Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 13 Jan 2003 00:32:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 13 Jan 2003 00:32:24 -0500 Received: from samar.sasken.com ([164.164.56.2]:6277 "EHLO samar.sasken.com") by vger.kernel.org with ESMTP id ; Mon, 13 Jan 2003 00:32:23 -0500 Date: Mon, 13 Jan 2003 11:11:04 +0530 (IST) From: Madhavi To: Subject: writel hang problem Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi I am writing a device driver for a PCI device on linux 2.4.19 and i386 processor. I am initializing the memory mapped IO for this device in the same way as it is shown in linux/drivers/net/pci-skeleton.c. I am using readl and writel for accessing this PCI memory mapped IO. The problem I am facing is - When I try to write to a particular configuration register in this PCI MMIO region, the system hangs. I am able to write properly and read back the contents from other registers in this PCI MMIO region. * Could anyone tell me why this might be happening? * Could anyone tell me for what all reasons writel might hang? When I request for an IRQ, I got an error which says: "PCI: No IRQ known for interrupt pin A of device 00:e0.0. Using IRQ 11" * Could this problem be related to the system hang problem in any way. Is this IRQ problem fatal? I seem to be getting some interrupts from my device, though they are not the same as expected. Could anyone tell me what might be happening? Thanks in advance. regards Madhavi. - 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/