Since e.g. wdm_flush() calls wait_event() on WDM_IN_USE bit,
make sure to call wake_up_all() when clearing WDM_IN_USE bit.
Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/class/cdc-wdm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index e3db6fbeadef..bf2a6deb7b08 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -151,7 +151,7 @@ static void wdm_out_callback(struct urb *urb)
kfree(desc->outbuf);
desc->outbuf = NULL;
clear_bit(WDM_IN_USE, &desc->flags);
- wake_up(&desc->wait);
+ wake_up_all(&desc->wait);
}
static void wdm_in_callback(struct urb *urb)
@@ -426,6 +426,7 @@ static ssize_t wdm_write
clear_bit(WDM_IN_USE, &desc->flags);
dev_err(&desc->intf->dev, "Tx URB error: %d\n", rv);
rv = usb_translate_errors(rv);
+ wake_up_all(&desc->wait);
goto out_free_mem_pm;
} else {
dev_dbg(&desc->intf->dev, "Tx URB has been submitted index=%d\n",
--
2.18.2
