diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/rc/imon.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/media/rc/imon.c b/drivers/media/rc/imon.c index dec203bb06f6..178b94660b58 100644 --- a/drivers/media/rc/imon.c +++ b/drivers/media/rc/imon.c @@ -112,6 +112,7 @@ struct imon_context { bool tx_control; unsigned char usb_rx_buf[8]; unsigned char usb_tx_buf[8]; + unsigned int send_packet_delay; struct tx_t { unsigned char data_buf[35]; /* user data buffer */ @@ -185,6 +186,10 @@ enum { IMON_KEY_PANEL = 2, }; +enum { + IMON_NEED_20MS_PKT_DELAY = 1 +}; + /* * USB Device ID for iMON USB Control Boards * @@ -215,7 +220,7 @@ static struct usb_device_id imon_usb_id_table[] = { /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */ { USB_DEVICE(0x15c2, 0x0035) }, /* SoundGraph iMON OEM VFD (IR & VFD) */ - { USB_DEVICE(0x15c2, 0x0036) }, + { USB_DEVICE(0x15c2, 0x0036), .driver_info = IMON_NEED_20MS_PKT_DELAY }, /* device specifics unknown */ { USB_DEVICE(0x15c2, 0x0037) }, /* SoundGraph iMON OEM LCD (IR & LCD) */ @@ -535,12 +540,12 @@ static int send_packet(struct imon_context *ictx) kfree(control_req); /* - * Induce a mandatory 5ms delay before returning, as otherwise, + * Induce a mandatory delay before returning, as otherwise, * send_packet can get called so rapidly as to overwhelm the device, * particularly on faster systems and/or those with quirky usb. */ - timeout = msecs_to_jiffies(5); - set_current_state(TASK_UNINTERRUPTIBLE); + timeout = msecs_to_jiffies(ictx->send_packet_delay); + set_current_state(TASK_INTERRUPTIBLE); schedule_timeout(timeout); return retval; @@ -2335,6 +2340,10 @@ static int imon_probe(struct usb_interface *interface, } + /* default send_packet delay is 5ms but some devices need more */ + ictx->send_packet_delay = id->driver_info & IMON_NEED_20MS_PKT_DELAY ? + 20 : 5; + usb_set_intfdata(interface, ictx); if (ifnum == 0) { |