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SubjectRE: [PATCH v6 3/4] misc: rtsx: Cleanup power management ops
Date


> -----Original Message-----
> From: Kai-Heng Feng <kai.heng.feng@canonical.com>
> Sent: Tuesday, January 25, 2022 1:50 PM
> To: arnd@arndb.de; gregkh@linuxfoundation.org; ulf.hansson@linaro.org
> Cc: linux-pm@vger.kernel.org; Kai-Heng Feng <kai.heng.feng@canonical.com>;
> Ricky WU <ricky_wu@realtek.com>; Christophe JAILLET
> <christophe.jaillet@wanadoo.fr>; Yang Li <yang.lee@linux.alibaba.com>;
> linux-kernel@vger.kernel.org
> Subject: [PATCH v6 3/4] misc: rtsx: Cleanup power management ops
>
> - Use cancel_delayed_work_sync to ensure there's no race with
> carddet_work.
>
> - Remove device_wakeup_disable to save some CPU cycles. If the device
> really has ACPI _DSW then the wakeup should be disabled in probe
> routine.
>
> - Remove fetch_vendor_settings from runtime resume routine, since they
> are already saved in "struct rtsx_pcr".
>
> - Move variable assignments to the top of the functions.
>
> Cc: Ricky WU <ricky_wu@realtek.com>
Tested-by: Ricky WU <ricky_wu@realtek.com>
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
> ---
> v6:
> v5:
> - No change.
>
> v4:
> - Move variable assignments to the top of the functions.
>
> v3:
> v2:
> - No change.
>
> drivers/misc/cardreader/rtsx_pcr.c | 34 ++++++++----------------------
> 1 file changed, 9 insertions(+), 25 deletions(-)
>
> diff --git a/drivers/misc/cardreader/rtsx_pcr.c
> b/drivers/misc/cardreader/rtsx_pcr.c
> index 8aba47a7d9736..3c97d3b50456e 100644
> --- a/drivers/misc/cardreader/rtsx_pcr.c
> +++ b/drivers/misc/cardreader/rtsx_pcr.c
> @@ -1660,22 +1660,17 @@ static void rtsx_pci_remove(struct pci_dev
> *pcidev) static int __maybe_unused rtsx_pci_suspend(struct device *dev_d)
> {
> struct pci_dev *pcidev = to_pci_dev(dev_d);
> - struct pcr_handle *handle;
> - struct rtsx_pcr *pcr;
> + struct pcr_handle *handle = pci_get_drvdata(pcidev);
> + struct rtsx_pcr *pcr = handle->pcr;
>
> dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
>
> - handle = pci_get_drvdata(pcidev);
> - pcr = handle->pcr;
> -
> - cancel_delayed_work(&pcr->carddet_work);
> + cancel_delayed_work_sync(&pcr->carddet_work);
>
> mutex_lock(&pcr->pcr_mutex);
>
> rtsx_pci_power_off(pcr, HOST_ENTER_S3);
>
> - device_wakeup_disable(dev_d);
> -
> mutex_unlock(&pcr->pcr_mutex);
> return 0;
> }
> @@ -1683,15 +1678,12 @@ static int __maybe_unused
> rtsx_pci_suspend(struct device *dev_d) static int __maybe_unused
> rtsx_pci_resume(struct device *dev_d) {
> struct pci_dev *pcidev = to_pci_dev(dev_d);
> - struct pcr_handle *handle;
> - struct rtsx_pcr *pcr;
> + struct pcr_handle *handle = pci_get_drvdata(pcidev);
> + struct rtsx_pcr *pcr = handle->pcr;
> int ret = 0;
>
> dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
>
> - handle = pci_get_drvdata(pcidev);
> - pcr = handle->pcr;
> -
> mutex_lock(&pcr->pcr_mutex);
>
> ret = rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, 0x00); @@
> -1711,13 +1703,11 @@ static int __maybe_unused rtsx_pci_resume(struct
> device *dev_d)
>
> static void rtsx_pci_shutdown(struct pci_dev *pcidev) {
> - struct pcr_handle *handle;
> - struct rtsx_pcr *pcr;
> + struct pcr_handle *handle = pci_get_drvdata(pcidev);
> + struct rtsx_pcr *pcr = handle->pcr;
>
> dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
>
> - handle = pci_get_drvdata(pcidev);
> - pcr = handle->pcr;
> rtsx_pci_power_off(pcr, HOST_ENTER_S1);
>
> pci_disable_device(pcidev);
> @@ -1756,11 +1746,8 @@ static int rtsx_pci_runtime_idle(struct device
> *device) static int rtsx_pci_runtime_suspend(struct device *device) {
> struct pci_dev *pcidev = to_pci_dev(device);
> - struct pcr_handle *handle;
> - struct rtsx_pcr *pcr;
> -
> - handle = pci_get_drvdata(pcidev);
> - pcr = handle->pcr;
> + struct pcr_handle *handle = pci_get_drvdata(pcidev);
> + struct rtsx_pcr *pcr = handle->pcr;
>
> dev_dbg(device, "--> %s\n", __func__);
>
> @@ -1786,9 +1773,6 @@ static int rtsx_pci_runtime_resume(struct device
> *device)
>
> rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, 0x00);
>
> - if (pcr->ops->fetch_vendor_settings)
> - pcr->ops->fetch_vendor_settings(pcr);
> -
> rtsx_pci_init_hw(pcr);
>
> if (pcr->slots[RTSX_SD_CARD].p_dev != NULL) {
> --
> 2.33.1

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