Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753189Ab3FJJO0 (ORCPT ); Mon, 10 Jun 2013 05:14:26 -0400 Received: from hqemgate03.nvidia.com ([216.228.121.140]:4265 "EHLO hqemgate03.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753141Ab3FJJOY (ORCPT ); Mon, 10 Jun 2013 05:14:24 -0400 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Mon, 10 Jun 2013 02:13:02 -0700 From: Tuomas Tynkkynen To: CC: , , , Tuomas Tynkkynen Subject: [PATCH 1/2] memory: tegra20-mc: Fix hang in IRQ handler. Date: Mon, 10 Jun 2013 12:13:43 +0300 Message-ID: <1370855624-30564-2-git-send-email-ttynkkynen@nvidia.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1370855624-30564-1-git-send-email-ttynkkynen@nvidia.com> References: <1370855624-30564-1-git-send-email-ttynkkynen@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 988 Lines: 33 In Tegra20 memory controller any MC interrupt would cause an infinite loop in the IRQ handler. Signed-off-by: Tuomas Tynkkynen --- drivers/memory/tegra20-mc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/memory/tegra20-mc.c b/drivers/memory/tegra20-mc.c index 2ca5f28..bd5a553 100644 --- a/drivers/memory/tegra20-mc.c +++ b/drivers/memory/tegra20-mc.c @@ -193,8 +193,11 @@ static irqreturn_t tegra20_mc_isr(int irq, void *data) mask &= stat; if (!mask) return IRQ_NONE; - while ((bit = ffs(mask)) != 0) + while ((bit = ffs(mask)) != 0) { tegra20_mc_decode(mc, bit - 1); + mask &= BIT(bit); + } + mc_writel(mc, stat, MC_INTSTATUS); return IRQ_HANDLED; } -- 1.8.1.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/