From: Wright Feng wright.feng@cypress.com
[ Upstream commit 6aa5a83a7ed8036c1388a811eb8bdfa77b21f19c ]
Brcmfmac showed warning message in fweh.c when checking the size of event queue which is not initialized. Therefore, we only cancel the worker and reset event handler only when it is initialized.
[ 145.505899] brcmfmac 0000:02:00.0: brcmf_pcie_setup: Dongle setup [ 145.929970] ------------[ cut here ]------------ [ 145.929994] WARNING: CPU: 0 PID: 288 at drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.c:312 brcmf_fweh_detach+0xbc/0xd0 [brcmfmac] ... [ 145.930029] Call Trace: [ 145.930036] brcmf_detach+0x77/0x100 [brcmfmac] [ 145.930043] brcmf_pcie_remove+0x79/0x130 [brcmfmac] [ 145.930046] pci_device_remove+0x39/0xc0 [ 145.930048] device_release_driver_internal+0x141/0x200 [ 145.930049] device_release_driver+0x12/0x20 [ 145.930054] brcmf_pcie_setup+0x101/0x3c0 [brcmfmac] [ 145.930060] brcmf_fw_request_done+0x11d/0x1f0 [brcmfmac] [ 145.930062] ? lock_timer_base+0x7d/0xa0 [ 145.930063] ? internal_add_timer+0x1f/0xa0 [ 145.930064] ? add_timer+0x11a/0x1d0 [ 145.930066] ? __kmalloc_track_caller+0x18c/0x230 [ 145.930068] ? kstrdup_const+0x23/0x30 [ 145.930069] ? add_dr+0x46/0x80 [ 145.930070] ? devres_add+0x3f/0x50 [ 145.930072] ? usermodehelper_read_unlock+0x15/0x20 [ 145.930073] ? _request_firmware+0x288/0xa20 [ 145.930075] request_firmware_work_func+0x36/0x60 [ 145.930077] process_one_work+0x144/0x360 [ 145.930078] worker_thread+0x4d/0x3c0 [ 145.930079] kthread+0x112/0x150 [ 145.930080] ? rescuer_thread+0x340/0x340 [ 145.930081] ? kthread_park+0x60/0x60 [ 145.930083] ret_from_fork+0x25/0x30
Signed-off-by: Wright Feng wright.feng@cypress.com Signed-off-by: Chi-hsien Lin chi-hsien.lin@cypress.com Signed-off-by: Kalle Valo kvalo@codeaurora.org Link: https://lore.kernel.org/r/20200928054922.44580-3-wright.feng@cypress.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../net/wireless/broadcom/brcm80211/brcmfmac/fweh.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.c index a5cced2c89ac6..921b94c4f5f9a 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.c @@ -304,10 +304,12 @@ void brcmf_fweh_detach(struct brcmf_pub *drvr) { struct brcmf_fweh_info *fweh = &drvr->fweh;
- /* cancel the worker */ - cancel_work_sync(&fweh->event_work); - WARN_ON(!list_empty(&fweh->event_q)); - memset(fweh->evt_handler, 0, sizeof(fweh->evt_handler)); + /* cancel the worker if initialized */ + if (fweh->event_work.func) { + cancel_work_sync(&fweh->event_work); + WARN_ON(!list_empty(&fweh->event_q)); + memset(fweh->evt_handler, 0, sizeof(fweh->evt_handler)); + } }
/**