diff options
| author | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2017-07-06 11:42:01 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2017-07-07 13:14:12 +0200 |
| commit | 735ae2056b3c7296bb188d079c020f606a679c4a (patch) | |
| tree | e1662976fdd97074f037b6131c78c503a84008d1 /drivers/rtc | |
| parent | 3068a254d5519cd5116f61297462da6d1aa84c20 (diff) | |
| download | linux-735ae2056b3c7296bb188d079c020f606a679c4a.tar.bz2 | |
rtc: at91rm9200: remove race condition
While highly unlikely, it is possible to get an interrupt as soon as it is
requested. In that case, at91_rtc_interrupt() will be called with rtc ==
NULL.
Solve that by using devm_rtc_allocate_device/rtc_register_device.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-at91rm9200.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c index b60fd477778f..e221b78b6f10 100644 --- a/drivers/rtc/rtc-at91rm9200.c +++ b/drivers/rtc/rtc-at91rm9200.c @@ -409,6 +409,11 @@ static int __init at91_rtc_probe(struct platform_device *pdev) return -ENOMEM; } + rtc = devm_rtc_allocate_device(&pdev->dev); + if (IS_ERR(rtc)) + return PTR_ERR(rtc); + platform_set_drvdata(pdev, rtc); + sclk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(sclk)) return PTR_ERR(sclk); @@ -441,13 +446,10 @@ static int __init at91_rtc_probe(struct platform_device *pdev) if (!device_can_wakeup(&pdev->dev)) device_init_wakeup(&pdev->dev, 1); - rtc = devm_rtc_device_register(&pdev->dev, pdev->name, - &at91_rtc_ops, THIS_MODULE); - if (IS_ERR(rtc)) { - ret = PTR_ERR(rtc); + rtc->ops = &at91_rtc_ops; + ret = rtc_register_device(rtc); + if (ret) goto err_clk; - } - platform_set_drvdata(pdev, rtc); /* enable SECEV interrupt in order to initialize at91_rtc_upd_rdy * completion. |