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Code Issues Releases Wiki Activity

Revert "driver core: platform: Make platform_get_irq_optional() optional"

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This reverts commit ed7027fdf4 as it
causes runtime issues:
	https://lore.kernel.org/r/20210406192514.GA34677@roeck-us.net

Link: https://lore.kernel.org/r/20210406192514.GA34677@roeck-us.net
Reported-by: Guenter Roeck <linux@roeck-us.net>
Cc: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2021-04-07 11:47:56 +02:00
parent 6e11b376fd
commit c2f3f755f5
1 changed files with 21 additions and 34 deletions
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55
drivers/base/platform.c
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@ -168,7 +168,25 @@ devm_platform_ioremap_resource_byname(struct platform_device *pdev,
EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource_byname);
#endif /* CONFIG_HAS_IOMEM */
static int platform_do_get_irq(struct platform_device *dev, unsigned int num)
/**
* platform_get_irq_optional - get an optional IRQ for a device
* @dev: platform device
* @num: IRQ number index
*
* Gets an IRQ for a platform device. Device drivers should check the return
* value for errors so as to not pass a negative integer value to the
* request_irq() APIs. This is the same as platform_get_irq(), except that it
* does not print an error message if an IRQ can not be obtained.
*
* For example::
*
* int irq = platform_get_irq_optional(pdev, 0);
* if (irq < 0)
* return irq;
*
* Return: non-zero IRQ number on success, negative error number on failure.
*/
int platform_get_irq_optional(struct platform_device *dev, unsigned int num)
{
int ret;
#ifdef CONFIG_SPARC
@ -236,37 +254,6 @@ static int platform_do_get_irq(struct platform_device *dev, unsigned int num)
WARN(ret == 0, "0 is an invalid IRQ number\n");
return ret;
}
/**
* platform_get_irq_optional - get an optional IRQ for a device
* @dev: platform device
* @num: IRQ number index
*
* Gets an IRQ for a platform device. Device drivers should check the return
* value for errors so as to not pass a negative integer value to the
* request_irq() APIs. This is the same as platform_get_irq(), except that it
* does not print an error message if an IRQ can not be obtained and returns
* 0 when IRQ resource has not been found.
*
* For example::
*
* int irq = platform_get_irq_optional(pdev, 0);
* if (irq < 0)
* return irq;
* if (irq > 0)
* ...we have IRQ line defined...
*
* Return: non-zero IRQ number on success, negative error number on failure.
*/
int platform_get_irq_optional(struct platform_device *dev, unsigned int num)
{
int ret;
ret = platform_do_get_irq(dev, num);
if (ret == -ENXIO)
return 0;
return ret;
}
EXPORT_SYMBOL_GPL(platform_get_irq_optional);
/**
@ -290,7 +277,7 @@ int platform_get_irq(struct platform_device *dev, unsigned int num)
{
int ret;
ret = platform_do_get_irq(dev, num);
ret = platform_get_irq_optional(dev, num);
if (ret < 0 && ret != -EPROBE_DEFER)
dev_err(&dev->dev, "IRQ index %u not found\n", num);
@ -308,7 +295,7 @@ int platform_irq_count(struct platform_device *dev)
{
int ret, nr = 0;
while ((ret = platform_do_get_irq(dev, nr)) >= 0)
while ((ret = platform_get_irq_optional(dev, nr)) >= 0)
nr++;
if (ret == -EPROBE_DEFER)