Complete() will be run with interrupt enabled, so change to
spin_lock_irqsave().
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxxxxx>
---
drivers/usb/misc/uss720.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/misc/uss720.c b/drivers/usb/misc/uss720.c
index e129cf6..f7d15e8 100644
--- a/drivers/usb/misc/uss720.c
+++ b/drivers/usb/misc/uss720.c
@@ -121,6 +121,7 @@ static void async_complete(struct urb *urb)
dev_err(&urb->dev->dev, "async_complete: urb error %d\n",
status);
} else if (rq->dr.bRequest == 3) {
+ unsigned long flags;
memcpy(priv->reg, rq->reg, sizeof(priv->reg));
#if 0
dev_dbg(&priv->usbdev->dev,
@@ -131,8 +132,11 @@ static void async_complete(struct urb *urb)
(unsigned int)priv->reg[6]);
#endif
/* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */
- if (rq->reg[2] & rq->reg[1] & 0x10 && pp)
+ if (rq->reg[2] & rq->reg[1] & 0x10 && pp) {
+ local_irq_save(flags);
parport_generic_irq(pp);
+ local_irq_restore(flags);
+ }
}
complete(&rq->compl);
kref_put(&rq->ref_count, destroy_async);
--
1.7.9.5
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