diff options
Diffstat (limited to 'target/linux/ar7/patches-2.6.25/140-cpmac_fix.patch')
| -rw-r--r-- | target/linux/ar7/patches-2.6.25/140-cpmac_fix.patch | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/target/linux/ar7/patches-2.6.25/140-cpmac_fix.patch b/target/linux/ar7/patches-2.6.25/140-cpmac_fix.patch deleted file mode 100644 index f6f29eb82..000000000 --- a/target/linux/ar7/patches-2.6.25/140-cpmac_fix.patch +++ /dev/null @@ -1,167 +0,0 @@ ---- a/drivers/net/cpmac.c -+++ b/drivers/net/cpmac.c -@@ -38,6 +38,7 @@ - #include <linux/platform_device.h> - #include <linux/dma-mapping.h> - #include <asm/gpio.h> -+#include <asm/atomic.h> - - MODULE_AUTHOR("Eugene Konev <ejka@imfi.kspu.ru>"); - MODULE_DESCRIPTION("TI AR7 ethernet driver (CPMAC)"); -@@ -207,6 +208,7 @@ - struct work_struct reset_work; - struct platform_device *pdev; - struct napi_struct napi; -+ atomic_t reset_pending; - }; - - static irqreturn_t cpmac_irq(int, void *); -@@ -455,6 +457,9 @@ - struct cpmac_desc *desc; - struct cpmac_priv *priv = netdev_priv(dev); - -+ if (unlikely(atomic_read(&priv->reset_pending))) -+ return NETDEV_TX_BUSY; -+ - if (unlikely(skb_padto(skb, ETH_ZLEN))) - return NETDEV_TX_OK; - -@@ -634,14 +639,14 @@ - priv->desc_ring[i].dataflags = 0; - if (priv->desc_ring[i].skb) { - dev_kfree_skb_any(priv->desc_ring[i].skb); -- if (netif_subqueue_stopped(dev, i)) -- netif_wake_subqueue(dev, i); -+ priv->desc_ring[i].skb = NULL; - } - } - } - - static void cpmac_hw_error(struct work_struct *work) - { -+ int i; - struct cpmac_priv *priv = - container_of(work, struct cpmac_priv, reset_work); - -@@ -650,8 +655,47 @@ - spin_unlock(&priv->rx_lock); - cpmac_clear_tx(priv->dev); - cpmac_hw_start(priv->dev); -- napi_enable(&priv->napi); -- netif_start_queue(priv->dev); -+ barrier(); -+ atomic_dec(&priv->reset_pending); -+ -+ for (i = 0; i < CPMAC_QUEUES; i++) { -+ netif_wake_subqueue(priv->dev, i); -+ } -+ netif_wake_queue(priv->dev); -+ cpmac_write(priv->regs, CPMAC_MAC_INT_ENABLE, 3); -+} -+ -+static void cpmac_check_status(struct net_device *dev) -+{ -+ struct cpmac_priv *priv = netdev_priv(dev); -+ -+ u32 macstatus = cpmac_read(priv->regs, CPMAC_MAC_STATUS); -+ int rx_channel = (macstatus >> 8) & 7; -+ int rx_code = (macstatus >> 12) & 15; -+ int tx_channel = (macstatus >> 16) & 7; -+ int tx_code = (macstatus >> 20) & 15; -+ -+ if (rx_code || tx_code) { -+ if (netif_msg_drv(priv) && net_ratelimit()) { -+ /* Can't find any documentation on what these error codes actually are. -+ * So just log them and hope.. -+ */ -+ if (rx_code) -+ printk(KERN_WARNING "%s: host error %d on rx channel %d (macstatus %08x), resetting\n", -+ dev->name, rx_code, rx_channel, macstatus); -+ if (tx_code) -+ printk(KERN_WARNING "%s: host error %d on tx channel %d (macstatus %08x), resetting\n", -+ dev->name, tx_code, tx_channel, macstatus); -+ } -+ -+ netif_stop_queue(dev); -+ cpmac_hw_stop(dev); -+ if (schedule_work(&priv->reset_work)) -+ atomic_inc(&priv->reset_pending); -+ if (unlikely(netif_msg_hw(priv))) -+ cpmac_dump_regs(dev); -+ } -+ cpmac_write(priv->regs, CPMAC_MAC_INT_CLEAR, 0xff); - } - - static irqreturn_t cpmac_irq(int irq, void *dev_id) -@@ -682,49 +726,33 @@ - - cpmac_write(priv->regs, CPMAC_MAC_EOI_VECTOR, 0); - -- if (unlikely(status & (MAC_INT_HOST | MAC_INT_STATUS))) { -- if (netif_msg_drv(priv) && net_ratelimit()) -- printk(KERN_ERR "%s: hw error, resetting...\n", -- dev->name); -- netif_stop_queue(dev); -- napi_disable(&priv->napi); -- cpmac_hw_stop(dev); -- schedule_work(&priv->reset_work); -- if (unlikely(netif_msg_hw(priv))) -- cpmac_dump_regs(dev); -- } -+ if (unlikely(status & (MAC_INT_HOST | MAC_INT_STATUS))) -+ cpmac_check_status(dev); - - return IRQ_HANDLED; - } - - static void cpmac_tx_timeout(struct net_device *dev) - { -- struct cpmac_priv *priv = netdev_priv(dev); - int i; -+ struct cpmac_priv *priv = netdev_priv(dev); - - spin_lock(&priv->lock); - dev->stats.tx_errors++; - spin_unlock(&priv->lock); - if (netif_msg_tx_err(priv) && net_ratelimit()) - printk(KERN_WARNING "%s: transmit timeout\n", dev->name); -- /* -- * FIXME: waking up random queue is not the best thing to -- * do... on the other hand why we got here at all? -- */ --#ifdef CONFIG_NETDEVICES_MULTIQUEUE -- for (i = 0; i < CPMAC_QUEUES; i++) -- if (priv->desc_ring[i].skb) { -- priv->desc_ring[i].dataflags = 0; -- dev_kfree_skb_any(priv->desc_ring[i].skb); -- netif_wake_subqueue(dev, i); -- break; -- } --#else -- priv->desc_ring[0].dataflags = 0; -- if (priv->desc_ring[0].skb) -- dev_kfree_skb_any(priv->desc_ring[0].skb); -- netif_wake_queue(dev); --#endif -+ -+ atomic_inc(&priv->reset_pending); -+ barrier(); -+ cpmac_clear_tx(dev); -+ barrier(); -+ atomic_dec(&priv->reset_pending); -+ -+ netif_wake_queue(priv->dev); -+ for (i = 0; i < CPMAC_QUEUES; i++) { -+ netif_wake_subqueue(dev, i); -+ } - } - - static int cpmac_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) -@@ -911,6 +939,7 @@ - goto fail_irq; - } - -+ atomic_set(&priv->reset_pending, 0); - INIT_WORK(&priv->reset_work, cpmac_hw_error); - cpmac_hw_start(dev); - |