From 26ccbec44a7c62de4fef4f33bb858963e501921d Mon Sep 17 00:00:00 2001 From: Kevin Baradon Date: Mon, 18 Feb 2013 14:42:47 -0300 Subject: [media] media/rc/imon.c: make send_packet() delay larger for 15c2:0036 Some imon devices (like 15c2:0036) need a higher delay between send_packet calls. Default value is still 5ms to avoid regressions on already working hardware. Also use interruptible wait to avoid load average going too high (and let caller handle signals). Signed-off-by: Kevin Baradon Signed-off-by: Mauro Carvalho Chehab --- drivers/media/rc/imon.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) (limited to 'drivers/media/rc') 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) { -- cgit v1.2.3