Hi Stefan,
> This patch series improves the load/unload of bcm2835 camera and audio
> drivers. It has been tested with Raspberry Pi 3 B and a camera module V1.
>
> This series based on current linux-next and Phil Elwell's series ("Improve VCHIQ
> cache line size handling"). After Nicolas' series ("staging: vc04_services:
> Some dead code removal") has been applied, i will rebase my series.
I tried testing this series applied to 4.20 with the camera module. I
tried with qv4l2 (from v4l-utils) and using cheese, which in turn uses
gstreamer. I basically get the same crash for both options. Desktop is
LXDE on 32 bit Fedora 29.
I've not yet tried with 5.0-rc1 but it looks like it has this patch
series and some other bits for the vchiq drivers in staging.
Peter
[ 231.121704] bcm2835-v4l2: Failed enabling camera, ret -2
[ 231.127168] bcm2835-v4l2: Failed to enable camera
[ 231.132030] ------------[ cut here ]------------
[ 231.136852] WARNING: CPU: 2 PID: 1473 at
drivers/media/common/videobuf2/videobuf2-core.c:1468
vb2_start_streaming+0xb4/0x12c [videobuf2_common]
[ 231.149967] Modules linked in: fuse ip6t_rpfilter ip6t_REJECT
nf_reject_ipv6 xt_conntrack ebtable_nat ip6table_nat nf_nat_ipv6
ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat_ipv4
nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack
nf_defrag_ipv6 nf_defrag_ipv4 libcrc32c ip_set nfnetlink
ebtable_filter ebtables ip6table_filter ip6_tables cmac bnep sunrpc
vfat fat brcmfmac brcmutil vc4 cfg80211 snd_soc_core bcm2835_v4l2(C)
ac97_bus snd_bcm2835(C) videobuf2_vmalloc snd_pcm_dmaengine
videobuf2_memops snd_seq videobuf2_v4l2 videobuf2_common
snd_seq_device v4l2_common snd_pcm videodev media snd_timer snd
soundcore drm_kms_helper drm hci_uart btqca joydev btbcm btintel
fb_sys_fops syscopyarea bluetooth sysfillrect gpio_raspberrypi_exp
sysimgblt raspberrypi_hwmon bcm2835_thermal ecdh_generic vchiq(C)
rfkill bcm2835_wdt bcm2835_rng leds_gpio cpufreq_dt lz4 lz4_compress
zram hid_logitech_hidpp hid_logitech_dj smsc95xx usbnet mii mmc_block
dwc2 sdhci_iproc crc32_arm_ce
[ 231.150208] sdhci_pltfm udc_core sdhci bcm2835 pwm_bcm2835
i2c_bcm2835 bcm2835_dma phy_generic
[ 231.248013] CPU: 2 PID: 1473 Comm: qv4l2 Tainted: G C
4.20.0-1.fc30.armv7hl #1
[ 231.256663] Hardware name: BCM2835
[ 231.260144] [<c03127a4>] (unwind_backtrace) from [<c030cbf0>]
(show_stack+0x18/0x1c)
[ 231.268013] [<c030cbf0>] (show_stack) from [<c0b14340>]
(dump_stack+0x80/0xa0)
[ 231.275357] [<c0b14340>] (dump_stack) from [<c03507b4>] (__warn+0xdc/0xf8)
[ 231.282349] [<c03507b4>] (__warn) from [<c0350b28>]
(warn_slowpath_null+0x40/0x4c)
[ 231.290067] [<c0350b28>] (warn_slowpath_null) from [<bf4d82d4>]
(vb2_start_streaming+0xb4/0x12c [videobuf2_common])
[ 231.300747] [<bf4d82d4>] (vb2_start_streaming [videobuf2_common])
from [<bf4d978c>] (vb2_core_streamon+0x110/0x138 [videobuf2_common])
[ 231.313166] [<bf4d978c>] (vb2_core_streamon [videobuf2_common])
from [<bf44ea34>] (__video_do_ioctl+0x35c/0x494 [videodev])
[ 231.324681] [<bf44ea34>] (__video_do_ioctl [videodev]) from
[<bf44f19c>] (video_usercopy+0x508/0x5d4 [videodev])
[ 231.335120] [<bf44f19c>] (video_usercopy [videodev]) from
[<c04ffae0>] (vfs_ioctl+0x28/0x3c)
[ 231.343697] [<c04ffae0>] (vfs_ioctl) from [<c0500300>]
(do_vfs_ioctl+0x8c/0x838)
[ 231.351212] [<c0500300>] (do_vfs_ioctl) from [<c0500b04>]
(ksys_ioctl+0x58/0x74)
[ 231.358726] [<c0500b04>] (ksys_ioctl) from [<c0301000>]
(ret_fast_syscall+0x0/0x54)
[ 231.366493] Exception stack(0xd7d53fa8 to 0xd7d53ff0)
[ 231.371623] 3fa0: 4a1bf700 b5edd000 0000000c
40045612 be905378 00000001
[ 231.379930] 3fc0: 4a1bf700 b5edd000 40045612 00000036 b5e40e40
0000000c b6f00508 00000000
[ 231.388230] 3fe0: be905378 be905368 b5ec6804 b5b9a1f0
[ 231.393434] ---[ end trace c5943cec7bb25669 ]---
[ 237.695591] list_add corruption. prev->next should be next
(ea4493e0), but was efeb6638. (prev=e126fa78).
