[Letux-kernel] [PATCH v7 1/2] power: supply: twl4030-charger: move irq allocation to just before irqs are enabled

H. Nikolaus Schaller hns at goldelico.com
Mon Jul 3 18:36:06 CEST 2017


Hi,

> Am 03.07.2017 um 14:55 schrieb Sebastian Reichel <sebastian.reichel at collabora.co.uk>:
> 
> Hi,
> 
> On Mon, Jun 19, 2017 at 10:41:45AM +0200, H. Nikolaus Schaller wrote:
>> And initialize workers and notifiers as soon as possible.
>> 
>> This avoids a potential race if irqs are enabled and triggered too early
>> before the worker is properly set up.
>> 
>> Suggested-by: Grygorii Strashko <grygorii.strashko at ti.com>
>> Signed-off-by: H. Nikolaus Schaller <hns at goldelico.com>
>> ---
>> drivers/power/supply/twl4030_charger.c | 29 +++++++++++++++--------------
>> 1 file changed, 15 insertions(+), 14 deletions(-)
>> 
>> diff --git a/drivers/power/supply/twl4030_charger.c b/drivers/power/supply/twl4030_charger.c
>> index 1fbbe0cc216a..9d974f1e3957 100644
>> --- a/drivers/power/supply/twl4030_charger.c
>> +++ b/drivers/power/supply/twl4030_charger.c
>> @@ -984,12 +984,27 @@ static int twl4030_bci_probe(struct platform_device *pdev)
>> 
>> 	platform_set_drvdata(pdev, bci);
>> 
>> +	INIT_WORK(&bci->work, twl4030_bci_usb_work);
>> +	INIT_DELAYED_WORK(&bci->current_worker, twl4030_current_worker);
>> +
>> 	bci->channel_vac = devm_iio_channel_get(&pdev->dev, "vac");
>> 	if (IS_ERR(bci->channel_vac)) {
>> 		bci->channel_vac = NULL;
>> 		dev_warn(&pdev->dev, "could not request vac iio channel");
>> 	}
>> 
>> +	if (bci->dev->of_node) {
>> +		struct device_node *phynode;
>> +
>> +		phynode = of_find_compatible_node(bci->dev->of_node->parent,
>> +						  NULL, "ti,twl4030-usb");
>> +		if (phynode) {
>> +			bci->transceiver = devm_usb_get_phy_by_node(
>> +				bci->dev, phynode, &bci->usb_nb);
>> +			bci->usb_nb.notifier_call = twl4030_bci_usb_ncb;
> 
> those two should be the other way around.

Seems to work as well (and avoids another potential race condition).

v8 coming instantly.

BR and thanks,
Nikolaus

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