Hello Alexey On 5/17/2014 1:15 AM, Alexey Khoroshilov wrote:
There are calls to might sleep functions in atomic context in stmmac_resume(): - the first one is clk_prepare_enable(priv->stmmac_clk); - the second one is stmmac_hw_setup() -> init_dma_desc_rings() -> stmmac_init_rx_buffers() -> __netdev_alloc_skb(GFP_KERNEL)What is the purpose of spin_lock_irqsave(&priv->lock, flags) section? What does it protect against?
Some part of this driver, especially on PM stuff, has been reworked time ago. I have in plan to do further tests and investigations also to understand and try to solve this kind of issues. I do not want to see this kind of BUGs. Also I have some other patches on other pending problem I will submit to be reviewed. I hope to start doing this task in the incoming days. BR peppe
Found by Linux Driver Verification project (linuxtesting.org). -- Alexey Khoroshilov Linux Verification Center, ISPRAS web: http://linuxtesting.org
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