diff options
author | Even Xu <even.xu@intel.com> | 2016-02-12 04:11:34 +0800 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-06-26 08:06:33 +0800 |
commit | ab17de60ceaa10ef48f39afe9753f63f0fc80037 (patch) | |
tree | 1eaa43c97e8097c85b6b98f03438d0cc73258790 /drivers/hid/intel-ish-hid | |
parent | e3e6bd6a14761942a93ffef884f954764ddca39e (diff) |
HID: intel_ish-hid: ipc: register more pm callbacks to support hibernation
commit ebeaa367548e9e92dd9374b9464ff6e7d157117b upstream.
Current ISH driver only registers suspend/resume PM callbacks which don't
support hibernation (suspend to disk). Basically after hiberation, the ISH
can't resume properly and user may not see sensor events (for example: screen
rotation may not work).
User will not see a crash or panic or anything except the following message
in log:
hid-sensor-hub 001F:8086:22D8.0001: timeout waiting for response from ISHTP device
So this patch adds support for S4/hiberbation to ISH by using the
SIMPLE_DEV_PM_OPS() MACRO instead of struct dev_pm_ops directly. The suspend
and resume functions will now be used for both suspend to RAM and hibernation.
If power management is disabled, SIMPLE_DEV_PM_OPS will do nothing, the suspend
and resume related functions won't be used, so mark them as __maybe_unused to
clarify that this is the intended behavior, and remove #ifdefs for power
management.
Cc: stable@vger.kernel.org
Signed-off-by: Even Xu <even.xu@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hid/intel-ish-hid')
-rw-r--r-- | drivers/hid/intel-ish-hid/ipc/pci-ish.c | 22 |
1 files changed, 7 insertions, 15 deletions
diff --git a/drivers/hid/intel-ish-hid/ipc/pci-ish.c b/drivers/hid/intel-ish-hid/ipc/pci-ish.c index 20d824f74f99..90d7be08fea0 100644 --- a/drivers/hid/intel-ish-hid/ipc/pci-ish.c +++ b/drivers/hid/intel-ish-hid/ipc/pci-ish.c @@ -204,8 +204,7 @@ static void ish_remove(struct pci_dev *pdev) kfree(ishtp_dev); } -#ifdef CONFIG_PM -static struct device *ish_resume_device; +static struct device __maybe_unused *ish_resume_device; /* 50ms to get resume response */ #define WAIT_FOR_RESUME_ACK_MS 50 @@ -219,7 +218,7 @@ static struct device *ish_resume_device; * in that case a simple resume message is enough, others we need * a reset sequence. */ -static void ish_resume_handler(struct work_struct *work) +static void __maybe_unused ish_resume_handler(struct work_struct *work) { struct pci_dev *pdev = to_pci_dev(ish_resume_device); struct ishtp_device *dev = pci_get_drvdata(pdev); @@ -261,7 +260,7 @@ static void ish_resume_handler(struct work_struct *work) * * Return: 0 to the pm core */ -static int ish_suspend(struct device *device) +static int __maybe_unused ish_suspend(struct device *device) { struct pci_dev *pdev = to_pci_dev(device); struct ishtp_device *dev = pci_get_drvdata(pdev); @@ -287,7 +286,7 @@ static int ish_suspend(struct device *device) return 0; } -static DECLARE_WORK(resume_work, ish_resume_handler); +static __maybe_unused DECLARE_WORK(resume_work, ish_resume_handler); /** * ish_resume() - ISH resume callback * @device: device pointer @@ -296,7 +295,7 @@ static DECLARE_WORK(resume_work, ish_resume_handler); * * Return: 0 to the pm core */ -static int ish_resume(struct device *device) +static int __maybe_unused ish_resume(struct device *device) { struct pci_dev *pdev = to_pci_dev(device); struct ishtp_device *dev = pci_get_drvdata(pdev); @@ -310,21 +309,14 @@ static int ish_resume(struct device *device) return 0; } -static const struct dev_pm_ops ish_pm_ops = { - .suspend = ish_suspend, - .resume = ish_resume, -}; -#define ISHTP_ISH_PM_OPS (&ish_pm_ops) -#else -#define ISHTP_ISH_PM_OPS NULL -#endif /* CONFIG_PM */ +static SIMPLE_DEV_PM_OPS(ish_pm_ops, ish_suspend, ish_resume); static struct pci_driver ish_driver = { .name = KBUILD_MODNAME, .id_table = ish_pci_tbl, .probe = ish_probe, .remove = ish_remove, - .driver.pm = ISHTP_ISH_PM_OPS, + .driver.pm = &ish_pm_ops, }; module_pci_driver(ish_driver); |