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SubjectBUG: double spinlock in "drivers/net/3c505.c"
Date
	KERNEL_VERSION: 2.6.35-rc1
SUBJECT: duble spinlock in function elp_start_xmit
SUBSCRIBE:
In driver drivers/net/3c505.c in function elp_start_xmit:

1. In line 1075 we have first spinlock. In the next line we called
check_3c505_dma:

1070 static netdev_tx_t elp_start_xmit(struct sk_buff *skb, struct net_device
*dev)
1071 {
1072 unsigned long flags;
1073 elp_device *adapter = netdev_priv(dev);
1074
1075 spin_lock_irqsave(&adapter->lock, flags);
1076 check_3c505_dma(dev);

2. In function check_3c505_dma we have second spinloock at line 301.

293 static inline void check_3c505_dma(struct net_device *dev)
294 {
295 elp_device *adapter = netdev_priv(dev);
296 if (adapter->dmaing && time_after(jiffies, adapter-
>current_dma.start_time + 10)) {
297 unsigned long flags, f;
298 pr_err("%s: DMA %s timed out, %d bytes left\n", dev-
>name,
299 adapter->current_dma.direction ? "download" :
"upload",
300 get_dma_residue(dev->dma));
301 spin_lock_irqsave(&adapter->lock, flags);


Found by Linux Device Drivers Verification Project (Svace Detector)


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