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stmmac: fix sleep inside atomic

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We cannot use spinlock when kmalloc is invoked with
GFP_KERNEL flag because it can sleep.
So this patch reviews the usage of spinlock within the
stmmac_resume function avoing this bug.

Signed-off-by: Giuseppe Cavallaro <[email protected]>
Reported-by: Jiri Slaby <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Giuseppe Cavallaro 2010-09-06 05:02:11 +02:00 • committed by David S. Miller
commit c4433be6e1
1 changed files with 4 additions and 5 deletions
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9
drivers/net/stmmac/stmmac_main.c
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@ -1865,15 +1865,15 @@ static int stmmac_resume(struct platform_device *pdev)
if (!netif_running(dev))
return 0;
spin_lock(&priv->lock);
if (priv->shutdown) {
/* Re-open the interface and re-init the MAC/DMA
and the rings. */
and the rings (i.e. on hibernation stage) */
stmmac_open(dev);
goto out_resume;
return 0;
}
spin_lock(&priv->lock);
/* Power Down bit, into the PM register, is cleared
* automatically as soon as a magic packet or a Wake-up frame
* is received. Anyway, it's better to manually clear
@ -1901,7 +1901,6 @@ static int stmmac_resume(struct platform_device *pdev)
netif_start_queue(dev);
out_resume:
spin_unlock(&priv->lock);
return 0;
}