Hi, On 6/22/23 08:03, Shyam Sundar S K wrote: > Power source notify handler is getting registered even when none of the > PMF feature in enabled leading to a crash. > > ... > [ 22.592162] Call Trace: > [ 22.592164] <TASK> > [ 22.592164] ? rcu_note_context_switch+0x5e0/0x660 > [ 22.592166] ? __warn+0x81/0x130 > [ 22.592171] ? rcu_note_context_switch+0x5e0/0x660 > [ 22.592172] ? report_bug+0x171/0x1a0 > [ 22.592175] ? prb_read_valid+0x1b/0x30 > [ 22.592177] ? handle_bug+0x3c/0x80 > [ 22.592178] ? exc_invalid_op+0x17/0x70 > [ 22.592179] ? asm_exc_invalid_op+0x1a/0x20 > [ 22.592182] ? rcu_note_context_switch+0x5e0/0x660 > [ 22.592183] ? acpi_ut_delete_object_desc+0x86/0xb0 > [ 22.592186] ? acpi_ut_update_ref_count.part.0+0x22d/0x930 > [ 22.592187] __schedule+0xc0/0x1410 > [ 22.592189] ? ktime_get+0x3c/0xa0 > [ 22.592191] ? lapic_next_event+0x1d/0x30 > [ 22.592193] ? hrtimer_start_range_ns+0x25b/0x350 > [ 22.592196] schedule+0x5e/0xd0 > [ 22.592197] schedule_hrtimeout_range_clock+0xbe/0x140 > [ 22.592199] ? __pfx_hrtimer_wakeup+0x10/0x10 > [ 22.592200] usleep_range_state+0x64/0x90 > [ 22.592203] amd_pmf_send_cmd+0x106/0x2a0 [amd_pmf bddfe0fe3712aaa99acce3d5487405c5213c6616] > [ 22.592207] amd_pmf_update_slider+0x56/0x1b0 [amd_pmf bddfe0fe3712aaa99acce3d5487405c5213c6616] > [ 22.592210] amd_pmf_set_sps_power_limits+0x72/0x80 [amd_pmf bddfe0fe3712aaa99acce3d5487405c5213c6616] > [ 22.592213] amd_pmf_pwr_src_notify_call+0x49/0x90 [amd_pmf bddfe0fe3712aaa99acce3d5487405c5213c6616] > [ 22.592216] notifier_call_chain+0x5a/0xd0 > [ 22.592218] atomic_notifier_call_chain+0x32/0x50 > ... > > Fix this by moving the registration of source change notify handler only > when SPS(Static Slider) is advertised as supported. > > Reported-by: Allen Zhong <allen@xxxxxx> > Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217571 > Fixes: 4c71ae414474 ("platform/x86/amd/pmf: Add support SPS PMF feature") > Tested-by: Patil Rajesh Reddy <Patil.Reddy@xxxxxxx> > Reviewed-by: Mario Limonciello <mario.limonciello@xxxxxxx> > Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@xxxxxxx> Thank you for your patch, I've applied this patch to my fixes branch: https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=fixes And I have just send a fixes pull-req with this to Linus for the current kernel development cycle. Regards, Hans > --- > drivers/platform/x86/amd/pmf/core.c | 10 +++++----- > 1 file changed, 5 insertions(+), 5 deletions(-) > > diff --git a/drivers/platform/x86/amd/pmf/core.c b/drivers/platform/x86/amd/pmf/core.c > index d5bb775dadcf..a5b8f9bbc0d9 100644 > --- a/drivers/platform/x86/amd/pmf/core.c > +++ b/drivers/platform/x86/amd/pmf/core.c > @@ -280,6 +280,8 @@ static void amd_pmf_init_features(struct amd_pmf_dev *dev) > /* Enable Static Slider */ > if (is_apmf_func_supported(dev, APMF_FUNC_STATIC_SLIDER_GRANULAR)) { > amd_pmf_init_sps(dev); > + dev->pwr_src_notifier.notifier_call = amd_pmf_pwr_src_notify_call; > + power_supply_reg_notifier(&dev->pwr_src_notifier); > dev_dbg(dev->dev, "SPS enabled and Platform Profiles registered\n"); > } > > @@ -298,8 +300,10 @@ static void amd_pmf_init_features(struct amd_pmf_dev *dev) > > static void amd_pmf_deinit_features(struct amd_pmf_dev *dev) > { > - if (is_apmf_func_supported(dev, APMF_FUNC_STATIC_SLIDER_GRANULAR)) > + if (is_apmf_func_supported(dev, APMF_FUNC_STATIC_SLIDER_GRANULAR)) { > + power_supply_unreg_notifier(&dev->pwr_src_notifier); > amd_pmf_deinit_sps(dev); > + } > > if (is_apmf_func_supported(dev, APMF_FUNC_AUTO_MODE)) { > amd_pmf_deinit_auto_mode(dev); > @@ -382,9 +386,6 @@ static int amd_pmf_probe(struct platform_device *pdev) > apmf_install_handler(dev); > amd_pmf_dbgfs_register(dev); > > - dev->pwr_src_notifier.notifier_call = amd_pmf_pwr_src_notify_call; > - power_supply_reg_notifier(&dev->pwr_src_notifier); > - > dev_info(dev->dev, "registered PMF device successfully\n"); > > return 0; > @@ -394,7 +395,6 @@ static void amd_pmf_remove(struct platform_device *pdev) > { > struct amd_pmf_dev *dev = platform_get_drvdata(pdev); > > - power_supply_unreg_notifier(&dev->pwr_src_notifier); > amd_pmf_deinit_features(dev); > apmf_acpi_deinit(dev); > amd_pmf_dbgfs_unregister(dev);
