Complete() will be run with interrupt enabled, so change to
spin_lock_irqsave().
Cc: Juergen Stuber <starb...@users.sourceforge.net>
Signed-off-by: Ming Lei <ming....@canonical.com>
---
drivers/usb/misc/legousbtower.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/misc/legousbtower.c b/drivers/usb/misc/legousbtower.c
index eb37c95..d1bc420 100644
--- a/drivers/usb/misc/legousbtower.c
+++ b/drivers/usb/misc/legousbtower.c
@@ -739,7 +739,9 @@ static void tower_interrupt_in_callback (struct urb *urb)
}
if (urb->actual_length > 0) {
- spin_lock (&dev->read_buffer_lock);
+ unsigned long flags;
+
+ 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,
@@ -752,7 +754,7 @@ static void tower_interrupt_in_callback (struct urb *urb)
pr_warn("read_buffer overflow, %d bytes dropped\n",
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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