Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932924Ab2JWMyq (ORCPT ); Tue, 23 Oct 2012 08:54:46 -0400 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:51369 "EHLO opensource.wolfsonmicro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757006Ab2JWMyp (ORCPT ); Tue, 23 Oct 2012 08:54:45 -0400 From: Dimitris Papastamos To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman Subject: [PATCH 2/3 v2] firmware: Add /proc/firmware_path entry to list the firmware paths Date: Tue, 23 Oct 2012 13:52:55 +0100 Message-Id: <1350996776-17864-3-git-send-email-dp@opensource.wolfsonmicro.com> X-Mailer: git-send-email 1.8.0 In-Reply-To: <1350996776-17864-1-git-send-email-dp@opensource.wolfsonmicro.com> References: <1350996776-17864-1-git-send-email-dp@opensource.wolfsonmicro.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2853 Lines: 108 This patch provides the aforementioned procfs file that lists the default firmware paths that are used during firmware lookup. The file contains a white space separated list of paths. There will be another patch on top of this that adds the functionality to modify the paths at runtime. Signed-off-by: Dimitris Papastamos --- drivers/base/firmware_class.c | 55 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c index d76152b..322fff3 100644 --- a/drivers/base/firmware_class.c +++ b/drivers/base/firmware_class.c @@ -27,6 +27,8 @@ #include #include #include +#include +#include #include @@ -1468,6 +1470,56 @@ err_fwp_alloc: return -ENOMEM; } +static void *fw_path_seq_start(struct seq_file *seq, loff_t *pos) +{ + return seq_list_start_head(&fw_path_list, *pos); +} + +static void *fw_path_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + return seq_list_next(v, &fw_path_list, pos); +} + +static int fw_path_seq_show(struct seq_file *seq, void *v) +{ + const struct fw_path_rec *fwp; + struct list_head *l = v; + + if (l == &fw_path_list) + return 0; + fwp = list_entry(v, struct fw_path_rec, list); + seq_puts(seq, fwp->name); + if (l->next != &fw_path_list) + seq_putc(seq, ' '); + else + seq_putc(seq, '\n'); + return 0; +} + +static void fw_path_seq_stop(struct seq_file *seq, void *v) +{ +} + +static const struct seq_operations fw_path_ops = { + .start = fw_path_seq_start, + .next = fw_path_seq_next, + .stop = fw_path_seq_stop, + .show = fw_path_seq_show, +}; + +static int fw_path_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &fw_path_ops); +} + +static const struct file_operations fw_path_seq_fops = { + .owner = THIS_MODULE, + .open = fw_path_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + static void __init fw_cache_init(void) { spin_lock_init(&fw_cache.lock); @@ -1501,6 +1553,8 @@ static int __init firmware_class_init(void) return ret; } + proc_create("firmware_path", S_IRUGO, NULL, &fw_path_seq_fops); + return class_register(&firmware_class); } @@ -1510,6 +1564,7 @@ static void __exit firmware_class_exit(void) unregister_syscore_ops(&fw_syscore_ops); unregister_pm_notifier(&fw_cache.pm_notify); #endif + remove_proc_entry("firmware_path", NULL); fw_free_path_list(); class_unregister(&firmware_class); } -- 1.8.0 -- 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/