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@xxxxxxxxx>
---
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 d17eda753..6a7475ad7 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -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;
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 8fdd3cf97..812e6b583 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -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 *);
--
2.39.1
