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cpmac: fix race condition (closes #3019)

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10747 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
matteo 2008-04-06 19:33:14 +00:00
parent 724e74c175
commit 72262b7d39
1 changed files with 15 additions and 13 deletions
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28
target/linux/ar7/patches-2.6.24/140-cpmac_fix.patch
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@ -1,5 +1,5 @@
--- linux-2.6.24/drivers/net/cpmac.c 2008-01-25 02:20:37.000000000 +0100 --- /usr/src/linux-2.6.24/drivers/net/cpmac.c 2008-01-25 02:20:37.000000000 +0100
+++ linux-2.6.24/drivers/net/cpmac.c 2008-02-08 20:04:58.000000000 +0100 +++ cpmac.c 2008-04-06 21:30:03.000000000 +0200
@@ -38,6 +38,7 @@ @@ -38,6 +38,7 @@
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/dma-mapping.h> #include <linux/dma-mapping.h>
@ -43,10 +43,12 @@
struct cpmac_priv *priv = struct cpmac_priv *priv =
container_of(work, struct cpmac_priv, reset_work); container_of(work, struct cpmac_priv, reset_work);
@@ -650,8 +655,46 @@ @@ -650,8 +655,47 @@
spin_unlock(&priv->rx_lock); spin_unlock(&priv->rx_lock);
cpmac_clear_tx(priv->dev); cpmac_clear_tx(priv->dev);
cpmac_hw_start(priv->dev); cpmac_hw_start(priv->dev);
- napi_enable(&priv->napi);
- netif_start_queue(priv->dev);
+ barrier(); + barrier();
+ atomic_dec(&priv->reset_pending); + atomic_dec(&priv->reset_pending);
+ +
@ -54,6 +56,7 @@
+ netif_wake_subqueue(priv->dev, i); + netif_wake_subqueue(priv->dev, i);
+ } + }
+ netif_wake_queue(priv->dev); + netif_wake_queue(priv->dev);
+ cpmac_write(priv->regs, CPMAC_MAC_INT_ENABLE, 3);
+} +}
+ +
+static void cpmac_check_status(struct net_device *dev) +static void cpmac_check_status(struct net_device *dev)
@ -82,16 +85,15 @@
+ netif_stop_queue(dev); + netif_stop_queue(dev);
+ cpmac_hw_stop(dev); + cpmac_hw_stop(dev);
+ if (schedule_work(&priv->reset_work)) + if (schedule_work(&priv->reset_work))
+ atomic_inc(&priv->reset_pending); + atomic_inc(&priv->reset_pending);
+ if (unlikely(netif_msg_hw(priv))) + if (unlikely(netif_msg_hw(priv)))
+ cpmac_dump_regs(dev); + cpmac_dump_regs(dev);
+ } + }
napi_enable(&priv->napi); + cpmac_write(priv->regs, CPMAC_MAC_INT_CLEAR, 0xff);
- netif_start_queue(priv->dev);
} }
static irqreturn_t cpmac_irq(int irq, void *dev_id) static irqreturn_t cpmac_irq(int irq, void *dev_id)
@@ -661,9 +704,6 @@ @@ -661,9 +705,6 @@
int queue; int queue;
u32 status; u32 status;
@ -101,7 +103,7 @@
priv = netdev_priv(dev); priv = netdev_priv(dev);
status = cpmac_read(priv->regs, CPMAC_MAC_INT_VECTOR); status = cpmac_read(priv->regs, CPMAC_MAC_INT_VECTOR);
@@ -685,49 +725,33 @@ @@ -685,49 +726,33 @@
cpmac_write(priv->regs, CPMAC_MAC_EOI_VECTOR, 0); cpmac_write(priv->regs, CPMAC_MAC_EOI_VECTOR, 0);
@ -165,7 +167,7 @@
} }
static int cpmac_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) static int cpmac_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
@@ -848,15 +872,6 @@ @@ -848,15 +873,6 @@
spin_unlock(&priv->lock); spin_unlock(&priv->lock);
} }
@ -181,7 +183,7 @@
static int cpmac_open(struct net_device *dev) static int cpmac_open(struct net_device *dev)
{ {
int i, size, res; int i, size, res;
@@ -923,6 +938,7 @@ @@ -923,6 +939,7 @@
goto fail_irq; goto fail_irq;
} }
@ -189,7 +191,7 @@
INIT_WORK(&priv->reset_work, cpmac_hw_error); INIT_WORK(&priv->reset_work, cpmac_hw_error);
cpmac_hw_start(dev); cpmac_hw_start(dev);
@@ -999,11 +1015,11 @@ @@ -999,11 +1016,11 @@
static int __devinit cpmac_probe(struct platform_device *pdev) static int __devinit cpmac_probe(struct platform_device *pdev)
{ {
int rc, phy_id, i; int rc, phy_id, i;
@ -202,7 +204,7 @@
DECLARE_MAC_BUF(mac); DECLARE_MAC_BUF(mac);
pdata = pdev->dev.platform_data; pdata = pdev->dev.platform_data;
@@ -1017,9 +1033,23 @@ @@ -1017,9 +1034,23 @@
} }
if (phy_id == PHY_MAX_ADDR) { if (phy_id == PHY_MAX_ADDR) {
@ -228,7 +230,7 @@
printk(KERN_ERR "cpmac: no PHY present\n"); printk(KERN_ERR "cpmac: no PHY present\n");
return -ENODEV; return -ENODEV;
} }
@@ -1063,32 +1093,8 @@ @@ -1063,32 +1094,8 @@
priv->msg_enable = netif_msg_init(debug_level, 0xff); priv->msg_enable = netif_msg_init(debug_level, 0xff);
memcpy(dev->dev_addr, pdata->dev_addr, sizeof(dev->dev_addr)); memcpy(dev->dev_addr, pdata->dev_addr, sizeof(dev->dev_addr));