[ 237.705362] ------------[ cut here ]------------
[ 237.710056] kernel BUG at lib/list_debug.c:28!
[ 237.714569] Internal error: Oops - BUG: 0 [#1] SMP ARM
[ 237.719785] Modules linked in: fuse ip6t_rpfilter ip6t_REJECT
nf_reject_ipv6 xt_conntrack ebtable_nat ip6table_nat nf_nat_ipv6
ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat_ipv4
nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack
nf_defrag_ipv6 nf_defrag_ipv4 libcrc32c ip_set nfnetlink
ebtable_filter ebtables ip6table_filter ip6_tables cmac bnep sunrpc
vfat fat brcmfmac brcmutil vc4 cfg80211 snd_soc_core bcm2835_v4l2(C)
ac97_bus snd_bcm2835(C) videobuf2_vmalloc snd_pcm_dmaengine
videobuf2_memops snd_seq videobuf2_v4l2 videobuf2_common
snd_seq_device v4l2_common snd_pcm videodev media snd_timer snd
soundcore drm_kms_helper drm hci_uart btqca joydev btbcm btintel
fb_sys_fops syscopyarea bluetooth sysfillrect gpio_raspberrypi_exp
sysimgblt raspberrypi_hwmon bcm2835_thermal ecdh_generic vchiq(C)
rfkill bcm2835_wdt bcm2835_rng leds_gpio cpufreq_dt lz4 lz4_compress
zram hid_logitech_hidpp hid_logitech_dj smsc95xx usbnet mii mmc_block
dwc2 sdhci_iproc crc32_arm_ce
[ 237.720008] sdhci_pltfm udc_core sdhci bcm2835 pwm_bcm2835
i2c_bcm2835 bcm2835_dma phy_generic
[ 237.817717] CPU: 1 PID: 1473 Comm: qv4l2 Tainted: G WC
4.20.0-1.fc30.armv7hl #1
[ 237.826365] Hardware name: BCM2835
[ 237.829831] PC is at __list_add_valid+0x44/0x84
[ 237.834426] LR is at __list_add_valid+0x44/0x84
[ 237.839020] pc : [<c069b958>] lr : [<c069b958>] psr: 600f0093
[ 237.845377] sp : d7d53da0 ip : 00000000 fp : 00000001
[ 237.850676] r10: 600f0013 r9 : ea4493e0 r8 : ea4493e8
[ 237.855979] r7 : eb773000 r6 : eb773278 r5 : e126fa78 r4 : ea449358
[ 237.862602] r3 : ef707cb0 r2 : 2e5c6000 r1 : ef704548 r0 : 0000005d
[ 237.869226] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM
Segment none
[ 237.876555] Control: 10c5383d Table: 17d0406a DAC: 00000051
[ 237.882390] Process qv4l2 (pid: 1473, stack limit = 0xdf044251)
[ 237.888394] Stack: (0xd7d53da0 to 0xd7d54000)
[ 237.892823] 3da0: ea449358 bf55f20c ea31f800 eb773000 ea31fe24
bf44aa08 ea31fb80 d7d53e78
[ 237.901130] 3dc0: bf467200 bf55a22c eb773000 00000000 00000001
ea31fd28 eb773000 bf4d8278
[ 237.909435] 3de0: ea31fd28 00000000 ea31f858 bf44aa08 ea31fb80
bf4d978c 40045612 bf44ea34
[ 237.917738] 3e00: d7d53e2c c04babd4 ef8eb210 bf5601f4 ecf68f00
00000000 d7c51900 ecf68f00
[ 237.926042] 3e20: c124f850 00000004 d7d53e7c c04c0b88 d7d53e78
c031691c d7d53e78 00000000
[ 237.934345] 3e40: d7d53e78 00000000 bf44e6d8 40045612 00000000
00000004 00000000 bf44f19c
[ 237.942648] 3e60: 0007ffff 00000000 00000000 be9052b0 d7c51900
