linux-kernel - [PATCH] acpi: fan after suspend-to-mem fix

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Message-ID: <45E57A08.5060403@ray.fi>
Date:	Wed, 28 Feb 2007 14:48:08 +0200
From:	Tommi Kyntola <tommi.kyntola@....fi>
To:	linux-kernel@...r.kernel.org
CC:	acpi-devel@...ts.sourceforge.net
Subject: [PATCH] acpi: fan after suspend-to-mem fix


acpi_fan_suspend should probably set state to ACPI_D3, rather than ACPI_D0.
With this change the fan works after S3 suspend atleast on HP nw8000 laptop,
for which the suspended fan has been broken since sword-and-stone.

Signed-off-by: Tommi Kyntola <tommi.kyntola@....fi>
---
Why this was ACPI_D0 beats me, but it's been that way since
the _suspend/_resume functios got added in the commit
0feabb01d93e5801d1127416a66cfc3963280bca (2.6.18-rc1, I think).

The fan hasn't worked on my HP nw8000 laptop after an S3 suspend
ever, but fixing that to ACPI_D3 there finally makes it work as
expected.

If there was some hidden reason why that was set to ACPI_D0,
then perhaps a config option for some ICH4 or HP laptops
is called for.

         Kynde

diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index 045c894..7ae70b0 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -243,7 +243,7 @@ static int acpi_fan_suspend(struct acpi_device *device, int state)
         if (!device)
                 return -EINVAL;

-       acpi_bus_set_power(device->handle, ACPI_STATE_D0);
+       acpi_bus_set_power(device->handle, ACPI_STATE_D3);

         return AE_OK;
  }

-
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