From: Heiner Kallweit hkallweit1@gmail.com
[ 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 --- drivers/mmc/core/host.c | 26 ++++++++++++++++++++++++++ include/linux/mmc/host.h | 1 + 2 files changed, 27 insertions(+)
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 03e2f965a96a8..1f46694b2e531 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -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) { diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 40d7e98fc9902..fb294cbb9081d 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -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 *);