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| Started by | priyalee.kushwaha@intel.com |
|---|---|
| First post | 2017-05-31 23:40 +0200 |
| Last post | 2017-06-01 00:40 +0200 |
| Articles | 3 — 3 participants |
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[PATCH v2 1/1] intel_telemetry_debugfs: fix oops found while load/unload module test priyalee.kushwaha@intel.com - 2017-05-31 23:40 +0200
Re: [PATCH v2 1/1] intel_telemetry_debugfs: fix oops found while load/unload module test Andy Shevchenko <andy.shevchenko@gmail.com> - 2017-06-01 00:20 +0200
RE: [PATCH v2 1/1] intel_telemetry_debugfs: fix oops found while load/unload module test "Kushwaha, Priyalee" <priyalee.kushwaha@intel.com> - 2017-06-01 00:40 +0200
| From | priyalee.kushwaha@intel.com |
|---|---|
| Date | 2017-05-31 23:40 +0200 |
| Subject | [PATCH v2 1/1] intel_telemetry_debugfs: fix oops found while load/unload module test |
| Message-ID | <tNjvr-20L-5@gated-at.bofh.it> |
From: Priyalee Kushwaha <priyalee.kushwaha@intel.com>
This fix oops found while testing load/unload test of
intel_telemetry_debugfs module. Module_init uses register_pm_notifier
for PM callbacks, but unregister_pm_notifier was missing from
module_exit.
[ 97.481860] BUG: unable to handle kernel paging request at ffffffffa006f010
[ 97.489742] IP: blocking_notifier_chain_register+0x3a/0xa0
[ 97.495898] PGD 2e0a067
[ 97.495899] PUD 2e0b063
[ 97.498737] PMD 179e29067
[ 97.501573] PTE 0
[ 97.508423] Oops: 0000 1 PREEMPT SMP
[ 97.512724] Modules linked in: intel_telemetry_debugfs intel_rapl gpio_keys dwc3 udc_core intel_telemetry_pltdrv intel_punit_ipc intel_telemetry_core rtc_cmos efivars x86_pkg_temp_thermal iwlwifi snd_hda_codec_hdmi soc_button_array btusb cfg80211 btrtl mei_me hci_uart btbcm mei btintel i915 bluetooth intel_pmc_ipc snd_hda_intel spi_pxa2xx_platform snd_hda_codec dwc3_pci snd_hda_core tpm_tis tpm_tis_core tpm efivarfs
[ 97.558453] CPU: 0 PID: 889 Comm: modprobe Not tainted 4.11.0-rc6-intel-dev-bkc #1
[ 97.566950] Hardware name: Intel Corp. Joule DVT3/SDS, BIOS GTPP181A.X64.0143.B30.1701132137 01/13/2017
[ 97.577518] task: ffff8801793a21c0 task.stack: ffff8801793f0000
[ 97.584162] RIP: 0010:blocking_notifier_chain_register+0x3a/0xa0
[ 97.590903] RSP: 0018:ffff8801793f3c58 EFLAGS: 00010286
[ 97.596802] RAX: ffffffffa006f000 RBX: ffffffff81e3ea20 RCX: 0000000000000000
[ 97.604812] RDX: ffff880179eaf210 RSI: ffffffffa0131000 RDI: ffffffff81e3ea20
[ 97.612821] RBP: ffff8801793f3c68 R08: 0000000000000006 R09: 000000000000005c
[ 97.620847] R10: 0000000000000000 R11: 0000000000000006 R12: ffffffffa0131000
[ 97.628855] R13: 0000000000000000 R14: ffff880176e35f48 R15: ffff8801793f3ea8
[ 97.636865] FS: 00007f7eeba07700(0000) GS:ffff88017fc00000(0000) knlGS:0000000000000000
[ 97.645948] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 97.652423] CR2: ffffffffa006f010 CR3: 00000001775ef000 CR4: 00000000003406f0
[ 97.660423] Call Trace:
[ 97.663166] ? 0xffffffffa0031000
[ 97.666885] register_pm_notifier+0x18/0x20
[ 97.671581] telemetry_debugfs_init+0x92/0x1000
Signed-off-by: Priyalee Kushwaha <priyalee.kushwaha@intel.com>
---
drivers/platform/x86/intel_telemetry_debugfs.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/platform/x86/intel_telemetry_debugfs.c b/drivers/platform/x86/intel_telemetry_debugfs.c
index ef29f18..30f70b5 100644
--- a/drivers/platform/x86/intel_telemetry_debugfs.c
+++ b/drivers/platform/x86/intel_telemetry_debugfs.c
@@ -966,8 +966,10 @@ static int __init telemetry_debugfs_init(void)
