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Groups > linux.kernel > #1418023
| From | Sinan Kaya <okaya@codeaurora.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH V6 5/8] vfio: platform: call _RST method when using ACPI |
| Date | 2016-06-09 04:40 +0200 |
| Message-ID | <rHY30-7L-9@gated-at.bofh.it> (permalink) |
| References | <rDUAF-67E-5@gated-at.bofh.it> <rDUAF-67E-23@gated-at.bofh.it> <rHUiK-6a7-35@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 6/8/2016 6:31 PM, Rafael J. Wysocki wrote: > On Sun, May 29, 2016 at 12:01 AM, Sinan Kaya <okaya@codeaurora.org> wrote: >> The device tree code checks for the presence of a reset driver and calls >> the of_reset function pointer by looking up the reset driver as a module. >> >> ACPI defines _RST method to perform device level reset. After the _RST >> method is executed, the OS can resume using the device. _RST method is >> expected to stop DMA transfers and IRQs. >> >> This patch checks the presence of _RST method and calls the _RST >> method when reset is requested. > > You could check if _RST is present at probe time and store the ACPI > handle of it instead of the HID pointer. > > This way you wouldn't need to repeat that check every time reset is used. > Makes sense. I'll give it a shot. -- Sinan Kaya Qualcomm Technologies, Inc. on behalf of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project
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Re: [PATCH V6 5/8] vfio: platform: call _RST method when using ACPI "Rafael J. Wysocki" <rafael@kernel.org> - 2016-06-09 00:40 +0200 Re: [PATCH V6 5/8] vfio: platform: call _RST method when using ACPI Sinan Kaya <okaya@codeaurora.org> - 2016-06-09 04:40 +0200
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