From bb02c662d641d51ea8c3ae9c828e89fbcfe04ba7 Mon Sep 17 00:00:00 2001 From: Ezequiel Garcia Date: Mon, 10 Feb 2014 20:00:20 -0300 Subject: [PATCH] watchdog: orion: Add clock error handling This commit adds a check for clk_prepare_enable success and introduces an error path to disable the clock properly. Reviewed-by: Guenter Roeck Tested-by: Sebastian Hesselbarth Tested-by: Willy Tarreau Signed-off-by: Ezequiel Garcia Acked-by: Wim Van Sebroeck Tested-By: Jason Gunthorpe Signed-off-by: Jason Cooper --- drivers/watchdog/orion_wdt.c | 29 +++++++++++++++++++---------- 1 file changed, 19 insertions(+), 10 deletions(-) diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c index f7722a424676..7f19fa3b543d 100644 --- a/drivers/watchdog/orion_wdt.c +++ b/drivers/watchdog/orion_wdt.c @@ -151,17 +151,24 @@ static int orion_wdt_probe(struct platform_device *pdev) clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(clk)) { dev_err(&pdev->dev, "Orion Watchdog missing clock\n"); - return -ENODEV; + return PTR_ERR(clk); } - clk_prepare_enable(clk); + ret = clk_prepare_enable(clk); + if (ret) + return ret; wdt_tclk = clk_get_rate(clk); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; + if (!res) { + ret = -ENODEV; + goto disable_clk; + } + wdt_reg = devm_ioremap(&pdev->dev, res->start, resource_size(res)); - if (!wdt_reg) - return -ENOMEM; + if (!wdt_reg) { + ret = -ENOMEM; + goto disable_clk; + } wdt_max_duration = WDT_MAX_CYCLE_COUNT / wdt_tclk; @@ -171,14 +178,16 @@ static int orion_wdt_probe(struct platform_device *pdev) watchdog_set_nowayout(&orion_wdt, nowayout); ret = watchdog_register_device(&orion_wdt); - if (ret) { - clk_disable_unprepare(clk); - return ret; - } + if (ret) + goto disable_clk; pr_info("Initial timeout %d sec%s\n", orion_wdt.timeout, nowayout ? ", nowayout" : ""); return 0; + +disable_clk: + clk_disable_unprepare(clk); + return ret; } static int orion_wdt_remove(struct platform_device *pdev) -- 2.11.0