From: Stanislaw Gruszka Date: Fri, 6 Jan 2017 13:05:10 +0000 (+0100) Subject: rt2800usb: remove watchdog X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=480b468625da1f054c487f7168e9a9bdc1bf869b;p=openwrt%2Fstaging%2Fblogic.git rt2800usb: remove watchdog On rt2800usb, if we do not get TX status from HW, we assume frames were posted and after entry->last_action timeout, we forcibly provide TX status to mac80211. So it's not possible to detect hardware TX hung based on the timeout. Additionally TXRQ_PCNT tells on number of frames in the Packet Buffer (buffer between bus interface and chip MAC subsystem), which can be non zero on normal conditions. To check HW hung we will need provide some different mechanism, for now remove watchdog as current implementation is wrong and not useful. Signed-off-by: Stanislaw Gruszka Signed-off-by: Kalle Valo --- diff --git a/drivers/net/wireless/ralink/rt2x00/rt2800usb.c b/drivers/net/wireless/ralink/rt2x00/rt2800usb.c index f38c44061b5b..8ec22c00510f 100644 --- a/drivers/net/wireless/ralink/rt2x00/rt2800usb.c +++ b/drivers/net/wireless/ralink/rt2x00/rt2800usb.c @@ -435,47 +435,6 @@ static int rt2800usb_set_device_state(struct rt2x00_dev *rt2x00dev, return retval; } -/* - * Watchdog handlers - */ -static void rt2800usb_watchdog(struct rt2x00_dev *rt2x00dev) -{ - unsigned int i; - u32 reg; - - rt2x00usb_register_read(rt2x00dev, TXRXQ_PCNT, ®); - if (rt2x00_get_field32(reg, TXRXQ_PCNT_TX0Q)) { - rt2x00_warn(rt2x00dev, "TX HW queue 0 timed out, invoke forced kick\n"); - - rt2x00usb_register_write(rt2x00dev, PBF_CFG, 0xf40012); - - for (i = 0; i < 10; i++) { - udelay(10); - if (!rt2x00_get_field32(reg, TXRXQ_PCNT_TX0Q)) - break; - } - - rt2x00usb_register_write(rt2x00dev, PBF_CFG, 0xf40006); - } - - rt2x00usb_register_read(rt2x00dev, TXRXQ_PCNT, ®); - if (rt2x00_get_field32(reg, TXRXQ_PCNT_TX1Q)) { - rt2x00_warn(rt2x00dev, "TX HW queue 1 timed out, invoke forced kick\n"); - - rt2x00usb_register_write(rt2x00dev, PBF_CFG, 0xf4000a); - - for (i = 0; i < 10; i++) { - udelay(10); - if (!rt2x00_get_field32(reg, TXRXQ_PCNT_TX1Q)) - break; - } - - rt2x00usb_register_write(rt2x00dev, PBF_CFG, 0xf40006); - } - - rt2x00usb_watchdog(rt2x00dev); -} - /* * TX descriptor initialization */ @@ -877,7 +836,6 @@ static const struct rt2x00lib_ops rt2800usb_rt2x00_ops = { .link_tuner = rt2800_link_tuner, .gain_calibration = rt2800_gain_calibration, .vco_calibration = rt2800_vco_calibration, - .watchdog = rt2800usb_watchdog, .start_queue = rt2800usb_start_queue, .kick_queue = rt2x00usb_kick_queue, .stop_queue = rt2800usb_stop_queue,