Complete() will be run with interrupt enabled, so change to
spin_lock_irqsave().
Cc: Juergen Stuber <starblue@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxxxxx>
---
drivers/usb/misc/legousbtower.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/misc/legousbtower.c b/drivers/usb/misc/legousbtower.c
index 8089479..4044989 100644
--- a/drivers/usb/misc/legousbtower.c
+++ b/drivers/usb/misc/legousbtower.c
@@ -771,6 +771,7 @@ static void tower_interrupt_in_callback (struct urb *urb)
struct lego_usb_tower *dev = urb->context;
int status = urb->status;
int retval;
+ unsigned long flags;
dbg(4, "%s: enter, status %d", __func__, status);
@@ -788,7 +789,7 @@ static void tower_interrupt_in_callback (struct urb *urb)
}
if (urb->actual_length > 0) {
- spin_lock (&dev->read_buffer_lock);
+ spin_lock_irqsave (&dev->read_buffer_lock, flags);
if (dev->read_buffer_length + urb->actual_length < read_buffer_size) {
memcpy (dev->read_buffer + dev->read_buffer_length,
dev->interrupt_in_buffer,
@@ -799,7 +800,7 @@ static void tower_interrupt_in_callback (struct urb *urb)
} else {
printk(KERN_WARNING "%s: read_buffer overflow, %d bytes dropped", __func__, urb->actual_length);
}
- spin_unlock (&dev->read_buffer_lock);
+ spin_unlock_irqrestore (&dev->read_buffer_lock, flags);
}
resubmit:
--
1.7.9.5
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