62 lines
2.1 KiB
Diff
62 lines
2.1 KiB
Diff
From 3361dc9538832a2a9150a8c722374ca844bf8dc8 Mon Sep 17 00:00:00 2001
|
|
From: Mikulas Patocka <mpatocka@redhat.com>
|
|
Date: Fri, 20 Sep 2013 17:53:22 +0000
|
|
Subject: skge: fix invalid value passed to pci_unmap_sigle
|
|
|
|
In my patch c194992cbe71c20bb3623a566af8d11b0bfaa721 ("skge: fix
|
|
broken driver") I didn't fix the skge bug correctly. The value of the
|
|
new mapping (not old) was passed to pci_unmap_single.
|
|
|
|
If we enable CONFIG_DMA_API_DEBUG, it results in this warning:
|
|
WARNING: CPU: 0 PID: 0 at lib/dma-debug.c:986 check_sync+0x4c4/0x580()
|
|
skge 0000:02:07.0: DMA-API: device driver tries to sync DMA memory it has
|
|
not allocated [device address=0x000000023a0096c0] [size=1536 bytes]
|
|
|
|
This patch makes the skge driver pass the correct value to
|
|
pci_unmap_single and fixes the warning. It copies the old descriptor to
|
|
on-stack variable "ee" and unmaps it if mapping of the new descriptor
|
|
succeeded.
|
|
|
|
This patch should be backported to 3.11-stable.
|
|
|
|
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
|
|
Reported-by: Francois Romieu <romieu@fr.zoreil.com>
|
|
Tested-by: Mikulas Patocka <mpatocka@redhat.com>
|
|
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
---
|
|
diff --git a/drivers/net/ethernet/marvell/skge.c b/drivers/net/ethernet/marvell/skge.c
|
|
index 1a9c4f6..ecc7f7b 100644
|
|
--- a/drivers/net/ethernet/marvell/skge.c
|
|
+++ b/drivers/net/ethernet/marvell/skge.c
|
|
@@ -3086,13 +3086,16 @@ static struct sk_buff *skge_rx_get(struct net_device *dev,
|
|
PCI_DMA_FROMDEVICE);
|
|
skge_rx_reuse(e, skge->rx_buf_size);
|
|
} else {
|
|
+ struct skge_element ee;
|
|
struct sk_buff *nskb;
|
|
|
|
nskb = netdev_alloc_skb_ip_align(dev, skge->rx_buf_size);
|
|
if (!nskb)
|
|
goto resubmit;
|
|
|
|
- skb = e->skb;
|
|
+ ee = *e;
|
|
+
|
|
+ skb = ee.skb;
|
|
prefetch(skb->data);
|
|
|
|
if (skge_rx_setup(skge, e, nskb, skge->rx_buf_size) < 0) {
|
|
@@ -3101,8 +3104,8 @@ static struct sk_buff *skge_rx_get(struct net_device *dev,
|
|
}
|
|
|
|
pci_unmap_single(skge->hw->pdev,
|
|
- dma_unmap_addr(e, mapaddr),
|
|
- dma_unmap_len(e, maplen),
|
|
+ dma_unmap_addr(&ee, mapaddr),
|
|
+ dma_unmap_len(&ee, maplen),
|
|
PCI_DMA_FROMDEVICE);
|
|
}
|
|
|
|
--
|
|
cgit v0.9.2
|