This patch add a atomic lock in usb_tranzport_usb for preventing
a tiny race in this function.
Signed-off-by: Nicholas Krause <xerofo...@gmail.com>
---
drivers/staging/frontier/tranzport.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/staging/frontier/tranzport.c
b/drivers/staging/frontier/tranzport.c
index 2f86163..9df866f 100644
--- a/drivers/staging/frontier/tranzport.c
+++ b/drivers/staging/frontier/tranzport.c
@@ -532,8 +532,7 @@ static ssize_t usb_tranzport_read(struct file *file, char
__user *buffer,
retval = -EAGAIN;
goto unlock_exit;
}
- /* tiny race - FIXME: make atomic? */
- /* atomic_cmp_exchange(&dev->interrupt_in_done, 0 , 0); */
+ atomic_cmp_exchange(&dev->interrupt_in_done , 0 , 0);
dev->interrupt_in_done = 0;
retval = wait_event_interruptible(dev->read_wait,
dev->interrupt_in_done);
--
1.9.1
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