This is a note to let you know that I've just added the patch titled
drivers: provide devm_platform_ioremap_resource()
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drivers-provide-devm_platform_ioremap_resource.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 17a5bcaed6ff4fa7dd95614539ea0eebcaca5b56
Author: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
Date: Wed Feb 20 11:12:39 2019 +0000
drivers: provide devm_platform_ioremap_resource()
[ Upstream commit 7945f929f1a77a1c8887a97ca07f87626858ff42 ]
There are currently 1200+ instances of using platform_get_resource()
and devm_ioremap_resource() together in the kernel tree.
This patch wraps these two calls in a single helper. Thanks to that
we don't have to declare a local variable for struct resource * and can
omit the redundant argument for resource type. We also have one
function call less.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Stable-dep-of: 8ab5fc55d7f6 ("serial: arc_uart: fix of_iomap leak in `arc_serial_probe`")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 349c2754eed78..ea83c279b8a36 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -80,6 +80,24 @@ struct resource *platform_get_resource(struct platform_device *dev,
}
EXPORT_SYMBOL_GPL(platform_get_resource);
+/**
+ * devm_platform_ioremap_resource - call devm_ioremap_resource() for a platform
+ * device
+ *
+ * @pdev: platform device to use both for memory resource lookup as well as
+ * resource managemend
+ * @index: resource index
+ */
+void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev,
+ unsigned int index)
+{
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, index);
+ return devm_ioremap_resource(&pdev->dev, res);
+}
+EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource);
+
/**
* platform_get_irq - get an IRQ for a device
* @dev: platform device
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 1a9f38f27f656..9e5c98fcea8c6 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -51,6 +51,9 @@ extern struct device platform_bus;
extern void arch_setup_pdev_archdata(struct platform_device *);
extern struct resource *platform_get_resource(struct platform_device *,
unsigned int, unsigned int);
+extern void __iomem *
+devm_platform_ioremap_resource(struct platform_device *pdev,
+ unsigned int index);
extern int platform_get_irq(struct platform_device *, unsigned int);
extern int platform_irq_count(struct platform_device *);
extern struct resource *platform_get_resource_byname(struct platform_device *,
