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Subject: Re: [PATCH] ath11k: fix kernel panic during unload/load ath11k
 modules
From:   Kalle Valo <kvalo@kernel.org>
In-Reply-To: <1642583973-21599-1-git-send-email-quic_vnaralas@quicinc.com>
References: <1642583973-21599-1-git-send-email-quic_vnaralas@quicinc.com>
To:     Venkateswara Naralasetty <quic_vnaralas@quicinc.com>
Cc:     <ath11k@lists.infradead.org>, <linux-wireless@vger.kernel.org>,
        Venkateswara Naralasetty <quic_vnaralas@quicinc.com>
User-Agent: pwcli/0.1.0-git (https://github.com/kvalo/pwcli/) Python/3.7.3
Message-ID: <164363755329.22527.8615778037312611873.kvalo@kernel.org>
Date:   Mon, 31 Jan 2022 13:59:14 +0000 (UTC)
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Venkateswara Naralasetty <quic_vnaralas@quicinc.com> wrote:

> Call netif_napi_del() from ath11k_ahb_free_ext_irq() to fix
> the following kernel panic when unload/load ath11k modules
> for few iterations.
> 
> [  971.201365] Unable to handle kernel paging request at virtual address 6d97a208
> [  971.204227] pgd = 594c2919
> [  971.211478] [6d97a208] *pgd=00000000
> [  971.214120] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
> [  971.412024] CPU: 2 PID: 4435 Comm: insmod Not tainted 5.4.89 #0
> [  971.434256] Hardware name: Generic DT based system
> [  971.440165] PC is at napi_by_id+0x10/0x40
> [  971.445019] LR is at netif_napi_add+0x160/0x1dc
> 
> [  971.743127] (napi_by_id) from [<807d89a0>] (netif_napi_add+0x160/0x1dc)
> [  971.751295] (netif_napi_add) from [<7f1209ac>] (ath11k_ahb_config_irq+0xf8/0x414 [ath11k_ahb])
> [  971.759164] (ath11k_ahb_config_irq [ath11k_ahb]) from [<7f12135c>] (ath11k_ahb_probe+0x40c/0x51c [ath11k_ahb])
> [  971.768567] (ath11k_ahb_probe [ath11k_ahb]) from [<80666864>] (platform_drv_probe+0x48/0x94)
> [  971.779670] (platform_drv_probe) from [<80664718>] (really_probe+0x1c8/0x450)
> [  971.789389] (really_probe) from [<80664cc4>] (driver_probe_device+0x15c/0x1b8)
> [  971.797547] (driver_probe_device) from [<80664f60>] (device_driver_attach+0x44/0x60)
> [  971.805795] (device_driver_attach) from [<806650a0>] (__driver_attach+0x124/0x140)
> [  971.814822] (__driver_attach) from [<80662adc>] (bus_for_each_dev+0x58/0xa4)
> [  971.823328] (bus_for_each_dev) from [<80663a2c>] (bus_add_driver+0xf0/0x1e8)
> [  971.831662] (bus_add_driver) from [<806658a4>] (driver_register+0xa8/0xf0)
> [  971.839822] (driver_register) from [<8030269c>] (do_one_initcall+0x78/0x1ac)
> [  971.847638] (do_one_initcall) from [<80392524>] (do_init_module+0x54/0x200)
> [  971.855968] (do_init_module) from [<803945b0>] (load_module+0x1e30/0x1ffc)
> [  971.864126] (load_module) from [<803948b0>] (sys_init_module+0x134/0x17c)
> [  971.871852] (sys_init_module) from [<80301000>] (ret_fast_syscall+0x0/0x50)
> 
> Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.6.0.1-00760-QCAHKSWPL_SILICONZ-1
> 
> Signed-off-by: Venkateswara Naralasetty <quic_vnaralas@quicinc.com>
> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>

Patch applied to ath-next branch of ath.git, thanks.

22b59cb965f7 ath11k: fix kernel panic during unload/load ath11k modules

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/1642583973-21599-1-git-send-email-quic_vnaralas@quicinc.com/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches