Brinkmann [this message]
2014-05-04 22:43 ` [PATCH 4/5] net: macb: Remove 'unlikely' optimization Soren Brinkmann
2014-05-04 22:43 ` [PATCH 5/5] net: macb: Fix race between HW and driver Soren Brinkmann
2014-05-05 20:56 ` David Miller
2014-05-05 21:05 ` Sören Brinkmann
2014-05-05 21:09 ` David Miller
2014-05-05 21:10 ` Sören Brinkmann
2014-05-05 21:12 ` David Miller
2014-05-22 13:18 ` [PATCH 0/5] net: macb: Fixes Alexandre Belloni
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