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| author | Johan Hovold <jhovold@gmail.com> | 2014-03-12 19:09:37 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <greg@kroah.com> | 2014-03-12 20:44:49 +0100 |
| commit | d7c933ae7da0d0b112bfc7e86424d780aaeb2d2c (patch) | |
| tree | 17621c7eb8d4f2f052f2f43a6177b89eee950844 /drivers/usb/serial/cypress_m8.c | |
| parent | devicetree: bindings: document lsi,zevio-usb (diff) | |
| download | linux-d7c933ae7da0d0b112bfc7e86424d780aaeb2d2c.tar.xz linux-d7c933ae7da0d0b112bfc7e86424d780aaeb2d2c.zip | |
USB: cypress_m8: fix potential scheduling while atomic
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.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Diffstat (limited to 'drivers/usb/serial/cypress_m8.c')
| -rw-r--r-- | drivers/usb/serial/cypress_m8.c | 19 |
1 files 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); |