From patchwork Mon Dec 10 12:04:21 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sharat Masetty X-Patchwork-Id: 10721173 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1757018E8 for ; Mon, 10 Dec 2018 12:04:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 05F9B2857D for ; Mon, 10 Dec 2018 12:04:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EE1E428628; Mon, 10 Dec 2018 12:04:38 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id EEE262857D for ; Mon, 10 Dec 2018 12:04:37 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 14B886E3E2; Mon, 10 Dec 2018 12:04:36 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from smtp.codeaurora.org (smtp.codeaurora.org [198.145.29.96]) by gabe.freedesktop.org (Postfix) with ESMTPS id BEB656E3E2; Mon, 10 Dec 2018 12:04:34 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 87ED16083C; Mon, 10 Dec 2018 12:04:34 +0000 (UTC) Received: from smasetty-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: smasetty@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 42FD2604BE; Mon, 10 Dec 2018 12:04:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 42FD2604BE From: Sharat Masetty To: freedreno@lists.freedesktop.org Subject: [PATCH 1/2] drm/msm/adreno: Make adreno_gpu_state_get() return void Date: Mon, 10 Dec 2018 17:34:21 +0530 Message-Id: <1544443462-28736-1-git-send-email-smasetty@codeaurora.org> X-Mailer: git-send-email 1.9.1 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-msm@vger.kernel.org, Sharat Masetty , dri-devel@lists.freedesktop.org MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP We are not really checking the state of the adreno_gpu_state_get() function at the callers and in addition the state capture is mostly a best effort service, so make the function return void. Signed-off-by: Sharat Masetty Reviewed-by: Jordan Crouse --- drivers/gpu/drm/msm/adreno/adreno_gpu.c | 4 +--- drivers/gpu/drm/msm/adreno/adreno_gpu.h | 2 +- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c index 1ca4bea..40bcf32 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c @@ -380,7 +380,7 @@ bool adreno_idle(struct msm_gpu *gpu, struct msm_ringbuffer *ring) return false; } -int adreno_gpu_state_get(struct msm_gpu *gpu, struct msm_gpu_state *state) +void adreno_gpu_state_get(struct msm_gpu *gpu, struct msm_gpu_state *state) { struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); int i, count = 0; @@ -437,8 +437,6 @@ int adreno_gpu_state_get(struct msm_gpu *gpu, struct msm_gpu_state *state) state->nr_registers = count; } - - return 0; } void adreno_gpu_state_destroy(struct msm_gpu_state *state) diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h index 4973c8c..d4834b3 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h @@ -235,7 +235,7 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev, void adreno_gpu_state_destroy(struct msm_gpu_state *state); -int adreno_gpu_state_get(struct msm_gpu *gpu, struct msm_gpu_state *state); +void adreno_gpu_state_get(struct msm_gpu *gpu, struct msm_gpu_state *state); int adreno_gpu_state_put(struct msm_gpu_state *state); /* ringbuffer helpers (the parts that are adreno specific) */ From patchwork Mon Dec 10 12:04:22 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sharat Masetty X-Patchwork-Id: 10721177 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8349913BF for ; Mon, 10 Dec 2018 12:04:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 725712847F for ; Mon, 10 Dec 2018 12:04:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 665EF285BD; Mon, 10 Dec 2018 12:04:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 267222847F for ; Mon, 10 Dec 2018 12:04:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B69436E3FA; Mon, 10 Dec 2018 12:04:39 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from smtp.codeaurora.org (smtp.codeaurora.org [198.145.29.96]) by gabe.freedesktop.org (Postfix) with ESMTPS id 100C86E3F6; Mon, 10 Dec 2018 12:04:38 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1000) id B291F6081A; Mon, 10 Dec 2018 12:04:37 +0000 (UTC) Received: from smasetty-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: smasetty@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id B80876081A; Mon, 10 Dec 2018 12:04:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org B80876081A From: Sharat Masetty To: freedreno@lists.freedesktop.org Subject: [PATCH 2/2] drm/msm/a6xx: Fix NULL dereference during crashstate capture Date: Mon, 10 Dec 2018 17:34:22 +0530 Message-Id: <1544443462-28736-2-git-send-email-smasetty@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1544443462-28736-1-git-send-email-smasetty@codeaurora.org> References: <1544443462-28736-1-git-send-email-smasetty@codeaurora.org> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-msm@vger.kernel.org, Sharat Masetty , dri-devel@lists.freedesktop.org MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP The gpu crashstate's base objects registers pointer can be NULL if the target implementation decides to capture the register dump on its own. This patch simply checks for NULL before dereferencing. Signed-off-by: Sharat Masetty --- drivers/gpu/drm/msm/adreno/adreno_gpu.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c index 40bcf32..a39cebc 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c @@ -415,6 +415,9 @@ void adreno_gpu_state_get(struct msm_gpu *gpu, struct msm_gpu_state *state) } } + if (!adreno_gpu->registers) + return; + /* Count the number of registers */ for (i = 0; adreno_gpu->registers[i] != ~0; i += 2) count += adreno_gpu->registers[i + 1] - @@ -550,12 +553,14 @@ void adreno_show(struct msm_gpu *gpu, struct msm_gpu_state *state, } } - drm_puts(p, "registers:\n"); + if (state->nr_registers > 0) { + drm_puts(p, "registers:\n"); - for (i = 0; i < state->nr_registers; i++) { - drm_printf(p, " - { offset: 0x%04x, value: 0x%08x }\n", - state->registers[i * 2] << 2, - state->registers[(i * 2) + 1]); + for (i = 0; i < state->nr_registers; i++) { + drm_printf(p, " - { offset: 0x%04x, value: 0x%08x }\n", + state->registers[i * 2] << 2, + state->registers[(i * 2) + 1]); + } } } #endif