Interrupt handler wlcore_irq in wlcore/main.c file
invokes mutex_lock that is might sleep operation.
Found by Linux Driver Verification project (linuxtesting.org)
within my participation in the GSoC 2012 program.
drivers/net/wireless/ti/wlcore/main.c
static irqreturn_t wlcore_irq(int irq, void *cookie)
{
int ret;
unsigned long flags;
struct wl1271 *wl = cookie;
/* TX might be handled here, avoid redundant work */
set_bit(WL1271_FLAG_TX_PENDING, &wl->flags);
cancel_work_sync(&wl->tx_work);
mutex_lock(&wl->mutex);
...
}
int __devinit wlcore_probe(struct wl1271 *wl, struct platform_device *pdev)
{
...
ret = request_threaded_irq(wl->irq, wl12xx_hardirq, wlcore_irq,
irqflags,
pdev->name, wl);
...
}
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