From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 60FDFCCA487 for ; Mon, 13 Jun 2022 13:24:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376311AbiFMNYx (ORCPT ); Mon, 13 Jun 2022 09:24:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60884 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1359179AbiFMNWk (ORCPT ); Mon, 13 Jun 2022 09:22:40 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A41C56B082; Mon, 13 Jun 2022 04:23:42 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 48712B80E93; Mon, 13 Jun 2022 11:23:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9140BC34114; Mon, 13 Jun 2022 11:23:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1655119419; bh=7ZJdOB8NWztNFmJga+HULPqObVqV573O24/WNfw5IOk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f3+1NKqF9SzxoECOq/Pc+9WYVfp/Q3sLcUjQiDZra0TZAEh8iJSBjflgY2Aqafl1c a4NZqn/4hx83lO4GmQgey2EgZyZWWQkSqBGQ34oe5VzRx4P89zCiAiurcPD+8n8VB+ OpRf7A2EPASfrtsqlDYfOw/48PTv9V5LFftAAUpw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sergey Shtylyov , Damien Le Moal Subject: [PATCH 5.15 222/247] ata: libata-transport: fix {dma|pio|xfer}_mode sysfs files Date: Mon, 13 Jun 2022 12:12:04 +0200 Message-Id: <20220613094929.678779354@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220613094922.843438024@linuxfoundation.org> References: <20220613094922.843438024@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Sergey Shtylyov commit 72aad489f992871e908ff6d9055b26c6366fb864 upstream. The {dma|pio}_mode sysfs files are incorrectly documented as having a list of the supported DMA/PIO transfer modes, while the corresponding fields of the *struct* ata_device hold the transfer mode IDs, not masks. To match these docs, the {dma|pio}_mode (and even xfer_mode!) sysfs files are handled by the ata_bitfield_name_match() macro which leads to reading such kind of nonsense from them: $ cat /sys/class/ata_device/dev3.0/pio_mode XFER_UDMA_7, XFER_UDMA_6, XFER_UDMA_5, XFER_UDMA_4, XFER_MW_DMA_4, XFER_PIO_6, XFER_PIO_5, XFER_PIO_4, XFER_PIO_3, XFER_PIO_2, XFER_PIO_1, XFER_PIO_0 Using the correct ata_bitfield_name_search() macro fixes that: $ cat /sys/class/ata_device/dev3.0/pio_mode XFER_PIO_4 While fixing the file documentation, somewhat reword the {dma|pio}_mode file doc and add a note about being mostly useful for PATA devices to the xfer_mode file doc... Fixes: d9027470b886 ("[libata] Add ATA transport class") Signed-off-by: Sergey Shtylyov Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Signed-off-by: Greg Kroah-Hartman --- Documentation/ABI/testing/sysfs-ata | 11 ++++++----- drivers/ata/libata-transport.c | 2 +- 2 files changed, 7 insertions(+), 6 deletions(-) --- a/Documentation/ABI/testing/sysfs-ata +++ b/Documentation/ABI/testing/sysfs-ata @@ -107,13 +107,14 @@ Description: described in ATA8 7.16 and 7.17. Only valid if the device is not a PM. - pio_mode: (RO) Transfer modes supported by the device when - in PIO mode. Mostly used by PATA device. + pio_mode: (RO) PIO transfer mode used by the device. + Mostly used by PATA devices. - xfer_mode: (RO) Current transfer mode + xfer_mode: (RO) Current transfer mode. Mostly used by + PATA devices. - dma_mode: (RO) Transfer modes supported by the device when - in DMA mode. Mostly used by PATA device. + dma_mode: (RO) DMA transfer mode used by the device. + Mostly used by PATA devices. class: (RO) Device class. Can be "ata" for disk, "atapi" for packet device, "pmp" for PM, or --- a/drivers/ata/libata-transport.c +++ b/drivers/ata/libata-transport.c @@ -196,7 +196,7 @@ static struct { { XFER_PIO_0, "XFER_PIO_0" }, { XFER_PIO_SLOW, "XFER_PIO_SLOW" } }; -ata_bitfield_name_match(xfer,ata_xfer_names) +ata_bitfield_name_search(xfer, ata_xfer_names) /* * ATA Port attributes