From: Rajendra Nayak <rnayak@codeaurora.org> To: robdclark@gmail.com, sean@poorly.run Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Rajendra Nayak <rnayak@codeaurora.org> Subject: [PATCH] drm/msm/dpu: dev_pm_opp_put_clkname() only when an opp_table exists Date: Mon, 20 Jul 2020 17:47:56 +0530 [thread overview] Message-ID: <1595247476-12968-1-git-send-email-rnayak@codeaurora.org> (raw) Its possible that dpu_bind() fails early enough before dev_pm_opp_set_clkname() is called. In such cases, unconditionally calling dev_pm_opp_put_clkname() in dpu_unbind() can result in a crash. Put an additional check so that dev_pm_opp_put_clkname() is called only when an opp_table exists. Fixes: aa3950767d05 ("drm/msm/dpu: Use OPP API to set clk/perf state") Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> --- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index f2bbce4..843a1c1 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -1079,7 +1079,8 @@ static void dpu_unbind(struct device *dev, struct device *master, void *data) if (dpu_kms->has_opp_table) dev_pm_opp_of_remove_table(dev); - dev_pm_opp_put_clkname(dpu_kms->opp_table); + if (dpu_kms->opp_table) + dev_pm_opp_put_clkname(dpu_kms->opp_table); } static const struct component_ops dpu_ops = { -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
WARNING: multiple messages have this Message-ID (diff)
From: Rajendra Nayak <rnayak@codeaurora.org> To: robdclark@gmail.com, sean@poorly.run Cc: linux-arm-msm@vger.kernel.org, Rajendra Nayak <rnayak@codeaurora.org>, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH] drm/msm/dpu: dev_pm_opp_put_clkname() only when an opp_table exists Date: Mon, 20 Jul 2020 17:47:56 +0530 [thread overview] Message-ID: <1595247476-12968-1-git-send-email-rnayak@codeaurora.org> (raw) Its possible that dpu_bind() fails early enough before dev_pm_opp_set_clkname() is called. In such cases, unconditionally calling dev_pm_opp_put_clkname() in dpu_unbind() can result in a crash. Put an additional check so that dev_pm_opp_put_clkname() is called only when an opp_table exists. Fixes: aa3950767d05 ("drm/msm/dpu: Use OPP API to set clk/perf state") Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> --- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index f2bbce4..843a1c1 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -1079,7 +1079,8 @@ static void dpu_unbind(struct device *dev, struct device *master, void *data) if (dpu_kms->has_opp_table) dev_pm_opp_of_remove_table(dev); - dev_pm_opp_put_clkname(dpu_kms->opp_table); + if (dpu_kms->opp_table) + dev_pm_opp_put_clkname(dpu_kms->opp_table); } static const struct component_ops dpu_ops = { -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
next reply other threads:[~2020-07-20 12:21 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-20 12:17 Rajendra Nayak [this message] 2020-07-20 12:17 ` [PATCH] drm/msm/dpu: dev_pm_opp_put_clkname() only when an opp_table exists Rajendra Nayak 2020-07-20 12:57 ` Sai Prakash Ranjan 2020-07-20 12:57 ` Sai Prakash Ranjan
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