From patchwork Wed Jan 19 15:36:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?5YiY5rC45b+X?= X-Patchwork-Id: 12717621 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 4AF32C433EF for ; Wed, 19 Jan 2022 15:39:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6417510E394; Wed, 19 Jan 2022 15:39:37 +0000 (UTC) X-Greylist: delayed 170676 seconds by postgrey-1.36 at gabe; Wed, 19 Jan 2022 15:39:35 UTC Received: from zg8tmtyylji0my4xnjqunzqa.icoremail.net (zg8tmtyylji0my4xnjqunzqa.icoremail.net [162.243.164.74]) by gabe.freedesktop.org (Postfix) with SMTP id 3035188830 for ; Wed, 19 Jan 2022 15:39:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=pku.edu.cn; s=dkim; h=Received:From:To:Cc:Subject:Date: Message-Id; bh=4QbeHj/mFxJ/v8fgqCZQeYHZiwI5/cy8jAzM9NG4I58=; b=d Nd/jNdsIacO8SRJmfAqrH6lbLiZZkSJsrcLG4CSzABDY7NK63PmcTEOIvJ/xe5Tp avqni9Xd1/71yMZbYKT4IR0aLNAkiT3IIryRCCNKfFNqpRsX8hOkTbW6wZ7SyrPP lF97qAd7DfljiMwru5b75dhPbLIzW9mWAcJjdT6ws4= Received: from localhost (unknown [10.129.21.144]) by front02 (Coremail) with SMTP id 54FpogCHjfXiL+hh9uF+AA--.10415S2; Wed, 19 Jan 2022 23:36:02 +0800 (CST) From: Yongzhi Liu To: a.hajda@samsung.com, narmstrong@baylibre.com, robert.foss@linaro.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, airlied@linux.ie, daniel@ffwll.ch Subject: [PATCH] drm/bridge: Add missing pm_runtime_put_sync Date: Wed, 19 Jan 2022 07:36:00 -0800 Message-Id: <1642606560-32287-1-git-send-email-lyz_cs@pku.edu.cn> X-Mailer: git-send-email 2.7.4 X-CM-TRANSID: 54FpogCHjfXiL+hh9uF+AA--.10415S2 X-Coremail-Antispam: 1UD129KBjvJXoW7tw4Utw48CF4DAr45GrWkCrg_yoW8CFWfpF 4Ig34YyrW0vFZ7Kw4xAr1DZryru3s3tFW8CrW2qwn7Zw1Yy3Wqqr43AFWaqFyFgFy5Ar1U Jr4ktFyfuFy0qr7anT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUU9F1xkIjI8I6I8E6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AE w4v_Jr0_Jr4l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2 IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr1UM28EF7xvwVC2 z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0DM2AIxVAIcxkEcV Aq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1j 6r18McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64 vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E8cxan2IY04v7MxkIecxE wVCm-wCF04k20xvY0x0EwIxGrwCF04k20xvE74AGY7Cv6cx26w4UJr1UMxC20s026xCaFV Cjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWl x4CE17CEb7AF67AKxVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r 1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwCI42IY6xAIw20EY4v20xvaj40_Jr0_ JF4lIxAIcVC2z280aVAFwI0_Gr0_Cr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcS sGvfC2KfnxnUUI43ZEXa7VUb0D73UUUUU== X-CM-SenderInfo: irzqijirqukmo6sn3hxhgxhubq/1tbiAwEKBlPy7uA+KwAssY X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Yongzhi Liu , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" pm_runtime_get_sync() will increase the rumtime PM counter even it returns an error. Thus a pairing decrement is needed to prevent refcount leak. Fix this by replacing this API with pm_runtime_resume_and_get(), which will not change the runtime PM counter on error. Besides, a matching decrement is needed on the error handling path to keep the counter balanced. Signed-off-by: Yongzhi Liu --- drivers/gpu/drm/bridge/nwl-dsi.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/bridge/nwl-dsi.c b/drivers/gpu/drm/bridge/nwl-dsi.c index 9282e61..e7dce5a 100644 --- a/drivers/gpu/drm/bridge/nwl-dsi.c +++ b/drivers/gpu/drm/bridge/nwl-dsi.c @@ -862,18 +862,19 @@ nwl_dsi_bridge_mode_set(struct drm_bridge *bridge, memcpy(&dsi->mode, adjusted_mode, sizeof(dsi->mode)); drm_mode_debug_printmodeline(adjusted_mode); - pm_runtime_get_sync(dev); + if (pm_runtime_resume_and_get(dev) < 0) + return; if (clk_prepare_enable(dsi->lcdif_clk) < 0) - return; + goto runtime_put; if (clk_prepare_enable(dsi->core_clk) < 0) - return; + goto runtime_put; /* Step 1 from DSI reset-out instructions */ ret = reset_control_deassert(dsi->rst_pclk); if (ret < 0) { DRM_DEV_ERROR(dev, "Failed to deassert PCLK: %d\n", ret); - return; + goto runtime_put; } /* Step 2 from DSI reset-out instructions */ @@ -883,13 +884,17 @@ nwl_dsi_bridge_mode_set(struct drm_bridge *bridge, ret = reset_control_deassert(dsi->rst_esc); if (ret < 0) { DRM_DEV_ERROR(dev, "Failed to deassert ESC: %d\n", ret); - return; + goto runtime_put; } ret = reset_control_deassert(dsi->rst_byte); if (ret < 0) { DRM_DEV_ERROR(dev, "Failed to deassert BYTE: %d\n", ret); - return; + goto runtime_put; } + +runtime_put: + pm_runtime_put_sync(dev); + return; } static void