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6c409cad3d
Deadlock issue is observed during our stress tests. The root cause for the issue is same lock is used between tx and rx threads. This patch adds a separate mutex lock for rx thread to resolve the problem. Signed-off-by: Karun Eagalapati <karun256@gmail.com> Signed-off-by: Amitkumar Karwar <amit.karwar@redpinesignals.com> Signed-off-by: Prameela Rani Garnepudi <prameela.j04cs@gmail.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
/**
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* Copyright (c) 2014 Redpine Signals Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#include <linux/firmware.h>
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#include "rsi_usb.h"
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/**
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* rsi_usb_rx_thread() - This is a kernel thread to receive the packets from
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* the USB device.
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* @common: Pointer to the driver private structure.
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*
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* Return: None.
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*/
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void rsi_usb_rx_thread(struct rsi_common *common)
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{
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struct rsi_hw *adapter = common->priv;
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struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
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int status;
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do {
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rsi_wait_event(&dev->rx_thread.event, EVENT_WAIT_FOREVER);
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if (atomic_read(&dev->rx_thread.thread_done))
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goto out;
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mutex_lock(&common->rx_lock);
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status = rsi_read_pkt(common, 0);
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if (status) {
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rsi_dbg(ERR_ZONE, "%s: Failed To read data", __func__);
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mutex_unlock(&common->rx_lock);
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return;
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}
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mutex_unlock(&common->rx_lock);
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rsi_reset_event(&dev->rx_thread.event);
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if (adapter->rx_urb_submit(adapter)) {
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rsi_dbg(ERR_ZONE,
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"%s: Failed in urb submission", __func__);
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return;
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}
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} while (1);
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out:
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rsi_dbg(INFO_ZONE, "%s: Terminated thread\n", __func__);
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complete_and_exit(&dev->rx_thread.completion, 0);
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}
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