diff options
| author | Bin Liu <b-liu@ti.com> | 2020-05-13 16:36:46 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-11 09:21:39 +0200 |
| commit | f37a82c00f0095d2ab4d8111399c23de5e8202fa (patch) | |
| tree | 5b917b75ad57b4c0f6bebfe0b5b53a89a681f90e /drivers | |
| parent | a913cddf136aa4a4795860dff73d6611321b9fc3 (diff) | |
USB: serial: usb_wwan: do not resubmit rx urb on fatal errors
commit 986c1748c84d7727defeaeca74a73b37f7d5cce1 upstream.
usb_wwan_indat_callback() shouldn't resubmit rx urb if the previous urb
status is a fatal error. Or the usb controller would keep processing the
new urbs then run into interrupt storm, and has no chance to recover.
Fixes: 6c1ee66a0b2b ("USB-Serial: Fix error handling of usb_wwan")
Cc: stable@vger.kernel.org
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/serial/usb_wwan.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c index 485bad73b6ed..814a72935a21 100644 --- a/drivers/usb/serial/usb_wwan.c +++ b/drivers/usb/serial/usb_wwan.c @@ -305,6 +305,10 @@ static void usb_wwan_indat_callback(struct urb *urb) if (status) { dev_dbg(dev, "%s: nonzero status: %d on endpoint %02x.\n", __func__, status, endpoint); + + /* don't resubmit on fatal errors */ + if (status == -ESHUTDOWN || status == -ENOENT) + return; } else { if (urb->actual_length) { tty_insert_flip_string(&port->port, data, |