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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5E1D7CD3445 for ; Fri, 8 May 2026 15:34:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=1TzXyp+yIYJMwCrJFfkFZWc3eBpmjyTzay49h7tNZoA=; b=dvkRcGv72ckfgCTIum8PYlNJvE moQqgIUj/hf3LhZyrCtb3XqfaBAk97afRzshzk33EGPrH6Lh5fBJvC4d0L0fWI8g7oLDxNwMf0qhT 0q+9XOo7T8WxnM7Q0Obi0/o98U1aPVFKB8UDkrBfvsEZTaYQaa3U4Q+kaYF7cPb+rPQsUTLzTTd1M teCYDtJB2EUinTBAJHnoO6/3sTs4OkEH3xoi4vY1v2DtKyjdMtfV6QLRASmGcbczPsO7aSP+Cuyy4 QCKWt+0BMm9lJAw4pxV/Dl7yw3LXZJxFCQ+LTEa9w3TYalkXdKtj93UrnMXUKyFQcnKe+RjqYw/HO ZPNFV+qw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wLNDF-00000006rMw-2UIA; Fri, 08 May 2026 15:34:01 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wLNDB-00000006rHq-11kd for linux-arm-kernel@bombadil.infradead.org; Fri, 08 May 2026 15:33:57 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=1TzXyp+yIYJMwCrJFfkFZWc3eBpmjyTzay49h7tNZoA=; b=C7bbTGFqD0eKpoxw8dkA2AoYDn 5FHZzDTXXquFTpvf05DqTdp1Vn6poM2Es3Cu/Bs9c4es8w9PaIuAGua+QUOFSe/9RJ8dPmk7XtXHn hcPspCM3xaKbChlTsNZ384qx9Djpq7Izz1SGRoBr+Q5blJ4CScJ4QqAdrkuR3ZzLTEfs2F6vxeHsM 9zRGhy5le2nDOwxD0FzWTa238rziPpuX79YZjis6FVfv42rZOiUcuhFXfTdUPVqdYBUi7fGsln0NH 6fuJBBslxc9eYqebXfh12WlOcSHS0ckeRrsk1uV/1tRlatz/nXYmCfLQX/rz4UP2+0wh3vaB3Ocmf JPQcAw6w==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wLND8-00000006iLU-0HBQ for linux-arm-kernel@lists.infradead.org; Fri, 08 May 2026 15:33:56 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id B3AC935A2; Fri, 8 May 2026 08:33:47 -0700 (PDT) Received: from pluto.fritz.box (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 46A623F836; Fri, 8 May 2026 08:33:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1778254433; bh=FCP9MWDXBkmpmaTgWI8hodUMzwfIaYuwHBhh3J2kcKA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=We8gpuWMVkDmHnui9cmKinnAybqTZNAuKe+hyKXmEsKxKkZEsuPfoOdu5c0DU93NO WNTj7334SG2qs33M4ExZ26Oqu5x7SVvEJjCaDgH21wvTAQnK0HeEQdIauMrEfFf7S1 drGlI6jSs+Nfr0IQtbdqdRLaNOUVR8VCtfXTA/Ao= From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, arm-scmi@vger.kernel.org, linux-clk@vger.kernel.org, linux-renesas-soc@vger.kernel.org Cc: sudeep.holla@arm.com, philip.radford@arm.com, james.quinlan@broadcom.com, f.fainelli@gmail.com, vincent.guittot@linaro.org, etienne.carriere@foss.st.com, peng.fan@oss.nxp.com, michal.simek@amd.com, geert+renesas@glider.be, kuninori.morimoto.gx@renesas.com, marek.vasut+renesas@gmail.com, Cristian Marussi , Peng Fan Subject: [PATCH v4 08/15] firmware: arm_scmi: Harden clock parents discovery Date: Fri, 8 May 2026 16:32:53 +0100 Message-ID: <20260508153300.2224715-9-cristian.marussi@arm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260508153300.2224715-1-cristian.marussi@arm.com> References: <20260508153300.2224715-1-cristian.marussi@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260508_163354_648385_2A5F8D14 X-CRM114-Status: GOOD ( 11.91 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Fix clock parents enumeration to account only for effectively discovered parents during enumeration, avoiding to trust the total number of parents declared upfront by the platform. Reviewed-by: Peng Fan Signed-off-by: Cristian Marussi --- v2 --> v3 - collected Reviewed-by tags --- drivers/firmware/arm_scmi/clock.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c index c9b62edce4fd..d07cfef243fd 100644 --- a/drivers/firmware/arm_scmi/clock.c +++ b/drivers/firmware/arm_scmi/clock.c @@ -270,15 +270,15 @@ static int iter_clk_possible_parents_update_state(struct scmi_iterator_state *st * assume it's returned+remaining on first call. */ if (!st->max_resources) { - p->clkd->info.num_parents = st->num_returned + st->num_remaining; - p->clkd->info.parents = devm_kcalloc(p->dev, - p->clkd->info.num_parents, + int num_parents = st->num_returned + st->num_remaining; + + p->clkd->info.parents = devm_kcalloc(p->dev, num_parents, sizeof(*p->clkd->info.parents), GFP_KERNEL); - if (!p->clkd->info.parents) { - p->clkd->info.num_parents = 0; + if (!p->clkd->info.parents) return -ENOMEM; - } + + /* max_resources is used by the iterators to control bounds */ st->max_resources = st->num_returned + st->num_remaining; } @@ -293,9 +293,11 @@ static int iter_clk_possible_parents_process_response(const struct scmi_protocol const struct scmi_msg_resp_clock_possible_parents *r = response; struct scmi_clk_ipriv *p = priv; - u32 *parent = &p->clkd->info.parents[st->desc_index + st->loop_idx]; + p->clkd->info.parents[st->desc_index + st->loop_idx] = + le32_to_cpu(r->possible_parents[st->loop_idx]); - *parent = le32_to_cpu(r->possible_parents[st->loop_idx]); + /* Count only effectively discovered parents */ + p->clkd->info.num_parents++; return 0; } -- 2.53.0