From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757106Ab2CTT5q (ORCPT ); Tue, 20 Mar 2012 15:57:46 -0400 Received: from mailout-de.gmx.net ([213.165.64.23]:50556 "HELO mailout-de.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1756270Ab2CTT5p (ORCPT ); Tue, 20 Mar 2012 15:57:45 -0400 X-Authenticated: #787645 X-Provags-ID: V01U2FsdGVkX1/oMXtZd4Toye/RizNza9sxttUoUXG2WDKC++dgML VrrpglBxw5KPCN Message-ID: <4F68E12C.8090807@gmx.net> Date: Tue, 20 Mar 2012 20:57:32 +0100 From: Witold Szczeponik User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:11.0) Gecko/20120312 Thunderbird/11.0 MIME-Version: 1.0 To: bhelgaas@google.com CC: "linux-kernel@vger.kernel.org" Subject: [PATCH 1/3] PNP: Simplify setting of resources References: <4F68D14B.60409@gmx.net> In-Reply-To: <4F68D14B.60409@gmx.net> Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch factors out the setting of PNP resources into one function which is then reused for all PNP resource types. This makes the code more concise and avoids duplication. The parameters "type" and "flags" are not used at the moment but will be used by follow-up patches. Placeholders for these patches can be found in the comment lines that contain the "TBD" marker. As the code does not make any changes to the ABI, no regressions are expected. NB: While at it, support for bus type resources is added. The patch is applied against Linux 3.3.x. Signed-off-by: Witold Szczeponik Index: linux/drivers/pnp/interface.c =================================================================== --- linux.orig/drivers/pnp/interface.c +++ linux/drivers/pnp/interface.c @@ -298,6 +298,39 @@ static ssize_t pnp_show_current_resource return ret; } +static char *pnp_get_resource_value(char *buf, + unsigned long type, + resource_size_t *start, + resource_size_t *end, + unsigned long *flags) +{ + if (start) + *start = 0; + if (end) + *end = 0; + if (flags) + *flags = 0; + + /* TBD: allow for disabled resources */ + + buf = skip_spaces(buf); + if (start) { + *start = simple_strtoull(buf, &buf, 0); + if (end) { + buf = skip_spaces(buf); + if (*buf == '-') { + buf = skip_spaces(buf + 1); + *end = simple_strtoull(buf, &buf, 0); + } else + *end = *start; + } + } + + /* TBD: allow for additional flags, e.g., IORESOURCE_WINDOW */ + + return buf; +} + static ssize_t pnp_set_current_resources(struct device *dmdev, struct device_attribute *attr, const char *ubuf, size_t count) @@ -305,7 +338,6 @@ static ssize_t pnp_set_current_resources struct pnp_dev *dev = to_pnp_dev(dmdev); char *buf = (void *)ubuf; int retval = 0; - resource_size_t start, end; if (dev->status & PNP_ATTACHED) { retval = -EBUSY; @@ -349,6 +381,10 @@ static ssize_t pnp_set_current_resources goto done; } if (!strnicmp(buf, "set", 3)) { + resource_size_t start; + resource_size_t end; + unsigned long flags; + if (dev->active) goto done; buf += 3; @@ -357,42 +393,42 @@ static ssize_t pnp_set_current_resources while (1) { buf = skip_spaces(buf); if (!strnicmp(buf, "io", 2)) { - buf = skip_spaces(buf + 2); - start = simple_strtoul(buf, &buf, 0); - buf = skip_spaces(buf); - if (*buf == '-') { - buf = skip_spaces(buf + 1); - end = simple_strtoul(buf, &buf, 0); - } else - end = start; - pnp_add_io_resource(dev, start, end, 0); - continue; - } - if (!strnicmp(buf, "mem", 3)) { - buf = skip_spaces(buf + 3); - start = simple_strtoul(buf, &buf, 0); - buf = skip_spaces(buf); - if (*buf == '-') { - buf = skip_spaces(buf + 1); - end = simple_strtoul(buf, &buf, 0); - } else - end = start; - pnp_add_mem_resource(dev, start, end, 0); - continue; - } - if (!strnicmp(buf, "irq", 3)) { - buf = skip_spaces(buf + 3); - start = simple_strtoul(buf, &buf, 0); - pnp_add_irq_resource(dev, start, 0); - continue; - } - if (!strnicmp(buf, "dma", 3)) { - buf = skip_spaces(buf + 3); - start = simple_strtoul(buf, &buf, 0); - pnp_add_dma_resource(dev, start, 0); - continue; - } - break; + buf = pnp_get_resource_value(buf + 2, + IORESOURCE_IO, + &start, + &end, + &flags); + pnp_add_io_resource(dev, start, end, flags); + } else if (!strnicmp(buf, "mem", 3)) { + buf = pnp_get_resource_value(buf + 3, + IORESOURCE_MEM, + &start, + &end, + &flags); + pnp_add_mem_resource(dev, start, end, flags); + } else if (!strnicmp(buf, "irq", 3)) { + buf = pnp_get_resource_value(buf + 3, + IORESOURCE_IRQ, + &start, + NULL, + &flags); + pnp_add_irq_resource(dev, start, flags); + } else if (!strnicmp(buf, "dma", 3)) { + buf = pnp_get_resource_value(buf + 3, + IORESOURCE_DMA, + &start, + NULL, + &flags); + pnp_add_dma_resource(dev, start, flags); + } else if (!strnicmp(buf, "bus", 3)) { + buf = pnp_get_resource_value(buf + 3, + IORESOURCE_BUS, + &start, + &end, + NULL); + pnp_add_bus_resource(dev, start, end); + } else + break; } mutex_unlock(&pnp_res_mutex); goto done;