From patchwork Mon Aug 1 12:31:02 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jamie Iles X-Patchwork-Id: 1025902 Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by demeter2.kernel.org (8.14.4/8.14.4) with ESMTP id p71CVcjY005608 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 1 Aug 2011 12:32:00 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QnreY-0003ia-1V; Mon, 01 Aug 2011 12:31:26 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1QnreX-00023t-Ez; Mon, 01 Aug 2011 12:31:25 +0000 Received: from mail-ww0-f49.google.com ([74.125.82.49]) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QnreT-00022q-C5 for linux-arm-kernel@lists.infradead.org; Mon, 01 Aug 2011 12:31:22 +0000 Received: by wwf22 with SMTP id 22so3946423wwf.18 for ; Mon, 01 Aug 2011 05:31:18 -0700 (PDT) Received: by 10.227.42.2 with SMTP id q2mr6195215wbe.19.1312201878099; Mon, 01 Aug 2011 05:31:18 -0700 (PDT) Received: from localhost (gw-ba1.picochip.com [94.175.234.108]) by mx.google.com with ESMTPS id ff6sm4136140wbb.49.2011.08.01.05.31.16 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 01 Aug 2011 05:31:17 -0700 (PDT) From: Jamie Iles To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 1/9] davinci: make __arch_ioremap() with 0 size return NULL Date: Mon, 1 Aug 2011 13:31:02 +0100 Message-Id: <1312201870-12921-1-git-send-email-jamie@jamieiles.com> X-Mailer: git-send-email 1.7.4.1 X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110801_083121_546660_68C8EEED X-CRM114-Status: GOOD ( 12.64 ) X-Spam-Score: -0.7 (/) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (-0.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [74.125.82.49 listed in list.dnswl.org] Cc: Jamie Iles X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Mon, 01 Aug 2011 12:32:00 +0000 (UTC) Without __arch_ioremap(), __get_vm_area_node() with a zero size will return a NULL pointer. Make the arch specific ioremap() do the same thing. Cc: Sekhar Nori (supporter:TI DAVINCI MACHIN...) Cc: Kevin Hilman (supporter:TI DAVINCI MACHIN...) Signed-off-by: Jamie Iles --- arch/arm/mach-davinci/io.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-davinci/io.c b/arch/arm/mach-davinci/io.c index 8ea60a8..4eb169b 100644 --- a/arch/arm/mach-davinci/io.c +++ b/arch/arm/mach-davinci/io.c @@ -25,6 +25,9 @@ void __iomem *davinci_ioremap(unsigned long p, size_t size, unsigned int type) int desc_num = davinci_soc_info.io_desc_num; int i; + if (!size) + return NULL; + for (i = 0; i < desc_num; i++, desc++) { unsigned long iophys = __pfn_to_phys(desc->pfn); unsigned long iosize = desc->length;