Re: [PATCH 2/7] watchdog: jz4740: Use devm_* functions
From: Guenter Roeck <linux@roeck-us.net>
Date: 2017-12-28 17:48:17
Also in:
linux-mips, linux-watchdog, lkml
On 12/28/2017 08:29 AM, Paul Cercueil wrote:
quoted hunk ↗ jump to hunk
- Use devm_clk_get instead of clk_get - Use devm_watchdog_register_device instead of watchdog_register_device Signed-off-by: Paul Cercueil <paul@crapouillou.net> --- drivers/watchdog/jz4740_wdt.c | 27 ++++++++------------------- 1 file changed, 8 insertions(+), 19 deletions(-)diff --git a/drivers/watchdog/jz4740_wdt.c b/drivers/watchdog/jz4740_wdt.c index 6955deb100ef..92d6ca8ceb49 100644 --- a/drivers/watchdog/jz4740_wdt.c +++ b/drivers/watchdog/jz4740_wdt.c@@ -178,40 +178,29 @@ static int jz4740_wdt_probe(struct platform_device *pdev) res = platform_get_resource(pdev, IORESOURCE_MEM, 0); drvdata->base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(drvdata->base)) { - ret = PTR_ERR(drvdata->base); - goto err_out; - } + if (IS_ERR(drvdata->base)) + return PTR_ERR(drvdata->base); - drvdata->rtc_clk = clk_get(&pdev->dev, "rtc"); + drvdata->rtc_clk = devm_clk_get(&pdev->dev, "rtc"); if (IS_ERR(drvdata->rtc_clk)) { dev_err(&pdev->dev, "cannot find RTC clock\n"); - ret = PTR_ERR(drvdata->rtc_clk); - goto err_out; + return PTR_ERR(drvdata->rtc_clk); } - ret = watchdog_register_device(&drvdata->wdt); + ret = devm_watchdog_register_device(&pdev->dev, &drvdata->wdt); if (ret < 0) - goto err_disable_clk; + return ret; platform_set_drvdata(pdev, drvdata); - return 0; -err_disable_clk: - clk_put(drvdata->rtc_clk); -err_out: - return ret; + return 0; } static int jz4740_wdt_remove(struct platform_device *pdev) { struct jz4740_wdt_drvdata *drvdata = platform_get_drvdata(pdev); - jz4740_wdt_stop(&drvdata->wdt); - watchdog_unregister_device(&drvdata->wdt); - clk_put(drvdata->rtc_clk); - - return 0; + return jz4740_wdt_stop(&drvdata->wdt);
If the watchdog is running, the module can not be unloaded. Even if that wasn't the case, this defeats both WDIOF_MAGICCLOSE and watchdog_set_nowayout(). Are you sure this is what you want ? If so, please call watchdog_stop_on_unregister() before registration; this clarifies that this is what you want, and you can drop the remove function. Thanks, Guenter
}
static struct platform_driver jz4740_wdt_driver = {