linux-kernel - [PATCH 5.15 013/132] Watchdog: sp5100_tco: Move timer initialization into function

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220523165825.809764522@linuxfoundation.org>
Date:   Mon, 23 May 2022 19:03:42 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Robert Richter <rrichter@....com>,
        Terry Bowman <terry.bowman@....com>,
        Jean Delvare <jdelvare@...e.de>,
        Guenter Roeck <linux@...ck-us.net>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Mario Limonciello <Mario.Limonciello@....com>
Subject: [PATCH 5.15 013/132] Watchdog: sp5100_tco: Move timer initialization into function

From: Terry Bowman <terry.bowman@....com>

commit abd71a948f7aab47ca49d3e7fe6afa6c48c8aae0 upstream.

Refactor driver's timer initialization into new function. This is needed
inorder to support adding new device layouts while using common timer
initialization.

Co-developed-by: Robert Richter <rrichter@....com>
Signed-off-by: Robert Richter <rrichter@....com>
Signed-off-by: Terry Bowman <terry.bowman@....com>
Tested-by: Jean Delvare <jdelvare@...e.de>
Reviewed-by: Jean Delvare <jdelvare@...e.de>
Reviewed-by: Guenter Roeck <linux@...ck-us.net>
Link: https://lore.kernel.org/r/20220202153525.1693378-2-terry.bowman@amd.com
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@...ux-watchdog.org>
Cc: Mario Limonciello <Mario.Limonciello@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/watchdog/sp5100_tco.c |   65 +++++++++++++++++++++++-------------------
 1 file changed, 36 insertions(+), 29 deletions(-)

--- a/drivers/watchdog/sp5100_tco.c
+++ b/drivers/watchdog/sp5100_tco.c
@@ -215,6 +215,41 @@ static u32 sp5100_tco_read_pm_reg32(u8 i
 	return val;
 }
 
+static int sp5100_tco_timer_init(struct sp5100_tco *tco)
+{
+	struct watchdog_device *wdd = &tco->wdd;
+	struct device *dev = wdd->parent;
+	u32 val;
+
+	val = readl(SP5100_WDT_CONTROL(tco->tcobase));
+	if (val & SP5100_WDT_DISABLED) {
+		dev_err(dev, "Watchdog hardware is disabled\n");
+		return -ENODEV;
+	}
+
+	/*
+	 * Save WatchDogFired status, because WatchDogFired flag is
+	 * cleared here.
+	 */
+	if (val & SP5100_WDT_FIRED)
+		wdd->bootstatus = WDIOF_CARDRESET;
+
+	/* Set watchdog action to reset the system */
+	val &= ~SP5100_WDT_ACTION_RESET;
+	writel(val, SP5100_WDT_CONTROL(tco->tcobase));
+
+	/* Set a reasonable heartbeat before we stop the timer */
+	tco_timer_set_timeout(wdd, wdd->timeout);
+
+	/*
+	 * Stop the TCO before we change anything so we don't race with
+	 * a zeroed timer.
+	 */
+	tco_timer_stop(wdd);
+
+	return 0;
+}
+
 static int sp5100_tco_setupdevice(struct device *dev,
 				  struct watchdog_device *wdd)
 {
@@ -340,35 +375,7 @@ static int sp5100_tco_setupdevice(struct
 	/* Setup the watchdog timer */
 	tco_timer_enable(tco);
 
-	val = readl(SP5100_WDT_CONTROL(tco->tcobase));
-	if (val & SP5100_WDT_DISABLED) {
-		dev_err(dev, "Watchdog hardware is disabled\n");
-		ret = -ENODEV;
-		goto unreg_region;
-	}
-
-	/*
-	 * Save WatchDogFired status, because WatchDogFired flag is
-	 * cleared here.
-	 */
-	if (val & SP5100_WDT_FIRED)
-		wdd->bootstatus = WDIOF_CARDRESET;
-	/* Set watchdog action to reset the system */
-	val &= ~SP5100_WDT_ACTION_RESET;
-	writel(val, SP5100_WDT_CONTROL(tco->tcobase));
-
-	/* Set a reasonable heartbeat before we stop the timer */
-	tco_timer_set_timeout(wdd, wdd->timeout);
-
-	/*
-	 * Stop the TCO before we change anything so we don't race with
-	 * a zeroed timer.
-	 */
-	tco_timer_stop(wdd);
-
-	release_region(SP5100_IO_PM_INDEX_REG, SP5100_PM_IOPORTS_SIZE);
-
-	return 0;
+	ret = sp5100_tco_timer_init(tco);
 
 unreg_region:
 	release_region(SP5100_IO_PM_INDEX_REG, SP5100_PM_IOPORTS_SIZE);