From mboxrd@z Thu Jan 1 00:00:00 1970 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 4DD94C433FE for ; Sat, 1 Oct 2022 18:25:32 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E005D10E66F; Sat, 1 Oct 2022 18:25:25 +0000 (UTC) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id 565E310E581 for ; Sat, 1 Oct 2022 18:25:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1664648720; x=1696184720; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Esyvku5Wvj5Nc0rcwSG/YxeYzL/reEgvmWSYw4q8HTk=; b=BDZIzNcJlnInh5VVILsivr3YL5o0smcnJlolaoGfddCNDRwI4B/SZsAX bwfppVodSfJCnlDu6BnCGpLfIX3w6K5pu8byJkIaXqB/50ayZ70zSfeSJ tAc17VKdseGb6kCEoVgBko+WLvv7Rd1wBU3bSVQX/O90psOX6T1DsXcl3 0Y3oMWypWA0vJufJYGMDoGIftfGvvHnqQSxMpBr5zyE/DsM3AMrX27QF3 9KfAECnDgtRfPWf/QDjr8jEXSF09Huey9v1ihjat0uUJac5ulk3Jbt/xN EbjXi1sHx/5yCFoEAv7hZCo5ai301YdtJdHEoZQrKtBfxOvHz0fQhdmdM Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10487"; a="303893496" X-IronPort-AV: E=Sophos;i="5.93,361,1654585200"; d="scan'208";a="303893496" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Oct 2022 11:25:20 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10487"; a="685655052" X-IronPort-AV: E=Sophos;i="5.93,361,1654585200"; d="scan'208";a="685655052" Received: from stinkpipe.fi.intel.com (HELO stinkbox) ([10.237.72.191]) by fmsmga008.fm.intel.com with SMTP; 01 Oct 2022 11:25:17 -0700 Received: by stinkbox (sSMTP sendmail emulation); Sat, 01 Oct 2022 21:25:17 +0300 From: Ville Syrjala To: intel-gfx@lists.freedesktop.org Date: Sat, 1 Oct 2022 21:25:05 +0300 Message-Id: <20221001182505.3675-5-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221001182505.3675-1-ville.syrjala@linux.intel.com> References: <20221001182505.3675-1-ville.syrjala@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Intel-gfx] [PATCH v2 4/4] drm/i915: Fix locking in DRRS debugfs X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jani Nikula Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Ville Syrjälä Grab the crtc mutex so that looking at the crtc state is actually safe. Reviewed-by: Jani Nikula Signed-off-by: Ville Syrjälä --- drivers/gpu/drm/i915/display/intel_drrs.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_drrs.c b/drivers/gpu/drm/i915/display/intel_drrs.c index a5d6682475d1..2b94a62ef65a 100644 --- a/drivers/gpu/drm/i915/display/intel_drrs.c +++ b/drivers/gpu/drm/i915/display/intel_drrs.c @@ -301,8 +301,14 @@ void intel_crtc_drrs_init(struct intel_crtc *crtc) static int intel_drrs_debugfs_status_show(struct seq_file *m, void *unused) { struct intel_crtc *crtc = m->private; - const struct intel_crtc_state *crtc_state = - to_intel_crtc_state(crtc->base.state); + const struct intel_crtc_state *crtc_state; + int ret; + + ret = drm_modeset_lock_single_interruptible(&crtc->base.mutex); + if (ret) + return ret; + + crtc_state = to_intel_crtc_state(crtc->base.state); mutex_lock(&crtc->drrs.mutex); @@ -321,6 +327,8 @@ static int intel_drrs_debugfs_status_show(struct seq_file *m, void *unused) mutex_unlock(&crtc->drrs.mutex); + drm_modeset_unlock(&crtc->base.mutex); + return 0; } -- 2.35.1