From f197d47584be621d634ad7fdfad3e62c8c13ce24 Mon Sep 17 00:00:00 2001 From: Sam Protsenko Date: Sun, 21 Nov 2021 18:56:38 +0200 Subject: watchdog: s3c2410: Fail probe if can't find valid timeout Driver can't work properly if there no valid timeout was found in s3c2410wdt_set_heartbeat(). Ideally, that function should be reworked in a way that it's always able to find some valid timeout. As a temporary solution let's for now just fail the driver probe in case the valid timeout can't be found in s3c2410wdt_set_heartbeat() function. Signed-off-by: Sam Protsenko Reported-by: Guenter Roeck Suggested-by: Guenter Roeck Reviewed-by: Krzysztof Kozlowski Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20211107202943.8859-4-semen.protsenko@linaro.org Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck --- drivers/watchdog/s3c2410_wdt.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) (limited to 'drivers/watchdog') diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c index 2395f353e52d..00421cf22556 100644 --- a/drivers/watchdog/s3c2410_wdt.c +++ b/drivers/watchdog/s3c2410_wdt.c @@ -515,7 +515,6 @@ static int s3c2410wdt_probe(struct platform_device *pdev) struct s3c2410_wdt *wdt; struct resource *wdt_irq; unsigned int wtcon; - int started = 0; int ret; wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL); @@ -581,15 +580,15 @@ static int s3c2410wdt_probe(struct platform_device *pdev) ret = s3c2410wdt_set_heartbeat(&wdt->wdt_device, wdt->wdt_device.timeout); if (ret) { - started = s3c2410wdt_set_heartbeat(&wdt->wdt_device, - S3C2410_WATCHDOG_DEFAULT_TIME); - - if (started == 0) - dev_info(dev, - "tmr_margin value out of range, default %d used\n", + ret = s3c2410wdt_set_heartbeat(&wdt->wdt_device, + S3C2410_WATCHDOG_DEFAULT_TIME); + if (ret == 0) { + dev_warn(dev, "tmr_margin value out of range, default %d used\n", S3C2410_WATCHDOG_DEFAULT_TIME); - else - dev_info(dev, "default timer value is out of range, cannot start\n"); + } else { + dev_err(dev, "failed to use default timeout\n"); + goto err_cpufreq; + } } ret = devm_request_irq(dev, wdt_irq->start, s3c2410wdt_irq, 0, @@ -613,10 +612,10 @@ static int s3c2410wdt_probe(struct platform_device *pdev) if (ret < 0) goto err_unregister; - if (tmr_atboot && started == 0) { + if (tmr_atboot) { dev_info(dev, "starting watchdog timer\n"); s3c2410wdt_start(&wdt->wdt_device); - } else if (!tmr_atboot) { + } else { /* if we're not enabling the watchdog, then ensure it is * disabled if it has been left running from the bootloader * or other source */ -- cgit v1.2.3-59-g8ed1b