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mmc: core: add devm_mmc_alloc_host

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[ Upstream commit 80df83c2c57e75cb482ccf0c639ce84703ab41a2 ]

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: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/6d8f9fdc-7c9e-8e4f-e6ef-5470b971c74e@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Stable-dep-of: b8ada54fa1b8 ("mmc: meson-gx: fix deferred probing")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Heiner Kallweit
2023-02-04 00:53:35 +01:00
committed by Greg Kroah-Hartman
parent d523ce6f51
commit 50ed76c9e0
2 changed files with 27 additions and 0 deletions
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26
drivers/mmc/core/host.c
View File

@@ -513,6 +513,32 @@ 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)
{
if (host->caps & MMC_CAP_SDIO_IRQ && !host->ops->enable_sdio_irq) {

1
include/linux/mmc/host.h
View File

@@ -477,6 +477,7 @@ 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 *);