From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mga11.intel.com ([192.55.52.93]:41352 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753782AbcAGWuz (ORCPT ); Thu, 7 Jan 2016 17:50:55 -0500 From: Tomas Winkler To: Greg Kroah-Hartman , Wim Van Sebroeck , Guenter Roeck Cc: Alexander Usyskin , linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org, Tomas Winkler Subject: [char-misc-next v4 6/7] watchdog: mei_wdt: add activation debugfs entry Date: Fri, 8 Jan 2016 00:49:26 +0200 Message-Id: <1452206967-1144-7-git-send-email-tomas.winkler@intel.com> In-Reply-To: <1452206967-1144-1-git-send-email-tomas.winkler@intel.com> References: <1452206967-1144-1-git-send-email-tomas.winkler@intel.com> Sender: linux-watchdog-owner@vger.kernel.org List-Id: linux-watchdog@vger.kernel.org Add entry for displaying whether the device has activated or deactivated watchdog fw application. cat /mei_wdt/activation activated | deactivated Signed-off-by: Tomas Winkler --- V3: new in the series V4: Rebase the code over patchset : "watchdog: Replace driver based refcounting" drivers/watchdog/mei_wdt.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/watchdog/mei_wdt.c b/drivers/watchdog/mei_wdt.c index 85b27fc5d4ec..fe683e582566 100644 --- a/drivers/watchdog/mei_wdt.c +++ b/drivers/watchdog/mei_wdt.c @@ -493,6 +493,28 @@ static void mei_wdt_event(struct mei_cl_device *cldev, #if IS_ENABLED(CONFIG_DEBUG_FS) +static ssize_t mei_dbgfs_read_activation(struct file *file, char __user *ubuf, + size_t cnt, loff_t *ppos) +{ + struct mei_wdt *wdt = file->private_data; + const size_t bufsz = 32; + char buf[bufsz]; + ssize_t pos; + + mutex_lock(&wdt->reg_lock); + pos = scnprintf(buf, bufsz, "%s\n", + __mei_wdt_is_registered(wdt) ? "activated" : "deactivated"); + mutex_unlock(&wdt->reg_lock); + + return simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); +} + +static const struct file_operations dbgfs_fops_activation = { + .open = simple_open, + .read = mei_dbgfs_read_activation, + .llseek = generic_file_llseek, +}; + static ssize_t mei_dbgfs_read_state(struct file *file, char __user *ubuf, size_t cnt, loff_t *ppos) { @@ -532,6 +554,11 @@ static int dbgfs_register(struct mei_wdt *wdt) if (!f) goto err; + f = debugfs_create_file("activation", S_IRUSR, + dir, wdt, &dbgfs_fops_activation); + if (!f) + goto err; + return 0; err: dbgfs_unregister(wdt); -- 2.4.3