From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 07E5A350851; Tue, 26 Aug 2025 14:43:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756219383; cv=none; b=d3oBxoTdnG4E+rajvbcUd5IAZPi2+nTRG+MzsYVIOyQKTwW1bmIv8Ems9u6cun4KDbKLmKZbHMKrtn4J0AJ2dhr4qqpp/K+DOlQjl0K52A2PFNheltR0DVeu5JMlA6zl1dWUEtggeKMRxIgTXG5eEY8Xub1s59WpCaD6sS/GqP8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756219383; c=relaxed/simple; bh=RT4AcSoq89dZNhuoeepHagYUoEmv2ptjIhzPtHkzekQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SSbHAeIKfdadQgGPPX9H4lHZgV5T+iQ3J8SS7/20L39n/6H52L7K23jEd12/YM4+91YEmci04rhQf/R2P31IX94EKjl4pygwuCSMfCfqX9Ju5hfhB9JCcsr9f/vpsHgmHDd5IQLNOS5Gms6V6QVzS/GuzJ3OilG80rXvHpeNzyc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=bH085c2e; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="bH085c2e" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8D23AC4CEF1; Tue, 26 Aug 2025 14:43:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756219382; bh=RT4AcSoq89dZNhuoeepHagYUoEmv2ptjIhzPtHkzekQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bH085c2eDaC+FAV01mFEZK6kxYPGwTcqkQZpa4JMoRI1Cy+36pNp82jRHS4sYOCsz d5GeOUlWU4PItnnIC/wvDXQjEhH7aM3vsTHN2Ymxu3QDkTm/e75dkN+f1XhT/LmbCq ef+H9gaaZa+S63FLcGSbFhRj/WcGpORpx1uamb1M= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Damien Le Moal , Hannes Reinecke , Niklas Cassel , Sasha Levin Subject: [PATCH 5.4 361/403] ata: Fix SATA_MOBILE_LPM_POLICY description in Kconfig Date: Tue, 26 Aug 2025 13:11:27 +0200 Message-ID: <20250826110916.975309498@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110905.607690791@linuxfoundation.org> References: <20250826110905.607690791@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Damien Le Moal [ Upstream commit ed62a62a18bc144f73eadf866ae46842e8f6606e ] Improve the description of the possible default SATA link power management policies and add the missing description for policy 5. No functional changes. Fixes: a5ec5a7bfd1f ("ata: ahci: Support state with min power but Partial low power state") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Reviewed-by: Niklas Cassel [ Adjust context ] Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/ata/Kconfig | 33 +++++++++++++++++++++++++-------- 1 file changed, 25 insertions(+), 8 deletions(-) --- a/drivers/ata/Kconfig +++ b/drivers/ata/Kconfig @@ -92,22 +92,39 @@ config SATA_AHCI config SATA_MOBILE_LPM_POLICY int "Default SATA Link Power Management policy for mobile chipsets" - range 0 4 + range 0 5 default 0 depends on SATA_AHCI help Select the Default SATA Link Power Management (LPM) policy to use for mobile / laptop variants of chipsets / "South Bridges". - The value set has the following meanings: + Each policy combines power saving states and features: + - Partial: The Phy logic is powered but is in a reduced power + state. The exit latency from this state is no longer than + 10us). + - Slumber: The Phy logic is powered but is in an even lower power + state. The exit latency from this state is potentially + longer, but no longer than 10ms. + - DevSleep: The Phy logic may be powered down. The exit latency from + this state is no longer than 20 ms, unless otherwise + specified by DETO in the device Identify Device Data log. + - HIPM: Host Initiated Power Management (host automatically + transitions to partial and slumber). + - DIPM: Device Initiated Power Management (device automatically + transitions to partial and slumber). + + The possible values for the default SATA link power management + policies are: 0 => Keep firmware settings - 1 => Maximum performance - 2 => Medium power - 3 => Medium power with Device Initiated PM enabled - 4 => Minimum power + 1 => No power savings (maximum performance) + 2 => HIPM (Partial) + 3 => HIPM (Partial) and DIPM (Partial and Slumber) + 4 => HIPM (Partial and DevSleep) and DIPM (Partial and Slumber) + 5 => HIPM (Slumber and DevSleep) and DIPM (Partial and Slumber) - Note "Minimum power" is known to cause issues, including disk - corruption, with some disks and should not be used. + Excluding the value 0, higher values represent policies with higher + power savings. config SATA_AHCI_PLATFORM tristate "Platform AHCI SATA support"