mmc: core: add devm_mmc_alloc_host

[linux-2.6-microblaze.git] / drivers / mmc / core / host.c

diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index d17eda7..6a7475a 100644 (file)
--- 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;