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 X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 06A68C07E99 for ; Sat, 10 Jul 2021 02:19:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DEE98613F0 for ; Sat, 10 Jul 2021 02:19:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232725AbhGJCWB (ORCPT ); Fri, 9 Jul 2021 22:22:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:38204 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232222AbhGJCVY (ORCPT ); Fri, 9 Jul 2021 22:21:24 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id EBD65613C5; Sat, 10 Jul 2021 02:18:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625883519; bh=4ieD5I/jwigdT82yNm3SrszWs3hMrh9KrQQct20zQfE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Onw2Qg68HgVOJo2VNCF4DxU9vgWZH5aB0XK7CpYicPcuswU56ZelSnQGw9eU9UckZ LaTh7r7Uf5cga3vTw4BZYyiV/Jo2XAGdEbBLb+tjWWzloaDe3/F1PkrVVLJYNMaeei qn78SCTuUlv0kyhXazlyjaqbLUKWu5i71ngXRiRcwxprDF2l8VyK8NJw7AGHTgqu+a spm3uu50+E4NndzXpgQ0llEZ4yPVU7iJsBwuBJtfsbr1XGrRtYHxiiLSBXE2wH6yq9 Cd7X+DefXvo0bmVDyIL9E0Cr8jdTD0eSljnWqTFdFFUR03aaQSrQ3FZLcFZmBIp5iJ E6rzwj6Gog1pQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Hannes Reinecke , Bart Van Assche , "Martin K . Petersen" , Sasha Levin , linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 5.13 037/114] scsi: core: Fixup calling convention for scsi_mode_sense() Date: Fri, 9 Jul 2021 22:16:31 -0400 Message-Id: <20210710021748.3167666-37-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210710021748.3167666-1-sashal@kernel.org> References: <20210710021748.3167666-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Hannes Reinecke [ Upstream commit 8793613de913e03e7c884f4cc56e350bc716431e ] The description for scsi_mode_sense() claims to return the number of valid bytes on success, which is not what the code does. Additionally there is no gain in returning the SCSI status, as everything the callers do is to check against scsi_result_is_good(), which is what scsi_mode_sense() does already. So change the calling convention to return a standard error code on failure, and 0 on success, and adapt the description and all callers. Link: https://lore.kernel.org/r/20210427083046.31620-4-hare@suse.de Reviewed-by: Bart Van Assche Signed-off-by: Hannes Reinecke Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/scsi_lib.c | 10 ++++++---- drivers/scsi/scsi_transport_sas.c | 9 ++++----- drivers/scsi/sd.c | 12 ++++++------ drivers/scsi/sr.c | 2 +- 4 files changed, 17 insertions(+), 16 deletions(-) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 532304d42f00..8614f61e385d 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -2093,9 +2093,7 @@ EXPORT_SYMBOL_GPL(scsi_mode_select); * @sshdr: place to put sense data (or NULL if no sense to be collected). * must be SCSI_SENSE_BUFFERSIZE big. * - * Returns zero if unsuccessful, or the header offset (either 4 - * or 8 depending on whether a six or ten byte command was - * issued) if successful. + * Returns zero if successful, or a negative error number on failure */ int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, @@ -2142,6 +2140,8 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, result = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buffer, len, sshdr, timeout, retries, NULL); + if (result < 0) + return result; /* This code looks awful: what it's doing is making sure an * ILLEGAL REQUEST sense return identifies the actual command @@ -2186,13 +2186,15 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, data->block_descriptor_length = buffer[3]; } data->header_length = header_length; + result = 0; } else if ((status_byte(result) == CHECK_CONDITION) && scsi_sense_valid(sshdr) && sshdr->sense_key == UNIT_ATTENTION && retry_count) { retry_count--; goto retry; } - + if (result > 0) + result = -EIO; return result; } EXPORT_SYMBOL(scsi_mode_sense); diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c index c9abed8429c9..4a96fb05731d 100644 --- a/drivers/scsi/scsi_transport_sas.c +++ b/drivers/scsi/scsi_transport_sas.c @@ -1229,16 +1229,15 @@ int sas_read_port_mode_page(struct scsi_device *sdev) char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata; struct sas_end_device *rdev = sas_sdev_to_rdev(sdev); struct scsi_mode_data mode_data; - int res, error; + int error; if (!buffer) return -ENOMEM; - res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3, - &mode_data, NULL); + error = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3, + &mode_data, NULL); - error = -EINVAL; - if (!scsi_status_is_good(res)) + if (error) goto out; msdata = buffer + mode_data.header_length + diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index a2c3d9ad9ee4..4df54d4b3c65 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -2684,18 +2684,18 @@ sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) * 5: Illegal Request, Sense Code 24: Invalid field in * CDB. */ - if (!scsi_status_is_good(res)) + if (res < 0) res = sd_do_mode_sense(sdkp, 0, 0, buffer, 4, &data, NULL); /* * Third attempt: ask 255 bytes, as we did earlier. */ - if (!scsi_status_is_good(res)) + if (res < 0) res = sd_do_mode_sense(sdkp, 0, 0x3F, buffer, 255, &data, NULL); } - if (!scsi_status_is_good(res)) { + if (res < 0) { sd_first_printk(KERN_WARNING, sdkp, "Test WP failed, assume Write Enabled\n"); } else { @@ -2756,7 +2756,7 @@ sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, first_len, &data, &sshdr); - if (!scsi_status_is_good(res)) + if (res < 0) goto bad_sense; if (!data.header_length) { @@ -2788,7 +2788,7 @@ sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) res = sd_do_mode_sense(sdkp, dbd, modepage, buffer, len, &data, &sshdr); - if (scsi_status_is_good(res)) { + if (!res) { int offset = data.header_length + data.block_descriptor_length; while (offset < len) { @@ -2906,7 +2906,7 @@ static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT, sdkp->max_retries, &data, &sshdr); - if (!scsi_status_is_good(res) || !data.header_length || + if (res < 0 || !data.header_length || data.length < 6) { sd_first_printk(KERN_WARNING, sdkp, "getting Control mode page failed, assume no ATO\n"); diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c index 7815ed642d43..1a94c7b1de2d 100644 --- a/drivers/scsi/sr.c +++ b/drivers/scsi/sr.c @@ -913,7 +913,7 @@ static void get_capabilities(struct scsi_cd *cd) rc = scsi_mode_sense(cd->device, 0, 0x2a, buffer, ms_len, SR_TIMEOUT, 3, &data, NULL); - if (!scsi_status_is_good(rc) || data.length > ms_len || + if (rc < 0 || data.length > ms_len || data.header_length + data.block_descriptor_length > data.length) { /* failed, drive doesn't have capabilities mode page */ cd->cdi.speed = 1; -- 2.30.2