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[2610:10:20:722:a800:ff:fe36:1795]) by mx.google.com with ESMTPS id o9si18872158pgl.13.2021.03.01.13.41.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Mar 2021 13:41:57 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of dri-devel-bounces@lists.freedesktop.org designates 2610:10:20:722:a800:ff:fe36:1795 as permitted sender) client-ip=2610:10:20:722:a800:ff:fe36:1795; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@linaro.org header.s=google header.b=HNBZInMz; spf=pass (google.com: best guess record for domain of dri-devel-bounces@lists.freedesktop.org designates 2610:10:20:722:a800:ff:fe36:1795 as permitted sender) smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4F3486E0AB; Mon, 1 Mar 2021 21:41:56 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-lf1-x132.google.com (mail-lf1-x132.google.com [IPv6:2a00:1450:4864:20::132]) by gabe.freedesktop.org (Postfix) with ESMTPS id D4EC66E0AB for ; Mon, 1 Mar 2021 21:41:54 +0000 (UTC) Received: by mail-lf1-x132.google.com with SMTP id k9so8016097lfo.12 for ; Mon, 01 Mar 2021 13:41:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=y0nwR1AwY5pVQ0Nz4+ZuZuQPwcfLVnsZ3mxhVOAYPs4=; b=HNBZInMzcEaCJA5KlSiW+cWsrJhdPO/K+qNFUyDf3+MPRBgbG+/Qt+7+XRLNhfkgwh XGTUJUybeocqQ46oRrHvBvxTFFE/NRTW50bdplFT8faFHhKpCpwbUrtdvYK0xwuqYnEj 7UNi7bc3uB8QNX5QUta5AZRpdwfCd6h9j4u6kms0PLrXrRg7BH+rWJjUdGSxv2Vv3cup hEccxzasX/M0hcrIcVwiflf1tMaNA59cs01WdjIhSFtV0F8tSXQjlf29nQydcljlr6LP 1howDRoiRaCUiXWU0O9uvPpsOWaeBvXbEfVR3zJ4pWb1KxNTEhhINnqp2ObLBcwy+ou3 JEGQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=y0nwR1AwY5pVQ0Nz4+ZuZuQPwcfLVnsZ3mxhVOAYPs4=; b=Hre6bpdbS9hKlvCstiQL7nvu48HkcxGVvhDCYl3XuWFxrY/mL286beGJYaBKPG4fx1 4vOsKwZ1ZdaGFxrF2Ix9AqoqSFuf96I9jTyYlMVrRINddLUVfwN4ifsio1FHbLMo2IG5 isHnIBn4Y/UE0Y/n2fgC5Ru5NXdKedIR7GSy+gTaUSaJ5aO1/OFIWCL2wFBk8YZBhOKw kxprLkA8bZyjwwy9pxVgbVcd+VnzQS0huEAh5tLsQSxp0CtT1XwBdw6RqwIWQMPXSUAL PSIU8TG4T/O3bG/jNCLCvdeaYa8ddmYhvwU1Da+royELT3btrQzWQ918PEDsS5AIfmx8 L9Eg== X-Gm-Message-State: AOAM5338HLUSJFiMIRvFI9WlBZ49p6d7aCZ6vos/P/neAPYYAe3GRRjA JzUCUPTvB/44j87BSkYGJn0dnA== X-Received: by 2002:a05:6512:2356:: with SMTP id p22mr10073795lfu.3.1614634913192; Mon, 01 Mar 2021 13:41:53 -0800 (PST) Received: from umbar.lan ([37.153.55.125]) by smtp.gmail.com with ESMTPSA id 197sm167575ljf.70.2021.03.01.13.41.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Mar 2021 13:41:52 -0800 (PST) From: Dmitry Baryshkov To: Rob Clark , Sean Paul , Jonathan Marek Subject: [PATCH] gpu/drm/msm: fix shutdown hook in case GPU components failed to bind Date: Tue, 2 Mar 2021 00:41:52 +0300 Message-Id: <20210301214152.1805737-1-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.30.1 MIME-Version: 1.0 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: Stephen Boyd , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, David Airlie , freedreno@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" if GPU components have failed to bind, shutdown callback would fail with the following backtrace. Add safeguard check to stop that oops from happening and allow the board to reboot. [ 66.617046] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [ 66.626066] Mem abort info: [ 66.628939] ESR = 0x96000006 [ 66.632088] EC = 0x25: DABT (current EL), IL = 32 bits [ 66.637542] SET = 0, FnV = 0 [ 