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| author | Ezequiel Garcia <ezequiel.garcia@free-electrons.com> | 2014-02-10 20:00:20 -0300 |
|---|---|---|
| committer | Jason Cooper <jason@lakedaemon.net> | 2014-02-22 03:42:25 +0000 |
| commit | bb02c662d641d51ea8c3ae9c828e89fbcfe04ba7 (patch) | |
| tree | b8c1a4dac2d02eed023d671b85ecd06396b14ae3 /drivers/watchdog | |
| parent | d86e9af6336c0ad586a5dbd70064253d40bbb5ff (diff) | |
| download | blackbird-op-linux-bb02c662d641d51ea8c3ae9c828e89fbcfe04ba7.tar.gz blackbird-op-linux-bb02c662d641d51ea8c3ae9c828e89fbcfe04ba7.zip | |
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 <linux@roeck-us.net>
Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Acked-by: Wim Van Sebroeck <wim@iguana.be>
Tested-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/orion_wdt.c | 29 |
1 files 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) |
