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fe4d37c0c9
Sending a request by `it930x_ctrl_msg()` sometimes fails due to the error code -110 (ETIMEDOUT). However, in some situations, the response seems to be received after the ETIMEDOUT error. This can be observed by capturing packets using `tcpdump` + `usbmon`. ```shell sudo modprobe usbmon sudo tcpdump -i usbmon<n> -s0 -U -w - | tee /path/to/capture.pcap | \ tcpdump -r - ``` Actually, no ETIMEDOUT error occur during timeshift recording with the following settings at least on my environment (ROCK64 + PX-W3U4): ```text options px4_drv ctrl_timeout=5000 psb_purge_timeout=5000 ``` These two timeout values are eventually passed to `usb_bulk_msg()`.
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
// SPDX-Licence-Identifier: GPL-2.0-only
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/*
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* Module parameter definitions (px4_usb_params.c)
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*
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* Copyright (c) 2018-2021 nns779
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*/
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#include "px4_usb_params.h"
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#include <linux/kernel.h>
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#include <linux/module.h>
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struct px4_usb_param_set px4_usb_params = {
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.ctrl_timeout = 3000,
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.xfer_packets = 816,
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.urb_max_packets = 816,
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.max_urbs = 6,
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.no_dma = false
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};
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module_param_named(ctrl_timeout, px4_usb_params.ctrl_timeout,
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int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
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MODULE_PARM_DESC(ctrl_timeout,
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"Time in msecs to wait for the message to complete " \
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"before timing out (if 0 the wait is forever). (default: 3000)");
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module_param_named(xfer_packets, px4_usb_params.xfer_packets,
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uint, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
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MODULE_PARM_DESC(xfer_packets,
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"Number of transfer packets from the device. (default: 816)");
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module_param_named(urb_max_packets, px4_usb_params.urb_max_packets,
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uint, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
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MODULE_PARM_DESC(urb_max_packets,
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"Maximum number of TS packets per URB. (default: 816)");
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module_param_named(max_urbs, px4_usb_params.max_urbs,
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uint, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
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MODULE_PARM_DESC(max_urbs, "Maximum number of URBs. (default: 6)");
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module_param_named(no_dma, px4_usb_params.no_dma,
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bool, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
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