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34 lines
1.2 KiB
Diff
34 lines
1.2 KiB
Diff
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From c4b6e9341f930e4dd089231c0414758f5f1f9dbd Mon Sep 17 00:00:00 2001
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From: Aleksander Jan Bajkowski <olek2@wp.pl>
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Date: Wed, 24 Aug 2022 23:54:07 +0200
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Subject: [PATCH] net: lantiq_xrx200: fix lock under memory pressure
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When the xrx200_hw_receive() function returns -ENOMEM, the NAPI poll
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function immediately returns an error.
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This is incorrect for two reasons:
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* the function terminates without enabling interrupts or scheduling NAPI,
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* the error code (-ENOMEM) is returned instead of the number of received
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packets.
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After the first memory allocation failure occurs, packet reception is
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locked due to disabled interrupts from DMA..
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Fixes: fe1a56420cf2 ("net: lantiq: Add Lantiq / Intel VRX200 Ethernet driver")
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Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
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Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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---
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drivers/net/ethernet/lantiq_xrx200.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/net/ethernet/lantiq_xrx200.c
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+++ b/drivers/net/ethernet/lantiq_xrx200.c
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@@ -294,7 +294,7 @@ static int xrx200_poll_rx(struct napi_st
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if (ret == XRX200_DMA_PACKET_IN_PROGRESS)
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continue;
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if (ret != XRX200_DMA_PACKET_COMPLETE)
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- return ret;
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+ break;
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rx++;
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} else {
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break;
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