| Message ID | 20201101130052.20974-1-stanimir.varbanov@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | venus: pm_helpers: Fix kernel module reload | expand |
On 11/1/2020 6:30 PM, Stanimir Varbanov wrote: > After initial kernel module load during kernel boot and removing > the module and try to load it again an Unable to handle kernel > paging request is observed: > > Unable to handle kernel paging request at virtual address ffffa44f7416eae0 > Mem abort info: > ESR = 0x96000047 > EC = 0x25: DABT (current EL), IL = 32 bits > SET = 0, FnV = 0 > EA = 0, S1PTW = 0 > Data abort info: > ISV = 0, ISS = 0x00000047 > CM = 0, WnR = 1 > swapper pgtable: 4k pages, 48-bit VAs, pgdp=000000008147c000 > [ffffa44f7416eae0] pgd=000000017df9f003, p4d=000000017df9f003, > pud=000000017df9e003, pmd=000000017df9b003, pte=0000000000000000 > Internal error: Oops: 96000047 [#1] PREEMPT SMP > Modules linked in: venus_core(+) snd_soc_wsa881x regmap_sdw af_alg > snd_soc_wcd934x soundwire_qcom gpio_wcd934x q6asm_dai q6routing > q6adm q6afe_dai snd_soc_hdmi_codec q6afe q6asm q6dsp_common q6cor > display_connector rmtfs_mem drm ip_tables x_tables ipv6 > [last unloaded: venus_core] > CPU: 6 PID: 889 Comm: modprobe Tainted: G W 5.10.0-rc1+ #8 > Hardware name: Thundercomm Dragonboard 845c (DT) > pstate: 80400085 (Nzcv daIf +PAN -UAO -TCO BTYPE=--) > pc : queued_spin_lock_slowpath+0x1dc/0x3c8 > lr : do_raw_spin_lock+0xc0/0x118 > sp : ffff8000142cb7b0 > x29: ffff8000142cb7b0 x28: 0000000000000013 > x27: ffffa44f72de5690 x26: 0000000000000003 > x25: ffff17c2d00f8080 x24: ffff17c2c0d78010 > x23: ffff17c2c0d4f700 x22: ffff17c2d00f8080 > x21: 0000000000000000 x20: ffffa44f74148000 > x19: ffff17c2c0d4f8f8 x18: 0000000000000000 > x17: 0000000000000000 x16: ffffa44f7342f158 > x15: 0000000000000040 x14: ffffa44f746e8320 > x13: 0000000000000228 x12: 0000000000000020 > x11: 0000000000000000 x10: 00000000001c0000 > x9 : 0000000000000000 x8 : ffff17c33d746ac0 > x7 : ffff17c2c109b000 x6 : ffffa44f7416eac0 > x5 : ffff17c33d746ac0 x4 : 0000000000000000 > x3 : ffff17c2c0d4f8f8 x2 : ffffa44f7416eae0 > x1 : ffffa44f7416eae0 x0 : ffff17c33d746ac8 > Call trace: > queued_spin_lock_slowpath+0x1dc/0x3c8 > do_raw_spin_lock+0xc0/0x118 > _raw_spin_lock_irqsave+0x80/0x14c > __pm_runtime_resume+0x38/0xb8 > device_link_add+0x3b8/0x5d0 > core_get_v4+0x268/0x2d8 [venus_core] > venus_probe+0x108/0x458 [venus_core] > platform_drv_probe+0x54/0xa8 > really_probe+0xe4/0x3b0 > driver_probe_device+0x58/0xb8 > device_driver_attach+0x74/0x80 > __driver_attach+0x58/0xe8 > bus_for_each_dev+0x70/0xc0 > driver_attach+0x24/0x30 > bus_add_driver+0x150/0x1f8 > driver_register+0x64/0x120 > __platform_driver_register+0x48/0x58 > qcom_venus_driver_init+0x20/0x1000 [venus_core] > do_one_initcall+0x84/0x458 > do_init_module+0x58/0x208 > load_module+0x1ec0/0x26a8 > __do_sys_finit_module+0xb8/0xf8 > __arm64_sys_finit_module+0x20/0x30 > el0_svc_common.constprop.0+0x7c/0x1c0 > do_el0_svc+0x24/0x90 > el0_sync_handler+0x180/0x188 > el0_sync+0x174/0x180 > Code: 91002100 8b0200c2 f861d884 aa0203e1 (f8246828) > ---[ end trace f1f687c15fd6b2ca ]--- > note: modprobe[889] exited with preempt_count 1 > > After revisit the OPP part of the code I found that OPP pmdomain > is detached with direct call to dev_pm_domain_detach instead of > OPP wraper for detaching pmdomains with OPP table. Correct this > by calling the OPP dev_pm_opp_detach_genpd. ah, that seems like the right thing to do. Sorry, looks like I hadn't really tested the cleanup path by loading/unloading the module :/ Reviewed-by: Rajendra Nayak <rnayak@codeaurora.org> > > Fixes: 9a538b83612c ('media: venus: core: Add support for opp tables/perf voting') > Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org> > --- > drivers/media/platform/qcom/venus/pm_helpers.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/media/platform/qcom/venus/pm_helpers.c b/drivers/media/platform/qcom/venus/pm_helpers.c > index 0ebba8e3bd75..2946547a0df4 100644 > --- a/drivers/media/platform/qcom/venus/pm_helpers.c > +++ b/drivers/media/platform/qcom/venus/pm_helpers.c > @@ -804,7 +804,7 @@ static int vcodec_domains_get(struct device *dev) > return 0; > > opp_dl_add_err: > - dev_pm_domain_detach(core->opp_pmdomain, true); > + dev_pm_opp_detach_genpd(core->opp_table); > opp_attach_err: > if (core->pd_dl_venus) { > device_link_del(core->pd_dl_venus); > @@ -842,7 +842,7 @@ static void vcodec_domains_put(struct device *dev) > if (core->opp_dl_venus) > device_link_del(core->opp_dl_venus); > > - dev_pm_domain_detach(core->opp_pmdomain, true); > + dev_pm_opp_detach_genpd(core->opp_table); > } > > static int core_get_v4(struct device *dev) >
diff --git a/drivers/media/platform/qcom/venus/pm_helpers.c b/drivers/media/platform/qcom/venus/pm_helpers.c index 0ebba8e3bd75..2946547a0df4 100644 --- a/drivers/media/platform/qcom/venus/pm_helpers.c +++ b/drivers/media/platform/qcom/venus/pm_helpers.c @@ -804,7 +804,7 @@ static int vcodec_domains_get(struct device *dev) return 0; opp_dl_add_err: - dev_pm_domain_detach(core->opp_pmdomain, true); + dev_pm_opp_detach_genpd(core->opp_table); opp_attach_err: if (core->pd_dl_venus) { device_link_del(core->pd_dl_venus); @@ -842,7 +842,7 @@ static void vcodec_domains_put(struct device *dev) if (core->opp_dl_venus) device_link_del(core->opp_dl_venus); - dev_pm_domain_detach(core->opp_pmdomain, true); + dev_pm_opp_detach_genpd(core->opp_table); } static int core_get_v4(struct device *dev)
