From: Fabio Estevam <festevam@gmail.com> To: robdclark@gmail.com Cc: sean@poorly.run, airlied@linux.ie, mkrishn@codeaurora.org, dri-devel@lists.freedesktop.org, bjorn.andersson@linaro.org, jcrouse@codeaurora.org, kernel@pengutronix.de, daniel@ffwll.ch, jonathan@marek.ca, kalyan_t@codeaurora.org, Fabio Estevam <festevam@gmail.com>, stable@vger.kernel.org Subject: [PATCH v2 1/2] drm/msm: Call shutdown conditionally Date: Tue, 19 Jan 2021 20:10:54 -0300 [thread overview] Message-ID: <20210119231055.2497880-1-festevam@gmail.com> (raw) Issuing a 'reboot' command in i.MX5 leads to the following flow: [ 24.557742] [<c0769b78>] (msm_atomic_commit_tail) from [<c06db0b4>] (commit_tail+0xa4/0x1b0) [ 24.566349] [<c06db0b4>] (commit_tail) from [<c06dbed0>] (drm_atomic_helper_commit+0x154/0x188) [ 24.575193] [<c06dbed0>] (drm_atomic_helper_commit) from [<c06db604>] (drm_atomic_helper_disable_all+0x154/0x1c0) [ 24.585599] [<c06db604>] (drm_atomic_helper_disable_all) from [<c06db704>] (drm_atomic_helper_shutdown+0x94/0x12c) [ 24.596094] [<c06db704>] (drm_atomic_helper_shutdown) from In the i.MX5 case, priv->kms is not populated (as i.MX5 does not use any of the Qualcomm display controllers), causing a NULL pointer dereference in msm_atomic_commit_tail(): [ 24.268964] 8<--- cut here --- [ 24.274602] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 24.283434] pgd = (ptrval) [ 24.286387] [00000000] *pgd=ca212831 [ 24.290788] Internal error: Oops: 17 [#1] SMP ARM [ 24.295609] Modules linked in: [ 24.298777] CPU: 0 PID: 197 Comm: init Not tainted 5.11.0-rc2-next-20210111 #333 [ 24.306276] Hardware name: Freescale i.MX53 (Device Tree Support) [ 24.312442] PC is at msm_atomic_commit_tail+0x54/0xb9c [ 24.317743] LR is at commit_tail+0xa4/0x1b0 Fix the problem by calling drm_atomic_helper_shutdown() conditionally. Cc: <stable@vger.kernel.org> Fixes: 9d5cbf5fe46e ("drm/msm: add shutdown support for display platform_driver") Suggested-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Fabio Estevam <festevam@gmail.com> --- Changes since v1: - Explain in the commit log that the problem happens after a 'reboot' command. drivers/gpu/drm/msm/msm_drv.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index 108c405e03dd..c082b72b9e3b 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -1311,7 +1311,8 @@ static void msm_pdev_shutdown(struct platform_device *pdev) { struct drm_device *drm = platform_get_drvdata(pdev); - drm_atomic_helper_shutdown(drm); + if (get_mdp_ver(pdev)) + drm_atomic_helper_shutdown(drm); } static const struct of_device_id dt_match[] = { -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Fabio Estevam <festevam@gmail.com> To: robdclark@gmail.com Cc: mkrishn@codeaurora.org, jonathan@marek.ca, airlied@linux.ie, dri-devel@lists.freedesktop.org, bjorn.andersson@linaro.org, stable@vger.kernel.org, kernel@pengutronix.de, kalyan_t@codeaurora.org, sean@poorly.run Subject: [PATCH v2 1/2] drm/msm: Call shutdown conditionally Date: Tue, 19 Jan 2021 20:10:54 -0300 [thread overview] Message-ID: <20210119231055.2497880-1-festevam@gmail.com> (raw) Issuing a 'reboot' command in i.MX5 leads to the following flow: [ 24.557742] [<c0769b78>] (msm_atomic_commit_tail) from [<c06db0b4>] (commit_tail+0xa4/0x1b0) [ 24.566349] [<c06db0b4>] (commit_tail) from [<c06dbed0>] (drm_atomic_helper_commit+0x154/0x188) [ 24.575193] [<c06dbed0>] (drm_atomic_helper_commit) from [<c06db604>] (drm_atomic_helper_disable_all+0x154/0x1c0) [ 24.585599] [<c06db604>] (drm_atomic_helper_disable_all) from [<c06db704>] (drm_atomic_helper_shutdown+0x94/0x12c) [ 24.596094] [<c06db704>] (drm_atomic_helper_shutdown) from In the i.MX5 case, priv->kms is not populated (as i.MX5 does not use any of the Qualcomm display controllers), causing a NULL pointer dereference in msm_atomic_commit_tail(): [ 24.268964] 8<--- cut here --- [ 24.274602] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 24.283434] pgd = (ptrval) [ 24.286387] [00000000] *pgd=ca212831 [ 24.290788] Internal error: Oops: 17 [#1] SMP ARM [ 24.295609] Modules linked in: [ 24.298777] CPU: 0 PID: 197 Comm: init Not tainted 5.11.0-rc2-next-20210111 #333 [ 24.306276] Hardware name: Freescale i.MX53 (Device Tree Support) [ 24.312442] PC is at msm_atomic_commit_tail+0x54/0xb9c [ 24.317743] LR is at commit_tail+0xa4/0x1b0 Fix the problem by calling drm_atomic_helper_shutdown() conditionally. Cc: <stable@vger.kernel.org> Fixes: 9d5cbf5fe46e ("drm/msm: add shutdown support for display platform_driver") Suggested-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Fabio Estevam <festevam@gmail.com> --- Changes since v1: - Explain in the commit log that the problem happens after a 'reboot' command. drivers/gpu/drm/msm/msm_drv.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index 108c405e03dd..c082b72b9e3b 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -1311,7 +1311,8 @@ static void msm_pdev_shutdown(struct platform_device *pdev) { struct drm_device *drm = platform_get_drvdata(pdev); - drm_atomic_helper_shutdown(drm); + if (get_mdp_ver(pdev)) + drm_atomic_helper_shutdown(drm); } static const struct of_device_id dt_match[] = { -- 2.25.1 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
next reply other threads:[~2021-01-19 23:15 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-01-19 23:10 Fabio Estevam [this message] 2021-01-19 23:10 ` [PATCH v2 1/2] drm/msm: Call shutdown conditionally Fabio Estevam 2021-01-19 23:13 Fabio Estevam 2021-01-19 23:13 ` Fabio Estevam 2021-01-29 11:09 ` Fabio Estevam 2021-02-15 13:39 ` Fabio Estevam 2021-02-15 13:39 ` Fabio Estevam
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20210119231055.2497880-1-festevam@gmail.com \ --to=festevam@gmail.com \ --cc=airlied@linux.ie \ --cc=bjorn.andersson@linaro.org \ --cc=daniel@ffwll.ch \ --cc=dri-devel@lists.freedesktop.org \ --cc=jcrouse@codeaurora.org \ --cc=jonathan@marek.ca \ --cc=kalyan_t@codeaurora.org \ --cc=kernel@pengutronix.de \ --cc=mkrishn@codeaurora.org \ --cc=robdclark@gmail.com \ --cc=sean@poorly.run \ --cc=stable@vger.kernel.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.