mirror of
https://github.com/Ysurac/openmptcprouter.git
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52 lines
2 KiB
Diff
52 lines
2 KiB
Diff
From dd109ded2b526636fff438d33433ab64ffd21583 Mon Sep 17 00:00:00 2001
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From: Georgi Valkov <gvalkov@abv.bg>
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Date: Fri, 16 Apr 2021 20:44:36 +0300
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Subject: [PATCH] ipheth: fix EOVERFLOW in ipheth_rcvbulk_callback
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When rx_buf is allocated we need to account for IPHETH_IP_ALIGN,
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which reduces the usable size by 2 bytes. Otherwise we have 1512
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bytes usable instead of 1514, and if we receive more than 1512
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bytes, ipheth_rcvbulk_callback is called with status -EOVERFLOW,
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after which the driver malfunctiones and all communication stops.
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Fixes: ipheth 2-1:4.2: ipheth_rcvbulk_callback: urb status: -75
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Signed-off-by: Georgi Valkov <gvalkov@abv.bg>
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---
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drivers/net/usb/ipheth.c | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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diff --git a/drivers/net/usb/ipheth.c b/drivers/net/usb/ipheth.c
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index 207e59e74935..06d9f19ca142 100644
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--- a/drivers/net/usb/ipheth.c
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+++ b/drivers/net/usb/ipheth.c
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@@ -121,7 +121,7 @@ static int ipheth_alloc_urbs(struct ipheth_device *iphone)
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if (tx_buf == NULL)
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goto free_rx_urb;
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- rx_buf = usb_alloc_coherent(iphone->udev, IPHETH_BUF_SIZE,
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+ rx_buf = usb_alloc_coherent(iphone->udev, IPHETH_BUF_SIZE + IPHETH_IP_ALIGN,
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GFP_KERNEL, &rx_urb->transfer_dma);
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if (rx_buf == NULL)
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goto free_tx_buf;
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@@ -146,7 +146,7 @@ static int ipheth_alloc_urbs(struct ipheth_device *iphone)
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static void ipheth_free_urbs(struct ipheth_device *iphone)
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{
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- usb_free_coherent(iphone->udev, IPHETH_BUF_SIZE, iphone->rx_buf,
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+ usb_free_coherent(iphone->udev, IPHETH_BUF_SIZE + IPHETH_IP_ALIGN, iphone->rx_buf,
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iphone->rx_urb->transfer_dma);
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usb_free_coherent(iphone->udev, IPHETH_BUF_SIZE, iphone->tx_buf,
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iphone->tx_urb->transfer_dma);
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@@ -317,7 +317,7 @@ static int ipheth_rx_submit(struct ipheth_device *dev, gfp_t mem_flags)
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usb_fill_bulk_urb(dev->rx_urb, udev,
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usb_rcvbulkpipe(udev, dev->bulk_in),
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- dev->rx_buf, IPHETH_BUF_SIZE,
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+ dev->rx_buf, IPHETH_BUF_SIZE + IPHETH_IP_ALIGN,
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ipheth_rcvbulk_callback,
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dev);
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dev->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
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--
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2.31.1
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