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 C38454431 for ; Wed, 15 Mar 2023 12:24:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 498DEC433D2; Wed, 15 Mar 2023 12:24:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678883066; bh=fofk8WbNwivuE0yeM3/KGpRswEl75MIfJGBz0O1B1Q8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BsFhCeolE1DpGhh8pGylmG0e34A5AyuIpAuVWeQxP5K99y3tOAglECztFzIZLnCYx 51n9+6hMKAU7sChsYPOhQSyjl9x+jUgQ5SrIYEqhR2S16CPMY2mVunF+ZWMabcIDBv WeOC6qTi8AnJjERj76WHaE6QySFx+B3f7PlEK6OA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Anton Lundin , Corey Minyard , Stable@vger.kernel.org Subject: [PATCH 5.10 078/104] ipmi:watchdog: Set panic count to proper value on a panic Date: Wed, 15 Mar 2023 13:12:49 +0100 Message-Id: <20230315115735.181500106@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230315115731.942692602@linuxfoundation.org> References: <20230315115731.942692602@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Corey Minyard commit db05ddf7f321634c5659a0cf7ea56594e22365f7 upstream. You will get two decrements when the messages on a panic are sent, not one, since commit 2033f6858970 ("ipmi: Free receive messages when in an oops") was added, but the watchdog code had a bug where it didn't set the value properly. Reported-by: Anton Lundin Cc: # v5.4+ Fixes: 2033f6858970 ("ipmi: Free receive messages when in an oops") Signed-off-by: Corey Minyard Signed-off-by: Greg Kroah-Hartman --- drivers/char/ipmi/ipmi_watchdog.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/drivers/char/ipmi/ipmi_watchdog.c +++ b/drivers/char/ipmi/ipmi_watchdog.c @@ -503,7 +503,7 @@ static void panic_halt_ipmi_heartbeat(vo msg.cmd = IPMI_WDOG_RESET_TIMER; msg.data = NULL; msg.data_len = 0; - atomic_inc(&panic_done_count); + atomic_add(2, &panic_done_count); rv = ipmi_request_supply_msgs(watchdog_user, (struct ipmi_addr *) &addr, 0, @@ -513,7 +513,7 @@ static void panic_halt_ipmi_heartbeat(vo &panic_halt_heartbeat_recv_msg, 1); if (rv) - atomic_dec(&panic_done_count); + atomic_sub(2, &panic_done_count); } static struct ipmi_smi_msg panic_halt_smi_msg = { @@ -537,12 +537,12 @@ static void panic_halt_ipmi_set_timeout( /* Wait for the messages to be free. */ while (atomic_read(&panic_done_count) != 0) ipmi_poll_interface(watchdog_user); - atomic_inc(&panic_done_count); + atomic_add(2, &panic_done_count); rv = __ipmi_set_timeout(&panic_halt_smi_msg, &panic_halt_recv_msg, &send_heartbeat_now); if (rv) { - atomic_dec(&panic_done_count); + atomic_sub(2, &panic_done_count); pr_warn("Unable to extend the watchdog timeout\n"); } else { if (send_heartbeat_now)