On 31-05-17 13:10, Enric Balletbo Serra wrote: > Hi Arend, > > 2017-05-30 14:35 GMT+02:00 Arend van Spriel <arend.vanspr...@broadcom.com>: >> Hi Enric, >> >> Could you please try these patches and let me know if they resolve >> the issue for you. >> >> Regards, >> Arend >> >> Arend van Spriel (3): >> brcmfmac: add parameter to pass error code in firmware callback >> brcmfmac: use firmware callback upon failure to load >> brcmfmac: unbind all devices upon failure in firmware callback >> >> .../broadcom/brcm80211/brcmfmac/firmware.c | 35 >> +++++++++++----------- >> .../broadcom/brcm80211/brcmfmac/firmware.h | 4 +-- >> .../wireless/broadcom/brcm80211/brcmfmac/pcie.c | 17 +++++++---- >> .../wireless/broadcom/brcm80211/brcmfmac/sdio.c | 18 +++++++---- >> .../net/wireless/broadcom/brcm80211/brcmfmac/usb.c | 6 ++-- >> 5 files changed, 47 insertions(+), 33 deletions(-) >> >> -- >> 1.9.1 >> > > After these patches the error path when firmware is not found seems > the correct way to proceed but I'm still getting the same kernel panic > [1]. > > I added some printk and I saw that when firmware load fails > > [ 7.696463] brcmfmac mmc1:0001:1: Direct firmware load for > brcm/brcmfmac4354-sdio.bin failed with error -2 > > The brcmf_sdio_firmware_callback fails, and goes to the fail label and > the devices are released. > > device_release_driver(dev); > device_release_driver(&sdiodev->func[1]->dev); > > But PM ops are not unregistered for mmc1:0001:2 and > brcmf_ops_sdio_resume is still called, so I'm wondering if you missed > here to add > > device_release_driver(&sdiodev->func[2]->dev); > > Adding that seems to solve the problem, not sure if there is any > collateral effect.
Looking closer at the firmware load failure message it uses mmc1:0001:1, ie. func[1]->dev. I wrongly assume everything was using func[2]->dev hence I added the device_release_driver() call for func[1]->dev. So we are calling device_release_driver() twice for the same device. Just change func[1] into func[2]. Regards, Arend > + info: > > Steps to reproduce the Oops: > > 1. Remove the brcm/brcmfmac4354-sdio.bin firmware > 2. modprobe brcmfmac > [ 6.879679] brcmfmac mmc1:0001:1: Direct firmware load for > brcm/brcmfmac4354-sdio.bin failed with error -2 > 3. Do a suspend/resume cycle > echo mem > /sys/power/state && # hit a key > > [1] Kernel Oops: > > [ 29.375149] Unable to handle kernel NULL pointer dereference at > virtual address 00000000 > [ 29.384270] pgd = c0204000 > [ 29.387310] [00000000] *pgd=00000000 > [ 29.391336] Internal error: Oops: 17 [#1] SMP ARM > [ 29.396628] Modules linked in: cpufreq_powersave cpufreq_userspace > cpufreq_conservative bq27xxx_battery_i2c bq27xxx_battery cros_ec_keyb > i2c_cros_ec_tunnel cros_ec_devs cros_ec_spi cros_ec_core > snd_soc_rockchip_max98090 brcmfmac snd_soc_ts3a227e snd_soc_max98090 > snd_soc_rockchip_i2s cfg80211 snd_soc_core ac97_bus uvcvideo > videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core > videodev snd_pcm_dmaengine brcmutil snd_pcm gpio_charger