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 9E37B1891A9; Mon, 14 Jul 2025 00:57:14 +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=1752454634; cv=none; b=ulJFM+sQj6yBG2Z7yvHJIQNbBCDze2mHfstJTFF/O9UaEqVXVuZu8ZU2frIZKOGpwuNu8vqkh73l/XFSeaA0YXflAds89kn/jIJilA46mzlxOQrzB7IYMnaXH4O3szfwlPb1HER7P0pe/GPPQ5o3ZvolgtGH7f0rnS1J2YBhXqc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752454634; c=relaxed/simple; bh=7qwvXDduW+5S26morZnMCUX461kUh7KosRJqVyRGacQ=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XrNDIQ6iRum1+PBIlXM9LPsWYgpoCglqhlmFiQgZlt/v3HYpKMFT4ZkIH2WzJylX17eDmQJ0YZzGsimW26aNEL3bu9nltQY1PjHL9bseuVjKiwn0ZC6X3mu9MUckNWW0ZR6N6ZPtJxWLpvri0SdyijvbWXtqXB/VaNAV7EcRee0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rB5n73w5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="rB5n73w5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A424DC4CEE3; Mon, 14 Jul 2025 00:57:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1752454634; bh=7qwvXDduW+5S26morZnMCUX461kUh7KosRJqVyRGacQ=; h=From:To:Subject:Date:In-Reply-To:References:From; b=rB5n73w5jr3Hj/gO+glroCoEKhU1Lp6HOeafK4njPfHw0cmHXMsvxWsBwLQ3q6LCv Ba8YCb8xuthZ0zIU0hfYudwBPu02KwDoqUZfaPhACx1zrhKSz1+4maGrdYaiyItvvI TwHK5o96ehFvBtZTSmXEdiqkDy2nZ4hsDMBy32GUuFfmEuk/11T0t1r0eMMwRP/Q3H Msid+uYOkh6/jn62KMjOvx9cCyfM+4I7A4YBG2QeZn4+eXNpQwQW9zz2b7BR2K4PnK 7KmCBmvVhNjPdjBH81SwVM6ByNyRo0gSsjs9MeHyWpMFC/sPMG3Zz1mq1lwiO79z/o 9tGGIA25TBJZw== From: Damien Le Moal To: linux-ide@vger.kernel.org, Niklas Cassel , linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Jason Yan Subject: [PATCH v4 1/3] ata: libata-eh: Remove ata_do_eh() Date: Mon, 14 Jul 2025 09:54:52 +0900 Message-ID: <20250714005454.35802-2-dlemoal@kernel.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250714005454.35802-1-dlemoal@kernel.org> References: <20250714005454.35802-1-dlemoal@kernel.org> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The only reason for ata_do_eh() to exist is that the two caller sites, ata_std_error_handler() and ata_sff_error_handler() may pass it a NULL hardreset operation so that the built-in (generic) hardreset operation for a driver is ignored if the adapter SCR access is not available. However, ata_std_error_handler() and ata_sff_error_handler() modifications of the hardreset port operation can easily be combined as they are mutually exclusive. That is, a driver using sata_std_hardreset() as its hardreset operation cannot use sata_sff_hardreset() and vice-versa. With this observation, ata_do_eh() can be removed and its code moved to ata_std_error_handler(). The condition used to ignore the built-in hardreset port operation is modified to be the one that was used in ata_sff_error_handler(). This requires defining a stub for the function sata_sff_hardreset() to avoid compilation errors when CONFIG_ATA_SFF is not enabled. Furthermore, instead of modifying the local hardreset operation definition, set the ATA_LFLAG_NO_HRST link flag to prevent the use of built-in hardreset methods for ports without a valid scr_read function. This flag is checked in ata_eh_reset() and if set, the hardreset method is ignored. This change simplifies ata_sff_error_handler() as this function now only needs to call ata_std_error_handler(). No functional changes. Signed-off-by: Damien Le Moal --- drivers/ata/libata-eh.c | 48 ++++++++++++---------------------------- drivers/ata/libata-sff.c | 10 +-------- include/linux/libata.h | 9 +++++--- 3 files changed, 21 insertions(+), 46 deletions(-) diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 436536112043..30c831e56a7f 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -4067,59 +4067,39 @@ void ata_eh_finish(struct ata_port *ap) } /** - * ata_do_eh - do standard error handling + * ata_std_error_handler - standard error handler * @ap: host port to handle error for * - * @prereset: prereset method (can be NULL) - * @softreset: softreset method (can be NULL) - * @hardreset: hardreset method (can be NULL) - * @postreset: postreset method (can be NULL) - * * Perform standard error handling sequence. * * LOCKING: * Kernel thread context (may sleep). */ -void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, - ata_reset_fn_t softreset, ata_reset_fn_t hardreset, - ata_postreset_fn_t postreset) +void ata_std_error_handler(struct ata_port *ap) { - struct ata_device *dev; + struct ata_port_operations *ops = ap->ops; + struct ata_link *link = &ap->link; int rc; + /* Ignore built-in hardresets if SCR access is not available */ + if ((ops->hardreset == sata_std_hardreset || + ops->hardreset == sata_sff_hardreset) && !sata_scr_valid(link)) + link->flags |= ATA_LFLAG_NO_HRST; + ata_eh_autopsy(ap); ata_eh_report(ap); - rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset, - NULL); + rc = ata_eh_recover(ap, ops->prereset, ops->softreset, + ops->hardreset, ops->postreset, NULL); if (rc) { - ata_for_each_dev(dev, &ap->link, ALL) + struct ata_device *dev; + + ata_for_each_dev(dev, link, ALL) ata_dev_disable(dev); } ata_eh_finish(ap); } - -/** - * ata_std_error_handler - standard error handler - * @ap: host port to handle error for - * - * Standard error handler - * - * LOCKING: - * Kernel thread context (may sleep). - */ -void ata_std_error_handler(struct ata_port *ap) -{ - struct ata_port_operations *ops = ap->ops; - ata_reset_fn_t hardreset = ops->hardreset; - - /* ignore built-in hardreset if SCR access is not available */ - if (hardreset == sata_std_hardreset && !sata_scr_valid(&ap->link)) - hardreset = NULL; - - ata_do_eh(ap, ops->prereset, ops->softreset, hardreset, ops->postreset); -} EXPORT_SYMBOL_GPL(ata_std_error_handler); #ifdef CONFIG_PM diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c index 5a46c066abc3..e61f00779e40 100644 --- a/drivers/ata/libata-sff.c +++ b/drivers/ata/libata-sff.c @@ -2054,8 +2054,6 @@ EXPORT_SYMBOL_GPL(ata_sff_drain_fifo); */ void ata_sff_error_handler(struct ata_port *ap) { - ata_reset_fn_t softreset = ap->ops->softreset; - ata_reset_fn_t hardreset = ap->ops->hardreset; struct ata_queued_cmd *qc; unsigned long flags; @@ -2077,13 +2075,7 @@ void ata_sff_error_handler(struct ata_port *ap) spin_unlock_irqrestore(ap->lock, flags); - /* ignore built-in hardresets if SCR access is not available */ - if ((hardreset == sata_std_hardreset || - hardreset == sata_sff_hardreset) && !sata_scr_valid(&ap->link)) - hardreset = NULL; - - ata_do_eh(ap, ap->ops->prereset, softreset, hardreset, - ap->ops->postreset); + ata_std_error_handler(ap); } EXPORT_SYMBOL_GPL(ata_sff_error_handler); diff --git a/include/linux/libata.h b/include/linux/libata.h index d092747be588..cf0b3fff3198 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -1412,9 +1412,6 @@ extern void ata_eh_thaw_port(struct ata_port *ap); extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); -extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, - ata_reset_fn_t softreset, ata_reset_fn_t hardreset, - ata_postreset_fn_t postreset); extern void ata_std_error_handler(struct ata_port *ap); extern void ata_std_sched_eh(struct ata_port *ap); extern void ata_std_end_eh(struct ata_port *ap); @@ -2152,6 +2149,12 @@ static inline u8 ata_wait_idle(struct ata_port *ap) return status; } +#else /* CONFIG_ATA_SFF */ +static inline int sata_sff_hardreset(struct ata_link *link, unsigned int *class, + unsigned long deadline) +{ + return -EOPNOTSUPP; +} #endif /* CONFIG_ATA_SFF */ #endif /* __LINUX_LIBATA_H__ */ -- 2.50.1