From patchwork Mon Apr 11 02:28:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Douglas Gilbert X-Patchwork-Id: 12808427 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 22BB4C433EF for ; Mon, 11 Apr 2022 02:30:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244381AbiDKCcr (ORCPT ); Sun, 10 Apr 2022 22:32:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57642 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244421AbiDKCcP (ORCPT ); Sun, 10 Apr 2022 22:32:15 -0400 Received: from smtp.infotech.no (smtp.infotech.no [82.134.31.41]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 5EEA26419 for ; Sun, 10 Apr 2022 19:29:21 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by smtp.infotech.no (Postfix) with ESMTP id 192222041E3; Mon, 11 Apr 2022 04:29:21 +0200 (CEST) X-Virus-Scanned: by amavisd-new-2.6.6 (20110518) (Debian) at infotech.no Received: from smtp.infotech.no ([127.0.0.1]) by localhost (smtp.infotech.no [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ceie9Y-sTy-R; Mon, 11 Apr 2022 04:29:19 +0200 (CEST) Received: from xtwo70.bingwo.ca (host-45-78-195-155.dyn.295.ca [45.78.195.155]) by smtp.infotech.no (Postfix) with ESMTPA id 089B02041B2; Mon, 11 Apr 2022 04:29:17 +0200 (CEST) From: Douglas Gilbert To: linux-scsi@vger.kernel.org Cc: martin.petersen@oracle.com, jejb@linux.vnet.ibm.com, hare@suse.de, bvanassche@acm.org Subject: [PATCH v24 32/46] sg: add some __must_hold macros Date: Sun, 10 Apr 2022 22:28:22 -0400 Message-Id: <20220411022836.11871-33-dgilbert@interlog.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220411022836.11871-1-dgilbert@interlog.com> References: <20220411022836.11871-1-dgilbert@interlog.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org In the case of sg_wait_open_event() which calls mutex_unlock on sdp->open_rel_lock and later calls mutex_lock on the same lock; this macro is needed to stop sparse complaining. In other cases it is a reminder to the coder (a precondition). Reviewed-by: Hannes Reinecke Signed-off-by: Douglas Gilbert --- drivers/scsi/sg.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 812767d50c31..2759dde361eb 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -374,6 +374,7 @@ sg_check_file_access(struct file *filp, const char *caller) static int sg_wait_open_event(struct sg_device *sdp, bool o_excl) + __must_hold(sdp->open_rel_lock) { int res = 0; @@ -1727,6 +1728,7 @@ sg_ctl_sg_io(struct file *filp, struct sg_device *sdp, struct sg_fd *sfp, */ static int sg_set_reserved_sz(struct sg_fd *sfp, int want_rsv_sz) + __must_hold(sfp->f_mutex) { int new_sz, blen, res; unsigned long iflags; @@ -3589,12 +3591,12 @@ sg_remove_sfp(struct kref *kref) static int sg_idr_max_id(int id, void *p, void *data) + __must_hold(sg_index_lock) { int *k = data; if (*k < id) *k = id; - return 0; } @@ -3897,6 +3899,7 @@ sg_proc_seq_show_devstrs(struct seq_file *s, void *v) /* Writes debug info for one sg_request in obp buffer */ static int sg_proc_debug_sreq(struct sg_request *srp, int to, char *obp, int len) + __must_hold(sfp->srp_arr.xa_lock) { bool is_v3v4, v4, is_dur; int n = 0; @@ -3999,6 +4002,7 @@ sg_proc_debug_fd(struct sg_fd *fp, char *obp, int len, unsigned long idx) /* Writes debug info for one sg device (including its sg fds) in obp buffer */ static int sg_proc_debug_sdev(struct sg_device *sdp, char *obp, int len, int *fd_counterp) + __must_hold(sg_index_lock) { int n = 0; int my_count = 0;