snd_timer > media nvmem_rockchip_efuse rk_crypto md5 sha256_generic sha1_generic > des_generic phy_rockchip_dp rtc_rk808 snd soundcore pwm_rockchip > rockchipdrm tpm_i2c_infineon dw_hdmi tpm analogix_dp pwm_bl > spi_rockchip > [ 29.461958] CPU: 0 PID: 3030 Comm: kworker/u8:28 Not tainted > 4.12.0-rc2-next-20170529-00003-g38fc31b-dirty #3 > [ 29.473118] Hardware name: Rockchip (Device Tree) > [ 29.478415] Workqueue: events_unbound async_run_entry_fn > [ 29.484384] task: ed6dc200 task.stack: ed27c000 > [ 29.489494] PC is at brcmf_ops_sdio_resume+0x10/0x5c [brcmfmac] > [ 29.496158] LR is at dpm_run_callback+0x38/0x160 > [ 29.501351] pc : [<bf4c0fc0>] lr : [<c087fb70>] psr: 60000113 > [ 29.508394] sp : ed27dec8 ip : 60000113 fp : c1572a54 > [ 29.514262] r10: 00000000 r9 : c0fe196c r8 : 00000010 > [ 29.520131] r7 : c087b900 r6 : 00000000 r5 : ed1b5208 r4 : 00000001 > [ 29.527476] r3 : 00000000 r2 : 00000002 r1 : ed1b5208 r0 : ed1b5208 > [ 29.537127] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment > none > [ 29.547454] Control: 10c5387d Table: 2d75c06a DAC: 00000051 > [ 29.556215] Process kworker/u8:28 (pid: 3030, stack limit = 0xed27c220) > [ 29.565965] Stack: (0xed27dec8 to 0xed27e000) > [ 29.573150] dec0: 00000001 c087fb70 00000001 > ed1b5208 00000000 00000010 > [ 29.584656] dee0: ed1b523c ed27c000 00000000 c08802d4 c15c54fc > ed1b5208 ed542140 ee006500 > [ 29.596172] df00: 00000000 c08804b8 ed542150 c157fda0 ed542140 > c036525c ec820280 ed542150 > [ 29.607694] df20: ee004800 ee006500 00000000 c035cc28 eef914c0 > ee004848 ee004818 ee004800 > [ 29.619249] df40: ec820298 00000088 ee004818 c1402d00 ed27c000 > ee004800 ec820280 c035cf58 > [ 29.630816] df60: ee004960 00000000 ec820280 ec802000 00000000 > ed7d7ac0 ec820280 c035cf20 > [ 29.642397] df80: ec80201c ec96bee8 00000000 c0362358 ed7d7ac0 > c036222c 00000000 00000000 > [ 29.654046] dfa0: 00000000 00000000 00000000 c0307e78 00000000 > 00000000 00000000 00000000 > [ 29.665707] dfc0: 00000000 00000000 00000000 00000000 00000000 > 00000000 00000000 00000000 > [ 29.677322] dfe0: 00000000 00000000 00000000 00000000 00000013 > 00000000 00000000 00000000 > [ 29.688968] [<bf4c0fc0>] (brcmf_ops_sdio_resume [brcmfmac]) from > [<c087fb70>] (dpm_run_callback+0x38/0x160) > [ 29.702379] [<c087fb70>] (dpm_run_callback) from [<c08802d4>] > (device_resume+0x94/0x25c) > [ 29.713951] [<c08802d4>] (device_resume) from [<c08804b8>] > (async_resume+0x1c/0x44) > [ 29.725063] [<c08804b8>] (async_resume) from [<c036525c>] > (async_run_entry_fn+0x44/0x108) > [ 29.736788] [<c036525c>] (async_run_entry_fn) from [<c035cc28>] > (process_one_work+0x14c/0x444) > [ 29.749022] [<c035cc28>] (process_one_work) from [<c035cf58>] > (worker_thread+0x38/0x510) > [ 29.760675] [<c035cf58>] (worker_thread) from [<c0362358>] > (kthread+0x12c/0x15c) > [ 29.771521] [<c0362358>] (kthread) from [<c0307e78>] > (ret_from_fork+0x14/0x3c) > [ 29.782226] Code: e92d4010 e59021a4 e5903054 e3520002 (e5934000) > [ 29.791751] ---[ end trace 035307c5087a8fee ]--- >
