From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751985AbcGRJOf (ORCPT ); Mon, 18 Jul 2016 05:14:35 -0400 Received: from mail-pa0-f41.google.com ([209.85.220.41]:34481 "EHLO mail-pa0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751675AbcGRJOb (ORCPT ); Mon, 18 Jul 2016 05:14:31 -0400 From: Anup Patel To: "Hans J. Koch" , Greg Kroah-Hartman , Jonathan Corbet Cc: Ankit Jindal , Jan Viktorin , Russell King - ARM Linux , Rob Herring , Mark Rutland , Ray Jui , Scott Branden , devicetree@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, bcm-kernel-feedback-list@broadcom.com, Anup Patel , linux-stable Subject: [PATCH v2 1/8] uio: fix dmem_region_start computation Date: Mon, 18 Jul 2016 14:44:13 +0530 Message-Id: <1468833260-5305-2-git-send-email-anup.patel@broadcom.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1468833260-5305-1-git-send-email-anup.patel@broadcom.com> References: <1468833260-5305-1-git-send-email-anup.patel@broadcom.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jan Viktorin The variable i contains a total number of resources (including IORESOURCE_IRQ). However, we want the dmem_region_start to point after the last resource of type IORESOURCE_MEM. The original behaviour leads (very likely) to skipping several UIO mapping regions and makes them useless. Fix this by computing dmem_region_start from the uiomem which points to the last used UIO mapping. Fixes: 0a0c3b5a24bd ("Add new uio device for dynamic memory allocation") Signed-off-by: Jan Viktorin Signed-off-by: Anup Patel Cc: linux-stable --- drivers/uio/uio_dmem_genirq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/uio/uio_dmem_genirq.c b/drivers/uio/uio_dmem_genirq.c index 915facb..e1134a4 100644 --- a/drivers/uio/uio_dmem_genirq.c +++ b/drivers/uio/uio_dmem_genirq.c @@ -229,7 +229,7 @@ static int uio_dmem_genirq_probe(struct platform_device *pdev) ++uiomem; } - priv->dmem_region_start = i; + priv->dmem_region_start = uiomem - &uioinfo->mem[0]; priv->num_dmem_regions = pdata->num_dynamic_regions; for (i = 0; i < pdata->num_dynamic_regions; ++i) { -- 1.9.1