After initial kernel module load during kernel boot and removing the module and try to load it again an Unable to handle kernel paging request is observed: Unable to handle kernel paging request at virtual address ffffa44f7416eae0 Mem abort info: ESR = 0x96000047 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 Data abort info: ISV = 0, ISS = 0x00000047 CM = 0, WnR = 1 swapper pgtable: 4k pages, 48-bit VAs, pgdp=000000008147c000 [ffffa44f7416eae0] pgd=000000017df9f003, p4d=000000017df9f003, pud=000000017df9e003, pmd=000000017df9b003, pte=0000000000000000 Internal error: Oops: 96000047 [#1] PREEMPT SMP Modules linked in: venus_core(+) snd_soc_wsa881x regmap_sdw af_alg snd_soc_wcd934x soundwire_qcom gpio_wcd934x q6asm_dai q6routing q6adm q6afe_dai snd_soc_hdmi_codec q6afe q6asm q6dsp_common q6cor display_connector rmtfs_mem drm ip_tables x_tables ipv6 [last unloaded: venus_core] CPU: 6 PID: 889 Comm: modprobe Tainted: G W 5.10.0-rc1+ #8 Hardware name: Thundercomm Dragonboard 845c (DT) pstate: 80400085 (Nzcv daIf +PAN -UAO -TCO BTYPE=--) pc : queued_spin_lock_slowpath+0x1dc/0x3c8 lr : do_raw_spin_lock+0xc0/0x118 sp : ffff8000142cb7b0 x29: ffff8000142cb7b0 x28: 0000000000000013 x27: ffffa44f72de5690 x26: 0000000000000003 x25: ffff17c2d00f8080 x24: ffff17c2c0d78010 x23: ffff17c2c0d4f700 x22: ffff17c2d00f8080 x21: 0000000000000000 x20: ffffa44f74148000 x19: ffff17c2c0d4f8f8 x18: 0000000000000000 x17: 0000000000000000 x16: ffffa44f7342f158 x15: 0000000000000040 x14: ffffa44f746e8320 x13: 0000000000000228 x12: 0000000000000020 x11: 0000000000000000 x10: 00000000001c0000 x9 : 0000000000000000 x8 : ffff17c33d746ac0 x7 : ffff17c2c109b000 x6 : ffffa44f7416eac0 x5 : ffff17c33d746ac0 x4 : 0000000000000000 x3 : ffff17c2c0d4f8f8 x2 : ffffa44f7416eae0 x1 : ffffa44f7416eae0 x0 : ffff17c33d746ac8 Call trace: queued_spin_lock_slowpath+0x1dc/0x3c8 do_raw_spin_lock+0xc0/0x118 _raw_spin_lock_irqsave+0x80/0x14c __pm_runtime_resume+0x38/0xb8 device_link_add+0x3b8/0x5d0 core_get_v4+0x268/0x2d8 [venus_core] venus_probe+0x108/0x458 [venus_core] platform_drv_probe+0x54/0xa8 really_probe+0xe4/0x3b0 driver_probe_device+0x58/0xb8 device_driver_attach+0x74/0x80 __driver_attach+0x58/0xe8 bus_for_each_dev+0x70/0xc0 driver_attach+0x24/0x30 bus_add_driver+0x150/0x1f8 driver_register+0x64/0x120 __platform_driver_register+0x48/0x58 qcom_venus_driver_init+0x20/0x1000 [venus_core] do_one_initcall+0x84/0x458 do_init_module+0x58/0x208 load_module+0x1ec0/0x26a8 __do_sys_finit_module+0xb8/0xf8 __arm64_sys_finit_module+0x20/0x30 el0_svc_common.constprop.0+0x7c/0x1c0 do_el0_svc+0x24/0x90 el0_sync_handler+0x180/0x188 el0_sync+0x174/0x180 Code: 91002100 8b0200c2 f861d884 aa0203e1 (f8246828) ---[ end trace f1f687c15fd6b2ca ]--- note: modprobe[889] exited with preempt_count 1 After revisit the OPP part of the code I found that OPP pmdomain is detached with direct call to dev_pm_domain_detach instead of OPP wraper for detaching pmdomains with OPP table. Correct this by calling the OPP dev_pm_opp_detach_genpd. Fixes: 9a538b83612c ('media: venus: core: Add support for opp tables/perf voting') Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org> --- drivers/media/platform/qcom/venus/pm_helpers.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)