66.640688] EA = 0, S1PTW = 0 [ 66.643924] Data abort info: [ 66.646889] ISV = 0, ISS = 0x00000006 [ 66.650832] CM = 0, WnR = 0 [ 66.653890] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000107f81000 [ 66.660505] [0000000000000000] pgd=0000000100bb2003, p4d=0000000100bb2003, pud=0000000100897003, pmd=0000000000000000 [ 66.671398] Internal error: Oops: 96000006 [#1] PREEMPT SMP [ 66.677115] Modules linked in: [ 66.680261] CPU: 6 PID: 352 Comm: reboot Not tainted 5.11.0-rc2-00309-g79e3faa756b2 #38 [ 66.688473] Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT) [ 66.695347] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--) [ 66.701507] pc : msm_atomic_commit_tail+0x78/0x4e0 [ 66.706437] lr : commit_tail+0xa4/0x184 [ 66.710381] sp : ffff8000108f3af0 [ 66.713791] x29: ffff8000108f3af0 x28: ffff418c44337000 [ 66.719242] x27: 0000000000000000 x26: ffff418c40a24490 [ 66.724693] x25: ffffd3a842a4f1a0 x24: 0000000000000008 [ 66.730146] x23: ffffd3a84313f030 x22: ffff418c444ce000 [ 66.735598] x21: ffff418c408a4980 x20: 0000000000000000 [ 66.741049] x19: 0000000000000000 x18: ffff800010710fbc [ 66.746500] x17: 000000000000000c x16: 0000000000000001 [ 66.751954] x15: 0000000000010008 x14: 0000000000000068 [ 66.757405] x13: 0000000000000001 x12: 0000000000000000 [ 66.762855] x11: 0000000000000001 x10: 00000000000009b0 [ 66.768306] x9 : ffffd3a843192000 x8 : ffff418c44337000 [ 66.773757] x7 : 0000000000000000 x6 : 00000000a401b34e [ 66.779210] x5 : 00ffffffffffffff x4 : 0000000000000000 [ 66.784660] x3 : 0000000000000000 x2 : ffff418c444ce000 [ 66.790111] x1 : ffffd3a841dce530 x0 : ffff418c444cf000 [ 66.795563] Call trace: [ 66.798075] msm_atomic_commit_tail+0x78/0x4e0 [ 66.802633] commit_tail+0xa4/0x184 [ 66.806217] drm_atomic_helper_commit+0x160/0x390 [ 66.811051] drm_atomic_commit+0x4c/0x60 [ 66.815082] drm_atomic_helper_disable_all+0x1f4/0x210 [ 66.820355] drm_atomic_helper_shutdown+0x80/0x130 [ 66.825276] msm_pdev_shutdown+0x14/0x20 [ 66.829303] platform_shutdown+0x28/0x40 [ 66.833330] device_shutdown+0x158/0x330 [ 66.837357] kernel_restart+0x40/0xa0 [ 66.841122] __do_sys_reboot+0x228/0x250 [ 66.845148] __arm64_sys_reboot+0x28/0x34 [ 66.849264] el0_svc_common.constprop.0+0x74/0x190 [ 66.854187] do_el0_svc+0x24/0x90 [ 66.857595] el0_svc+0x14/0x20 [ 66.860739] el0_sync_handler+0x1a4/0x1b0 [ 66.864858] el0_sync+0x174/0x180 [ 66.868269] Code: 1ac020a0 2a000273 eb02007f 54ffff01 (f9400285) [ 66.874525] ---[ end trace 20dedb2a3229fec8 ]--- Fixes: 9d5cbf5fe46e ("drm/msm: add shutdown support for display platform_driver") Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/msm/msm_atomic.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) -- 2.30.1 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel Reviewed-by: Abhinav Kumar diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c index 6a326761dc4a..2fd0cf6421ad 100644 --- a/drivers/gpu/drm/msm/msm_atomic.c +++ b/drivers/gpu/drm/msm/msm_atomic.c @@ -207,7 +207,12 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state) struct msm_kms *kms = priv->kms; struct drm_crtc *async_crtc = NULL; unsigned crtc_mask = get_crtc_mask(state); - bool async = kms->funcs->vsync_time && + bool async; + + if (!kms) + return; + + async = kms->funcs->vsync_time && can_do_async(state, &async_crtc); trace_msm_atomic_commit_tail_start(async, crtc_mask);