From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751717AbdJBUaE (ORCPT ); Mon, 2 Oct 2017 16:30:04 -0400 Received: from hqemgate14.nvidia.com ([216.228.121.143]:2287 "EHLO hqemgate14.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751132AbdJBUaC (ORCPT ); Mon, 2 Oct 2017 16:30:02 -0400 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Mon, 02 Oct 2017 13:29:31 -0700 Subject: Re: [PATCH 4/4] soc/tegra: bpmp: check BPMP response return code To: Timo Alho , CC: , References: <8be4357544ffb9a60e116bc0a666189b93951c91.1504776489.git.talho@nvidia.com> From: Jon Hunter Message-ID: Date: Mon, 2 Oct 2017 21:26:12 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <8be4357544ffb9a60e116bc0a666189b93951c91.1504776489.git.talho@nvidia.com> X-Originating-IP: [10.26.11.81] X-ClientProxiedBy: UKMAIL102.nvidia.com (10.26.138.15) To UKMAIL101.nvidia.com (10.26.138.13) Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/09/17 10:31, Timo Alho wrote: > Add checks for return code in BPMP response message. > > Signed-off-by: Timo Alho > --- > drivers/soc/tegra/powergate-bpmp.c | 15 +++++++++++++-- > 1 file changed, 13 insertions(+), 2 deletions(-) > > diff --git a/drivers/soc/tegra/powergate-bpmp.c b/drivers/soc/tegra/powergate-bpmp.c > index 8fc3560..82c7e27 100644 > --- a/drivers/soc/tegra/powergate-bpmp.c > +++ b/drivers/soc/tegra/powergate-bpmp.c > @@ -42,6 +42,7 @@ static int tegra_bpmp_powergate_set_state(struct tegra_bpmp *bpmp, > { > struct mrq_pg_request request; > struct tegra_bpmp_message msg; > + int err; > > memset(&request, 0, sizeof(request)); > request.cmd = CMD_PG_SET_STATE; > @@ -53,7 +54,13 @@ static int tegra_bpmp_powergate_set_state(struct tegra_bpmp *bpmp, > msg.tx.data = &request; > msg.tx.size = sizeof(request); > > - return tegra_bpmp_transfer(bpmp, &msg); > + err = tegra_bpmp_transfer(bpmp, &msg); > + if (err < 0) > + return err; > + else if (msg.rx.ret < 0) > + return -EINVAL; > + > + return 0; > } > > static int tegra_bpmp_powergate_get_state(struct tegra_bpmp *bpmp, > @@ -80,6 +87,8 @@ static int tegra_bpmp_powergate_get_state(struct tegra_bpmp *bpmp, > err = tegra_bpmp_transfer(bpmp, &msg); > if (err < 0) > return PG_STATE_OFF; > + else if (msg.rx.ret < 0) > + return -EINVAL; > > return response.get_state.state; > } > @@ -106,6 +115,8 @@ static int tegra_bpmp_powergate_get_max_id(struct tegra_bpmp *bpmp) > err = tegra_bpmp_transfer(bpmp, &msg); > if (err < 0) > return err; > + else if (msg.rx.ret < 0) > + return -EINVAL; > > return response.get_max_id.max_id; > } > @@ -132,7 +143,7 @@ static char *tegra_bpmp_powergate_get_name(struct tegra_bpmp *bpmp, > msg.rx.size = sizeof(response); > > err = tegra_bpmp_transfer(bpmp, &msg); > - if (err < 0) > + if (err < 0 || msg.rx.ret < 0) > return NULL; > > return kstrdup(response.get_name.name, GFP_KERNEL); Acked-by: Jon Hunter Cheers Jon -- nvpublic