Remove erroneous call to usb_clear_halt which is blocking and cannot be
used in interrupt context.
This code has possibly never been executed as it would cause an oops if
it was. Simply treat a stalled-endpoint error as any other error
condition.
Cc: stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx>
---
drivers/usb/serial/cypress_m8.c | 19 +++----------------
1 file changed, 3 insertions(+), 16 deletions(-)
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index bccb1223143a..634f0d6605ed 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -1224,7 +1224,6 @@ static void cypress_write_int_callback(struct urb *urb)
struct usb_serial_port *port = urb->context;
struct cypress_private *priv = usb_get_serial_port_data(port);
struct device *dev = &urb->dev->dev;
- int result;
int status = urb->status;
switch (status) {
@@ -1239,21 +1238,9 @@ static void cypress_write_int_callback(struct urb *urb)
__func__, status);
priv->write_urb_in_use = 0;
return;
- case -EPIPE: /* no break needed; clear halt and resubmit */
- if (!priv->comm_is_ok)
- break;
- usb_clear_halt(port->serial->dev, 0x02);
- /* error in the urb, so we have to resubmit it */
- dev_dbg(dev, "%s - nonzero write bulk status received: %d\n",
- __func__, status);
- port->interrupt_out_urb->transfer_buffer_length = 1;
- result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC);
- if (!result)
- return;
- dev_err(dev, "%s - failed resubmitting write urb, error %d\n",
- __func__, result);
- cypress_set_dead(port);
- break;
+ case -EPIPE:
+ /* Cannot call usb_clear_halt while in_interrupt */
+ /* FALLTHROUGH */
default:
dev_err(dev, "%s - unexpected nonzero write status received: %d\n",
__func__, status);
--
1.8.3.2
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