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| author |   Sam Protsenko <semen.protsenko@linaro.org> | 2021-11-21 18:56:38 +0200 |
|---|---|---|
| committer |   Wim Van Sebroeck <wim@linux-watchdog.org> | 2021-12-28 13:59:01 +0100 |
| commit | f197d47584be621d634ad7fdfad3e62c8c13ce24 (patch) | |
| tree | 2a677f234ae486088c741a734354a7d5bfa35acc /drivers/watchdog | |
| parent | dt-bindings: watchdog: Document Exynos850 watchdog bindings (diff) | |
| download | wireguard-linux-f197d47584be621d634ad7fdfad3e62c8c13ce24.tar.xz wireguard-linux-f197d47584be621d634ad7fdfad3e62c8c13ce24.zip | |
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 <semen.protsenko@linaro.org>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Suggested-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20211107202943.8859-4-semen.protsenko@linaro.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/s3c2410_wdt.c | 21 |
1 files changed, 10 insertions, 11 deletions
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 */ |