Commit 80df83c2 authored by Heiner Kallweit's avatar Heiner Kallweit Committed by Ulf Hansson
Browse files

mmc: core: add devm_mmc_alloc_host 



Add a device-managed version of mmc_alloc_host().

The argument order is reversed compared to mmc_alloc_host() because
device-managed functions typically have the device argument first.

Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/6d8f9fdc-7c9e-8e4f-e6ef-5470b971c74e@gmail.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 56f34e8d

drivers/mmc/core/host.c

+26 −0
Original line number Diff line number Diff line
@@ -588,6 +588,32 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev) 


EXPORT_SYMBOL(mmc_alloc_host);



static void devm_mmc_host_release(struct device *dev, void *res)

{

	mmc_free_host(*(struct mmc_host **)res);

}



struct mmc_host *devm_mmc_alloc_host(struct device *dev, int extra)

{

	struct mmc_host **dr, *host;



	dr = devres_alloc(devm_mmc_host_release, sizeof(*dr), GFP_KERNEL);

	if (!dr)

		return ERR_PTR(-ENOMEM);



	host = mmc_alloc_host(extra, dev);

	if (IS_ERR(host)) {

		devres_free(dr);

		return host;

	}



	*dr = host;

	devres_add(dev, dr);



	return host;

}

EXPORT_SYMBOL(devm_mmc_alloc_host);



static int mmc_validate_host_caps(struct mmc_host *host)

{

	struct device *dev = host->parent;

include/linux/mmc/host.h

+1 −0
Original line number Diff line number Diff line
@@ -527,6 +527,7 @@ struct mmc_host { 
struct device_node;



struct mmc_host *mmc_alloc_host(int extra, struct device *);

struct mmc_host *devm_mmc_alloc_host(struct device *dev, int extra);

int mmc_add_host(struct mmc_host *);

void mmc_remove_host(struct mmc_host *);

void mmc_free_host(struct mmc_host *);