devres: allow const resource arguments

BugLink: https://bugs.launchpad.net/bugs/1863019
[ Upstream commit 9dea44c91469512d346e638694c22c30a5273992 ]

devm_ioremap_resource() does not currently take 'const' arguments,
which results in a warning from the first driver trying to do it
anyway:

drivers/gpio/gpio-amd-fch.c: In function 'amd_fch_gpio_probe':
drivers/gpio/gpio-amd-fch.c:171:49: error: passing argument 2 of 'devm_ioremap_resource' discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]
  priv->base = devm_ioremap_resource(&pdev->dev, &amd_fch_gpio_iores);
                                                 ^~~~~~~~~~~~~~~~~~~

Change the prototype to allow it, as there is no real reason not to.

Fixes: 9bb2e0452508 ("gpio: amd: Make resource struct const")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20190628150049.1108048-1-arnd@arndb.de
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviwed-By: Enrico Weigelt <info@metux.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/include/linux/device.h b/include/linux/device.h
index 84aa3f0aa3138a8b377a3394486b6b06e3abae99..9b4dc8e54e961c664deccde49299785a05bc694e 100644 (file)
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -686,7 +686,8 @@ extern unsigned long devm_get_free_pages(struct device *dev,
                                         gfp_t gfp_mask, unsigned int order);
 extern void devm_free_pages(struct device *dev, unsigned long addr);
 
-void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res);
+void __iomem *devm_ioremap_resource(struct device *dev,
+                                   const struct resource *res);
 
 /* allows to add/remove a custom action to devres stack */
 int devm_add_action(struct device *dev, void (*action)(void *), void *data);

diff --git a/lib/devres.c b/lib/devres.c
index d5286472fcbc36b16fa8ff85ae4978e1157e2129..025d7cb6c82a4ba38e3296beeb803170b259796d 100644 (file)
--- a/lib/devres.c
+++ b/lib/devres.c
@@ -161,7 +161,8 @@ EXPORT_SYMBOL(devm_iounmap);
  *     if (IS_ERR(base))
  *             return PTR_ERR(base);
  */
-void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res)
+void __iomem *devm_ioremap_resource(struct device *dev,
+                                   const struct resource *res)
 {
        resource_size_t size;
        const char *name;