00000001 00000001 00000001
[ 237.950949] 3e80: 00000000 00002003 00000000 00000000 00000000
00000000 00000000 00000000
[ 237.959251] 3ea0: 00000000 00000000 00000001 00240000 000c0000
00000000 00000000 00000000
[ 237.967560] 3ec0: 00002000 00000000 ac5f2000 ec4171e0 ed793cd8
ed793cd0 ac5f2000 c049bac8
[ 237.975863] 3ee0: 00000001 00000003 000c0000 c0b29c74 00000000
c0b29c74 c2c46570 be9052b0
[ 237.984167] 3f00: c2c46570 d7c51900 40045612 be9052b0 0000000c
00000036 00000000 c04ffae0
[ 237.992470] 3f20: be9052b0 c0500300 00000001 00000056 00000012
d7d53f48 00000001 ef1fee10
[ 238.000775] 3f40: ee4e3660 d7d55612 d7d53f0b d7d53f3c 00400100
00000000 d7d53f58 c126aa48
[ 238.009079] 3f60: d7c51900 40045612 00000000 d7c51900 d7c51901
40045612 be9052b0 0000000c
[ 238.017383] 3f80: 00000036 c0500b04 4a1bf700 b5edd000 40045612
00000036 c0301204 d7d52000
[ 238.025686] 3fa0: 00000036 c0301000 4a1bf700 b5edd000 0000000c
40045612 be9052b0 00000001
[ 238.033990] 3fc0: 4a1bf700 b5edd000 40045612 00000036 b5e40e40
0000000c b6f00508 00000000
[ 238.042293] 3fe0: be9052b0 be9052a0 b5ec6804 b5b9a1f0 400f0010
0000000c 00000000 00000000
[ 238.050651] [<c069b958>] (__list_add_valid) from [<bf55f20c>]
(vchiq_mmal_submit_buffer+0x4c/0x74 [bcm2835_v4l2])
[ 238.061170] [<bf55f20c>] (vchiq_mmal_submit_buffer [bcm2835_v4l2])
from [<bf55a22c>] (buffer_queue+0x58/0x90 [bcm2835_v4l2])
[ 238.072618] [<bf55a22c>] (buffer_queue [bcm2835_v4l2]) from
[<bf4d8278>] (vb2_start_streaming+0x58/0x12c [videobuf2_common])
[ 238.084053] [<bf4d8278>] (vb2_start_streaming [videobuf2_common])
from [<bf4d978c>] (vb2_core_streamon+0x110/0x138 [videobuf2_common])
[ 238.096479] [<bf4d978c>] (vb2_core_streamon [videobuf2_common])
from [<bf44ea34>] (__video_do_ioctl+0x35c/0x494 [videodev])
[ 238.107976] [<bf44ea34>] (__video_do_ioctl [videodev]) from
[<bf44f19c>] (video_usercopy+0x508/0x5d4 [videodev])
[ 238.118414] [<bf44f19c>] (video_usercopy [videodev]) from
[<c04ffae0>] (vfs_ioctl+0x28/0x3c)
[ 238.126988] [<c04ffae0>] (vfs_ioctl) from [<c0500300>]
(do_vfs_ioctl+0x8c/0x838)
[ 238.134502] [<c0500300>] (do_vfs_ioctl) from [<c0500b04>]
(ksys_ioctl+0x58/0x74)
[ 238.142019] [<c0500b04>] (ksys_ioctl) from [<c0301000>]
(ret_fast_syscall+0x0/0x54)
[ 238.149787] Exception stack(0xd7d53fa8 to 0xd7d53ff0)
[ 238.154915] 3fa0: 4a1bf700 b5edd000 0000000c
40045612 be9052b0 00000001
[ 238.163219] 3fc0: 4a1bf700 b5edd000 40045612 00000036 b5e40e40
0000000c b6f00508 00000000
[ 238.171519] 3fe0: be9052b0 be9052a0 b5ec6804 b5b9a1f0
[ 238.176657] Code: e59f0040 e1a02001 e1a0100c ebf44a37 (e7f001f2)
[ 238.182843] ---[ end trace c5943cec7bb2566a ]---
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