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 C33973C1967; Thu, 15 Jan 2026 17:25:38 +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=1768497938; cv=none; b=vC8t1Bpu5SYQkrdiRepSop3O7yKym+WdY3sj47KgBZKvNCU8k7UY+EdWf9LRrGLz4PWtrIuGByGGfnej48b/MUUod4SbsFyPPosyHhQDWc7CH15BQ2sTRLWITQksmICVYY6cIzxq9Rk4DO/Nvn8BSbtQf/1nJoBawH580HyYLKI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768497938; c=relaxed/simple; bh=G6T1xrVBKMr2ZsAcOA6YZr8VkzAAKKF1rJojfOW/GPo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=nmZSaXkLacLQebG/dz8ePqXcPhB6/oyZdZQEXx5oM19FHspqo7/QSQH7l1lOmT148vQzLCUjhXn+ktg1XfvRMs5aUzp0d+obvb6ojfntI7mfO6mmvCzv59/Rz/+lo5ttySZCQjlxCmdufXnUVqseyBibCxVzy95bA9tL5iqPPdM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=n+b+t4cI; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="n+b+t4cI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4F8B0C19423; Thu, 15 Jan 2026 17:25:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1768497938; bh=G6T1xrVBKMr2ZsAcOA6YZr8VkzAAKKF1rJojfOW/GPo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=n+b+t4cISxmyEpxAWugkE0kH3arj0igQaWpKn7+qDyoT+Uy29DoG887FWiTAnvtDy qH4sIkjvShDhcfbP5QPJohgyVQNNeYJeqK+Jrbl8V9sDygtB5F7QOxXulusL8DjTQu 2QABh4gPak1x9aJBCKEsQvh7fcYCzZsfY9Z/Ati4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jinhui Guo , Corey Minyard , Sasha Levin Subject: [PATCH 5.15 257/554] ipmi: Fix __scan_channels() failing to rescan channels Date: Thu, 15 Jan 2026 17:45:23 +0100 Message-ID: <20260115164255.537154380@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260115164246.225995385@linuxfoundation.org> References: <20260115164246.225995385@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jinhui Guo [ Upstream commit 6bd30d8fc523fb880b4be548e8501bc0fe8f42d4 ] channel_handler() sets intf->channels_ready to true but never clears it, so __scan_channels() skips any rescan. When the BMC firmware changes a rescan is required. Allow it by clearing the flag before starting a new scan. Signed-off-by: Jinhui Guo Message-ID: <20250930074239.2353-3-guojinhui.liam@bytedance.com> Signed-off-by: Corey Minyard Signed-off-by: Sasha Levin --- drivers/char/ipmi/ipmi_msghandler.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c index 98ccba19292a..d680e4d46992 100644 --- a/drivers/char/ipmi/ipmi_msghandler.c +++ b/drivers/char/ipmi/ipmi_msghandler.c @@ -593,7 +593,8 @@ static void __ipmi_bmc_unregister(struct ipmi_smi *intf); static int __ipmi_bmc_register(struct ipmi_smi *intf, struct ipmi_device_id *id, bool guid_set, guid_t *guid, int intf_num); -static int __scan_channels(struct ipmi_smi *intf, struct ipmi_device_id *id); +static int __scan_channels(struct ipmi_smi *intf, + struct ipmi_device_id *id, bool rescan); /** @@ -2543,7 +2544,7 @@ static int __bmc_get_device_id(struct ipmi_smi *intf, struct bmc_device *bmc, if (__ipmi_bmc_register(intf, &id, guid_set, &guid, intf_num)) need_waiter(intf); /* Retry later on an error. */ else - __scan_channels(intf, &id); + __scan_channels(intf, &id, false); if (!intf_set) { @@ -2563,7 +2564,7 @@ static int __bmc_get_device_id(struct ipmi_smi *intf, struct bmc_device *bmc, goto out_noprocessing; } else if (memcmp(&bmc->fetch_id, &bmc->id, sizeof(bmc->id))) /* Version info changes, scan the channels again. */ - __scan_channels(intf, &bmc->fetch_id); + __scan_channels(intf, &bmc->fetch_id, true); bmc->dyn_id_expiry = jiffies + IPMI_DYN_DEV_ID_EXPIRY; @@ -3313,10 +3314,17 @@ channel_handler(struct ipmi_smi *intf, struct ipmi_recv_msg *msg) /* * Must be holding intf->bmc_reg_mutex to call this. */ -static int __scan_channels(struct ipmi_smi *intf, struct ipmi_device_id *id) +static int __scan_channels(struct ipmi_smi *intf, + struct ipmi_device_id *id, + bool rescan) { int rv; + if (rescan) { + /* Clear channels_ready to force channels rescan. */ + intf->channels_ready = false; + } + if (ipmi_version_major(id) > 1 || (ipmi_version_major(id) == 1 && ipmi_version_minor(id) >= 5)) { @@ -3488,7 +3496,7 @@ int ipmi_add_smi(struct module *owner, } mutex_lock(&intf->bmc_reg_mutex); - rv = __scan_channels(intf, &id); + rv = __scan_channels(intf, &id, false); mutex_unlock(&intf->bmc_reg_mutex); if (rv) goto out_err_bmc_reg; -- 2.51.0