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Thu, 07 Feb 2019 16:30:32 -0800 (PST) From: Kevin Hilman To: Maxime Jourdan , Neil Armstrong Subject: Re: [PATCH] soc: amlogic: canvas: Fix meson_canvas_get when probe failed In-Reply-To: References: <20190204094937.22763-1-narmstrong@baylibre.com> Date: Thu, 07 Feb 2019 16:30:31 -0800 Message-ID: <7h4l9fglzs.fsf@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190207_163035_007561_AA44C768 X-CRM114-Status: GOOD ( 13.27 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org Maxime Jourdan writes: > On Mon, Feb 4, 2019 at 10:49 AM Neil Armstrong wrote: >> >> When probe fails, a platforn_device is still associated to the node, >> but dev_get_drvdata() returns NULL. >> >> Handle this case by returning a consistent error. >> >> Fixes: d4983983d987 ("soc: amlogic: add meson-canvas driver") >> Signed-off-by: Neil Armstrong >> --- >> drivers/soc/amlogic/meson-canvas.c | 13 ++++++++++++- >> 1 file changed, 12 insertions(+), 1 deletion(-) >> >> This fix depends on "soc: amlogic: add missing of_node_put()" at [1] >> >> [1] https://patchwork.kernel.org/patch/10794545/ >> >> diff --git a/drivers/soc/amlogic/meson-canvas.c b/drivers/soc/amlogic/meson-canvas.c >> index 87a6c6e23591..151aa84bc593 100644 >> --- a/drivers/soc/amlogic/meson-canvas.c >> +++ b/drivers/soc/amlogic/meson-canvas.c >> @@ -51,6 +51,7 @@ struct meson_canvas *meson_canvas_get(struct device *dev) >> { >> struct device_node *canvas_node; >> struct platform_device *canvas_pdev; >> + struct meson_canvas *canvas; >> >> canvas_node = of_parse_phandle(dev->of_node, "amlogic,canvas", 0); >> if (!canvas_node) >> @@ -63,7 +64,17 @@ struct meson_canvas *meson_canvas_get(struct device *dev) >> } >> >> of_node_put(canvas_node); >> - return dev_get_drvdata(&canvas_pdev->dev); >> + >> + /* >> + * If priv is NULL, it's probably because the canvas hasn't >> + * properly initialized. Bait out with -EINVAL because, in the > > Bait -> Bail ? Fixed this up locally. [...] > Thanks for the patch, I missed the fact that a driver could have a > pdev yet with a failed probe. > > Reviewed-by: Maxime Jourdan Queud for v5.1 with Maxime's tag. (branch: v5.1/drivers) Kevin _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic 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 X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5AAB3C282CC for ; Fri, 8 Feb 2019 00:32:14 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 2869D2080D for ; 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Thu, 07 Feb 2019 16:30:33 -0800 (PST) Received: from localhost ([2601:602:9200:a1a5:1818:ce94:f47:7c12]) by smtp.googlemail.com with ESMTPSA id a13sm321291pgq.65.2019.02.07.16.30.32 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 07 Feb 2019 16:30:32 -0800 (PST) From: Kevin Hilman To: Maxime Jourdan , Neil Armstrong Subject: Re: [PATCH] soc: amlogic: canvas: Fix meson_canvas_get when probe failed In-Reply-To: References: <20190204094937.22763-1-narmstrong@baylibre.com> Date: Thu, 07 Feb 2019 16:30:31 -0800 Message-ID: <7h4l9fglzs.fsf@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190207_163035_822721_DC59A7B5 X-CRM114-Status: GOOD ( 14.85 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Maxime Jourdan writes: > On Mon, Feb 4, 2019 at 10:49 AM Neil Armstrong wrote: >> >> When probe fails, a platforn_device is still associated to the node, >> but dev_get_drvdata() returns NULL. >> >> Handle this case by returning a consistent error. >> >> Fixes: d4983983d987 ("soc: amlogic: add meson-canvas driver") >> Signed-off-by: Neil Armstrong >> --- >> drivers/soc/amlogic/meson-canvas.c | 13 ++++++++++++- >> 1 file changed, 12 insertions(+), 1 deletion(-) >> >> This fix depends on "soc: amlogic: add missing of_node_put()" at [1] >> >> [1] https://patchwork.kernel.org/patch/10794545/ >> >> diff --git a/drivers/soc/amlogic/meson-canvas.c b/drivers/soc/amlogic/meson-canvas.c >> index 87a6c6e23591..151aa84bc593 100644 >> --- a/drivers/soc/amlogic/meson-canvas.c >> +++ b/drivers/soc/amlogic/meson-canvas.c >> @@ -51,6 +51,7 @@ struct meson_canvas *meson_canvas_get(struct device *dev) >> { >> struct device_node *canvas_node; >> struct platform_device *canvas_pdev; >> + struct meson_canvas *canvas; >> >> canvas_node = of_parse_phandle(dev->of_node, "amlogic,canvas", 0); >> if (!canvas_node) >> @@ -63,7 +64,17 @@ struct meson_canvas *meson_canvas_get(struct device *dev) >> } >> >> of_node_put(canvas_node); >> - return dev_get_drvdata(&canvas_pdev->dev); >> + >> + /* >> + * If priv is NULL, it's probably because the canvas hasn't >> + * properly initialized. Bait out with -EINVAL because, in the > > Bait -> Bail ? Fixed this up locally. [...] > Thanks for the patch, I missed the fact that a driver could have a > pdev yet with a failed probe. > > Reviewed-by: Maxime Jourdan Queud for v5.1 with Maxime's tag. (branch: v5.1/drivers) Kevin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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 X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 43599C282C2 for ; Fri, 8 Feb 2019 00:30:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 09E2221916 for ; Fri, 8 Feb 2019 00:30:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=baylibre-com.20150623.gappssmtp.com header.i=@baylibre-com.20150623.gappssmtp.com header.b="wxLlntPq" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727132AbfBHAaf (ORCPT ); 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Thu, 07 Feb 2019 16:30:32 -0800 (PST) From: Kevin Hilman To: Maxime Jourdan , Neil Armstrong Cc: linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH] soc: amlogic: canvas: Fix meson_canvas_get when probe failed In-Reply-To: References: <20190204094937.22763-1-narmstrong@baylibre.com> Date: Thu, 07 Feb 2019 16:30:31 -0800 Message-ID: <7h4l9fglzs.fsf@baylibre.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Maxime Jourdan writes: > On Mon, Feb 4, 2019 at 10:49 AM Neil Armstrong wrote: >> >> When probe fails, a platforn_device is still associated to the node, >> but dev_get_drvdata() returns NULL. >> >> Handle this case by returning a consistent error. >> >> Fixes: d4983983d987 ("soc: amlogic: add meson-canvas driver") >> Signed-off-by: Neil Armstrong >> --- >> drivers/soc/amlogic/meson-canvas.c | 13 ++++++++++++- >> 1 file changed, 12 insertions(+), 1 deletion(-) >> >> This fix depends on "soc: amlogic: add missing of_node_put()" at [1] >> >> [1] https://patchwork.kernel.org/patch/10794545/ >> >> diff --git a/drivers/soc/amlogic/meson-canvas.c b/drivers/soc/amlogic/meson-canvas.c >> index 87a6c6e23591..151aa84bc593 100644 >> --- a/drivers/soc/amlogic/meson-canvas.c >> +++ b/drivers/soc/amlogic/meson-canvas.c >> @@ -51,6 +51,7 @@ struct meson_canvas *meson_canvas_get(struct device *dev) >> { >> struct device_node *canvas_node; >> struct platform_device *canvas_pdev; >> + struct meson_canvas *canvas; >> >> canvas_node = of_parse_phandle(dev->of_node, "amlogic,canvas", 0); >> if (!canvas_node) >> @@ -63,7 +64,17 @@ struct meson_canvas *meson_canvas_get(struct device *dev) >> } >> >> of_node_put(canvas_node); >> - return dev_get_drvdata(&canvas_pdev->dev); >> + >> + /* >> + * If priv is NULL, it's probably because the canvas hasn't >> + * properly initialized. Bait out with -EINVAL because, in the > > Bait -> Bail ? Fixed this up locally. [...] > Thanks for the patch, I missed the fact that a driver could have a > pdev yet with a failed probe. > > Reviewed-by: Maxime Jourdan Queud for v5.1 with Maxime's tag. (branch: v5.1/drivers) Kevin