ec759c0015
[ Upstream commit 4c62764d0fc21a34ffc44eec1210038c3a2e4473 ] While running regressions, observed below kernel panic when sdio disconnect called. This is because of, kthread_stop() is taking care of wait_for_completion() by default. When wait_for_completion triggered in kthread_stop and as it was done already, giving kernel panic. Hence, removing redundant wait_for_completion() from rsi_kill_thread(). ... skipping ... BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffff810a63df>] exit_creds+0x1f/0x50 PGD 0 Oops: 0002 [#1] SMP CPU: 0 PID: 6502 Comm: rmmod Tainted: G OE 4.15.9-Generic #154-Ubuntu Hardware name: Dell Inc. Edge Gateway 3003/ , BIOS 01.00.00 04/17/2017 Stack: ffff88007392e600 ffff880075847dc0 ffffffff8108160a 0000000000000000 ffff88007392e600 ffff880075847de8 ffffffff810a484b ffff880076127000 ffff88003cd3a800 ffff880074f12a00 ffff880075847e28 ffffffffc09bed15 Call Trace: [<ffffffff8108160a>] __put_task_struct+0x5a/0x140 [<ffffffff810a484b>] kthread_stop+0x10b/0x110 [<ffffffffc09bed15>] rsi_disconnect+0x2f5/0x300 [ven_rsi_sdio] [<ffffffff81578bcb>] ? __pm_runtime_resume+0x5b/0x80 [<ffffffff816f0918>] sdio_bus_remove+0x38/0x100 [<ffffffff8156cc64>] __device_release_driver+0xa4/0x150 [<ffffffff8156d7a5>] driver_detach+0xb5/0xc0 [<ffffffff8156c6c5>] bus_remove_driver+0x55/0xd0 [<ffffffff8156dfbc>] driver_unregister+0x2c/0x50 [<ffffffff816f0b8a>] sdio_unregister_driver+0x1a/0x20 [<ffffffffc09bf0f5>] rsi_module_exit+0x15/0x30 [ven_rsi_sdio] [<ffffffff8110cad8>] SyS_delete_module+0x1b8/0x210 [<ffffffff81851dc8>] entry_SYSCALL_64_fastpath+0x1c/0xbb Signed-off-by: Siva Rebbagondla <siva.rebbagondla@redpinesignals.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
86 lines
2.5 KiB
C
86 lines
2.5 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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#ifndef __RSI_COMMON_H__
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#define __RSI_COMMON_H__
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#include <linux/kthread.h>
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#define EVENT_WAIT_FOREVER 0
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#define TA_LOAD_ADDRESS 0x00
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#define FIRMWARE_RSI9113 "rsi_91x.fw"
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#define QUEUE_NOT_FULL 1
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#define QUEUE_FULL 0
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static inline int rsi_init_event(struct rsi_event *pevent)
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{
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atomic_set(&pevent->event_condition, 1);
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init_waitqueue_head(&pevent->event_queue);
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return 0;
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}
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static inline int rsi_wait_event(struct rsi_event *event, u32 timeout)
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{
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int status = 0;
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if (!timeout)
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status = wait_event_interruptible(event->event_queue,
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(atomic_read(&event->event_condition) == 0));
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else
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status = wait_event_interruptible_timeout(event->event_queue,
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(atomic_read(&event->event_condition) == 0),
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timeout);
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return status;
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}
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static inline void rsi_set_event(struct rsi_event *event)
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{
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atomic_set(&event->event_condition, 0);
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wake_up_interruptible(&event->event_queue);
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}
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static inline void rsi_reset_event(struct rsi_event *event)
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{
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atomic_set(&event->event_condition, 1);
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}
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static inline int rsi_create_kthread(struct rsi_common *common,
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struct rsi_thread *thread,
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void *func_ptr,
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u8 *name)
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{
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init_completion(&thread->completion);
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thread->task = kthread_run(func_ptr, common, "%s", name);
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if (IS_ERR(thread->task))
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return (int)PTR_ERR(thread->task);
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return 0;
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}
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static inline int rsi_kill_thread(struct rsi_thread *handle)
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{
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atomic_inc(&handle->thread_done);
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rsi_set_event(&handle->event);
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return kthread_stop(handle->task);
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}
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void rsi_mac80211_detach(struct rsi_hw *hw);
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u16 rsi_get_connected_channel(struct rsi_hw *adapter);
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struct rsi_hw *rsi_91x_init(void);
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void rsi_91x_deinit(struct rsi_hw *adapter);
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int rsi_read_pkt(struct rsi_common *common, s32 rcv_pkt_len);
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#endif
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