From patchwork Tue Apr 26 06:02:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinod Polimera X-Patchwork-Id: 566297 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 53E22C433F5 for ; Tue, 26 Apr 2022 06:02:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241938AbiDZGFi (ORCPT ); Tue, 26 Apr 2022 02:05:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46812 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235519AbiDZGFh (ORCPT ); Tue, 26 Apr 2022 02:05:37 -0400 Received: from alexa-out.qualcomm.com (alexa-out.qualcomm.com [129.46.98.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DFF6876295; Mon, 25 Apr 2022 23:02:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1650952951; x=1682488951; h=from:to:cc:subject:date:message-id; bh=amARuMpJBWtf7g90334aANQiHnLqYqTFsIkho2bxSdw=; b=lgtg5CPrApKwxqMXF37qbcewbUbMq+OJtzGEVH4kU3n4VeHWANqOfs7M Ei0ly4HbEldb2DV3hhwBtdQXScLdKU0VotCvI5HhHxQIwLyK5t3YKXCce Ecw3hgMj5BkaAc8Pi7ooDzY9P+Uqc0mTTEzhXsislQqLhkIJIa5s6S0NS M=; Received: from ironmsg-lv-alpha.qualcomm.com ([10.47.202.13]) by alexa-out.qualcomm.com with ESMTP; 25 Apr 2022 23:02:30 -0700 X-QCInternal: smtphost Received: from ironmsg01-blr.qualcomm.com ([10.86.208.130]) by ironmsg-lv-alpha.qualcomm.com with ESMTP/TLS/AES256-SHA; 25 Apr 2022 23:02:27 -0700 X-QCInternal: smtphost Received: from vpolimer-linux.qualcomm.com ([10.204.67.235]) by ironmsg01-blr.qualcomm.com with ESMTP; 26 Apr 2022 11:32:14 +0530 Received: by vpolimer-linux.qualcomm.com (Postfix, from userid 463814) id 91B9D55F7; Tue, 26 Apr 2022 11:32:13 +0530 (IST) From: Vinod Polimera To: dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, devicetree@vger.kernel.org Cc: Vinod Polimera , linux-kernel@vger.kernel.org, robdclark@gmail.com, dmitry.baryshkov@linaro.org, dianders@chromium.org, quic_kalyant@quicinc.com Subject: [PATCH] drm/msm/disp/dpu1: avoid clearing hw interrupts if hw_intr is null during drm uninit Date: Tue, 26 Apr 2022 11:32:11 +0530 Message-Id: <1650952931-31988-1-git-send-email-quic_vpolimer@quicinc.com> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Avoid clearing irqs and derefernce hw_intr when hw_intr is null. BUG: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Call trace: dpu_core_irq_uninstall+0x50/0xb0 dpu_irq_uninstall+0x18/0x24 msm_drm_uninit+0xd8/0x16c msm_drm_bind+0x580/0x5fc try_to_bring_up_master+0x168/0x1c0 __component_add+0xb4/0x178 component_add+0x1c/0x28 dp_display_probe+0x38c/0x400 platform_probe+0xb0/0xd0 really_probe+0xcc/0x2c8 __driver_probe_device+0xbc/0xe8 driver_probe_device+0x48/0xf0 __device_attach_driver+0xa0/0xc8 bus_for_each_drv+0x8c/0xd8 __device_attach+0xc4/0x150 device_initial_probe+0x1c/0x28 Fixes: a73033619ea ("drm/msm/dpu: squash dpu_core_irq into dpu_hw_interrupts") Signed-off-by: Vinod Polimera --- drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c index c515b7c..ab28577 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c @@ -599,6 +599,9 @@ void dpu_core_irq_uninstall(struct dpu_kms *dpu_kms) { int i; + if (!dpu_kms->hw_intr) + return; + pm_runtime_get_sync(&dpu_kms->pdev->dev); for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++) if (!list_empty(&dpu_kms->hw_intr->irq_cb_tbl[i]))