Re: Bugfix thinkpad_acpi.c / proper fanquirk-matching for P50 series

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On Wed, Mar 27, 2019 at 12:32:50PM +0100, Matthias Hensler wrote:
> Hi Andy,
> as far as I see you are responsible for pushing bugfixes to the
> thinkpad_acpi-module. If not please point me in the correct direction,
> thanks a lot.

Thanks for the report and fix.

The best way to submit this is to use kernel source tree, where you can run

scripts/ -f drivers/platform/x86/thinkpad_acpi.c

to get people responsible for the driver in upstream, followed by

git format-patch ... (you need to commit your fix first)
git send-email...


For your convenience I Cc'ed this mail to all stakeholders, though it doesn't
abrogate the need to follow the process described above.

> Commit 846a416b4630fc960c10500b4194ad504bc22d4b changed the
> quirk-matching for modern thinkpads to use three characters instead of
> two. Unfortunately that commit did break the fan-quirk matching for my
> P50. With commit 599eefffcf6b9cff3e8cc2d96fd8eebfadab339c there were
> some cleanups in the quirk-macros, but still did not fix the wrong
> matching for the P50.
> Please find attached a patch to fix the quirk-macro to properly detect
> the second fan on the P50 (Modell N1Exxx). I guess there should be some
> additional definitions for the P70 and newer P-series, but I do not know
> the exact model-numbers unfortunately.
> Additional what I would also like to see, is a possibility to also
> control the second fan. I use a modified version of a patch that was
> posted some years ago to the mailinglist for that, but it is really
> ugly. If you want I can try to reimplement that in a cleaner way, but
> for now at least the wrong quirk-matching should be fixed. Thanks again.
> Regards,
> Matthias

> --- thinkpad_acpi.c	2019-03-27 12:26:11.977106074 +0100
> +++ thinkpad_acpi.c.fixed	2019-03-27 12:27:44.090340050 +0100
> @@ -8721,7 +8721,7 @@
>  	TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1),
>  	TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1),
> +	TPACPI_Q_LNV3('N', '1', 'E', TPACPI_FAN_2FAN),
>  };
>  static int __init fan_init(struct ibm_init_struct *iibm)

With Best Regards,
Andy Shevchenko

ibm-acpi-devel mailing list

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