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| author | Daniele Palmas <dnlplm@gmail.com> | 2019-12-19 13:07:07 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-14 22:05:43 +0300 |
| commit | 3a56fda03237994891658d420c35b07d053d3a3d (patch) | |
| tree | 24d50f1aee3baef052e78bca146f37b7835f3885 /drivers/usb/serial/usb_wwan.c | |
| parent | e77914f232115b4967491b5fb48a0dc8330e2d4a (diff) | |
| download | linux-3a56fda03237994891658d420c35b07d053d3a3d.tar.xz | |
USB: serial: option: add ZLP support for 0x1bc7/0x9010
commit 2438c3a19dec5e98905fd3ffcc2f24716aceda6b upstream.
Telit FN980 flashing device 0x1bc7/0x9010 requires zero packet
to be sent if out data size is is equal to the endpoint max size.
Signed-off-by: Daniele Palmas <dnlplm@gmail.com>
[ johan: switch operands in conditional ]
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/serial/usb_wwan.c')
| -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 59bfcb3da116..95e9576c2fe6 100644 --- a/drivers/usb/serial/usb_wwan.c +++ b/drivers/usb/serial/usb_wwan.c @@ -492,6 +492,7 @@ static struct urb *usb_wwan_setup_urb(struct usb_serial_port *port, void (*callback) (struct urb *)) { struct usb_serial *serial = port->serial; + struct usb_wwan_intf_private *intfdata = usb_get_serial_data(serial); struct urb *urb; urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */ @@ -502,6 +503,9 @@ static struct urb *usb_wwan_setup_urb(struct usb_serial_port *port, usb_sndbulkpipe(serial->dev, endpoint) | dir, buf, len, callback, ctx); + if (intfdata->use_zlp && dir == USB_DIR_OUT) + urb->transfer_flags |= URB_ZERO_PACKET; + return urb; } |