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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0E611C6FA8E for ; Mon, 27 Feb 2023 02:13:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230352AbjB0CNR (ORCPT ); Sun, 26 Feb 2023 21:13:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41374 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230476AbjB0CMv (ORCPT ); Sun, 26 Feb 2023 21:12:51 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 449651CF51; Sun, 26 Feb 2023 18:11:09 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id AC8A460DCE; Mon, 27 Feb 2023 02:10:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 194A6C433D2; Mon, 27 Feb 2023 02:10:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1677463845; bh=5f/skvzZj321aeDw/krFgpagVEFdy1BwmkGYx2X8iEk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mYDyH//Z/cnewoRaWbM1t9u1Wm7gyVi4kfJAewgf5vVMpytgqWjY1Nl1+A/ZCFNgY XqVabNdw4IjBnkqsBeW2qHn7Tg/gcWKXYjct7ZvTwhpwfD4ANXarTbHmtWuEDSKzOF wYeBDCUF8vvLWSAJ+aBo+tmsIjfpc8w5PD3EeXLVOr0ne4Ipd9QL97KqmdDF0ak9Pw iDlFQxbF01jIcr7YsHkixlKQxT61jMyOYx2Dgig27vfb8Lli0UfW4BA7sGSR/jxfuV k0bLhoT/DUrxn6iBen4nF4cVt6/2oe6Ods+KhN4wX/kVzTCrmvfp3a8VHPc/5tN6Tu KUELnmpHZAHAw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Tomi Valkeinen , kernel test robot , Arnd Bergmann , Sasha Levin , tomba@kernel.org, airlied@gmail.com, daniel@ffwll.ch, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.4 02/15] drm/omap: dsi: Fix excessive stack usage Date: Sun, 26 Feb 2023 21:10:21 -0500 Message-Id: <20230227021038.1052958-2-sashal@kernel.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230227021038.1052958-1-sashal@kernel.org> References: <20230227021038.1052958-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tomi Valkeinen [ Upstream commit cfca78971b9233aef0891507a98fba62046d4542 ] dsi_dump_dsi_irqs(), a function used for debugfs prints, has a large struct in its frame, which can result in: drivers/gpu/drm/omapdrm/dss/dsi.c:1126:1: warning: the frame size of 1060 bytes is larger than 1024 bytes [-Wframe-larger-than=] As the performance of the function is of no concern, let's allocate the struct with kmalloc instead. Compile-tested only. Signed-off-by: Tomi Valkeinen Reported-by: kernel test robot Reviewed-by: Arnd Bergmann Link: https://patchwork.freedesktop.org/patch/msgid/20220916082206.167427-1-tomi.valkeinen@ideasonboard.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/omapdrm/dss/dsi.c | 26 ++++++++++++++++---------- 1 file changed, 16 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c index b30fcaa2d0f55..993d48fb8064d 100644 --- a/drivers/gpu/drm/omapdrm/dss/dsi.c +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c @@ -1444,22 +1444,26 @@ static int dsi_dump_dsi_irqs(struct seq_file *s, void *p) { struct dsi_data *dsi = s->private; unsigned long flags; - struct dsi_irq_stats stats; + struct dsi_irq_stats *stats; + + stats = kmalloc(sizeof(*stats), GFP_KERNEL); + if (!stats) + return -ENOMEM; spin_lock_irqsave(&dsi->irq_stats_lock, flags); - stats = dsi->irq_stats; + *stats = dsi->irq_stats; memset(&dsi->irq_stats, 0, sizeof(dsi->irq_stats)); dsi->irq_stats.last_reset = jiffies; spin_unlock_irqrestore(&dsi->irq_stats_lock, flags); seq_printf(s, "period %u ms\n", - jiffies_to_msecs(jiffies - stats.last_reset)); + jiffies_to_msecs(jiffies - stats->last_reset)); - seq_printf(s, "irqs %d\n", stats.irq_count); + seq_printf(s, "irqs %d\n", stats->irq_count); #define PIS(x) \ - seq_printf(s, "%-20s %10d\n", #x, stats.dsi_irqs[ffs(DSI_IRQ_##x)-1]); + seq_printf(s, "%-20s %10d\n", #x, stats->dsi_irqs[ffs(DSI_IRQ_##x)-1]); seq_printf(s, "-- DSI%d interrupts --\n", dsi->module_id + 1); PIS(VC0); @@ -1483,10 +1487,10 @@ static int dsi_dump_dsi_irqs(struct seq_file *s, void *p) #define PIS(x) \ seq_printf(s, "%-20s %10d %10d %10d %10d\n", #x, \ - stats.vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \ - stats.vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \ - stats.vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \ - stats.vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]); + stats->vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \ + stats->vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \ + stats->vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \ + stats->vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]); seq_printf(s, "-- VC interrupts --\n"); PIS(CS); @@ -1502,7 +1506,7 @@ static int dsi_dump_dsi_irqs(struct seq_file *s, void *p) #define PIS(x) \ seq_printf(s, "%-20s %10d\n", #x, \ - stats.cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]); + stats->cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]); seq_printf(s, "-- CIO interrupts --\n"); PIS(ERRSYNCESC1); @@ -1527,6 +1531,8 @@ static int dsi_dump_dsi_irqs(struct seq_file *s, void *p) PIS(ULPSACTIVENOT_ALL1); #undef PIS + kfree(stats); + return 0; } #endif -- 2.39.0