linux-kernel - Re: [PATCH v2 1/3] platform/x86: intel_scu

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Message-ID: <20241021084940.GA275077@black.fi.intel.com>
Date: Mon, 21 Oct 2024 11:49:40 +0300
From: Mika Westerberg <mika.westerberg@...ux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
	Andy Shevchenko <andy@...nel.org>,
	Hans de Goede <hdegoede@...hat.com>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Ferry Toth <fntoth@...il.com>
Subject: Re: [PATCH v2 1/3] platform/x86: intel_scu_ipc: Replace workaround
 by 32-bit IO

On Mon, Oct 21, 2024 at 11:38:51AM +0300, Andy Shevchenko wrote:
> The theory is that the so called workaround in pwr_reg_rdwr() is
> the actual reader of the data in 32-bit chunks. For some reason
> the 8-bit IO won't fail after that. Replace the workaround by using
> 32-bit IO explicitly and then memcpy() as much data as was requested
> by the user. The same approach is already in use in
> intel_scu_ipc_dev_command_with_size().
> 
> Tested-by: Ferry Toth <fntoth@...il.com>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Acked-by: Mika Westerberg <mika.westerberg@...ux.intel.com>