#endif /* CONFIG_PM_SLEEP */
debugfs_conf->telemetry_dbg_dir = debugfs_create_dir("telemetry", NULL);
- if (!debugfs_conf->telemetry_dbg_dir)
- return -ENOMEM;
+ if (!debugfs_conf->telemetry_dbg_dir) {
+ err = -ENOMEM;
+ goto out_pm;
+ }
f = debugfs_create_file("pss_info", S_IFREG | S_IRUGO,
debugfs_conf->telemetry_dbg_dir, NULL,
@@ -1014,6 +1016,10 @@ static int __init telemetry_debugfs_init(void)
out:
debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
debugfs_conf->telemetry_dbg_dir = NULL;
+out_pm:
+#ifdef CONFIG_PM_SLEEP
+ unregister_pm_notifier(&pm_notifier);
+#endif /* CONFIG_PM_SLEEP */
return err;
}
@@ -1022,6 +1028,9 @@ static void __exit telemetry_debugfs_exit(void)
{
debugfs_remove_recursive(debugfs_conf->telemetry_dbg_dir);
debugfs_conf->telemetry_dbg_dir = NULL;
+#ifdef CONFIG_PM_SLEEP
+ unregister_pm_notifier(&pm_notifier);
+#endif /* CONFIG_PM_SLEEP */
}
late_initcall(telemetry_debugfs_init);
--
2.10.0
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| From | Andy Shevchenko <andy.shevchenko@gmail.com> |
|---|---|
| Date | 2017-06-01 00:20 +0200 |
| Subject | Re: [PATCH v2 1/1] intel_telemetry_debugfs: fix oops found while load/unload module test |
| Message-ID | <tNk89-2vg-15@gated-at.bofh.it> |
| In reply to | #1654641 |
On Fri, Jun 2, 2017 at 12:33 AM, <priyalee.kushwaha@intel.com> wrote: > This fix oops found while testing load/unload test of > intel_telemetry_debugfs module. Module_init uses register_pm_notifier > for PM callbacks, but unregister_pm_notifier was missing from > module_exit. > +#ifdef CONFIG_PM_SLEEP > + unregister_pm_notifier(&pm_notifier); > +#endif /* CONFIG_PM_SLEEP */ Neither here > +#ifdef CONFIG_PM_SLEEP > + unregister_pm_notifier(&pm_notifier); > +#endif /* CONFIG_PM_SLEEP */ Not there. AFAIU we discussed to make unregister_pm_notifier() having stubs for !PM_SLEEP. -- With Best Regards, Andy Shevchenko
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| From | "Kushwaha, Priyalee" <priyalee.kushwaha@intel.com> |
|---|---|
| Date | 2017-06-01 00:40 +0200 |
| Subject | RE: [PATCH v2 1/1] intel_telemetry_debugfs: fix oops found while load/unload module test |
| Message-ID | <tNkrw-2Bv-5@gated-at.bofh.it> |
| In reply to | #1654676 |
I noticed that both register_pm_notifier and unregister_pm_notifier() has no-op defined already for !CONFIG_PM_SLEEP. So don’t need to check flag anywhere. Thanks for feedback. -----Original Message----- From: Andy Shevchenko [mailto:andy.shevchenko@gmail.com] Sent: Wednesday, May 31, 2017 3:13 PM To: Kushwaha, Priyalee <priyalee.kushwaha@intel.com> Cc: dvhart@infradead.org; Chakravarty, Souvik K <souvik.k.chakravarty@intel.com>; Andy Shevchenko <andy@infradead.org>; linux-kernel@vger.kernel.org; Platform Driver <platform-driver-x86@vger.kernel.org> Subject: Re: [PATCH v2 1/1] intel_telemetry_debugfs: fix oops found while load/unload module test On Fri, Jun 2, 2017 at 12:33 AM, <priyalee.kushwaha@intel.com> wrote: > This fix oops found while testing load/unload test of > intel_telemetry_debugfs module. Module_init uses register_pm_notifier > for PM callbacks, but unregister_pm_notifier was missing from > module_exit. > +#ifdef CONFIG_PM_SLEEP > + unregister_pm_notifier(&pm_notifier); > +#endif /* CONFIG_PM_SLEEP */ Neither here > +#ifdef CONFIG_PM_SLEEP > + unregister_pm_notifier(&pm_notifier); > +#endif /* CONFIG_PM_SLEEP */ Not there. AFAIU we discussed to make unregister_pm_notifier() having stubs for !PM_SLEEP. -- With Best Regards, Andy Shevchenko
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