Add mmc_bdev_to_card() helper which is needed for finding EFI entry
on EMMC of NVIDIA Tegra devices.
Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
---
drivers/mmc/core/block.c | 15 +++++++++++++++
include/linux/mmc/blkdev.h | 13 +++++++++++++
2 files changed, 28 insertions(+)
create mode 100644 include/linux/mmc/blkdev.h
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index fe5892d30778..666066fd6037 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -40,6 +40,7 @@
#include <linux/debugfs.h>
#include <linux/mmc/ioctl.h>
+#include <linux/mmc/blkdev.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
@@ -306,6 +307,20 @@ static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
return ret;
}
+struct mmc_card *mmc_bdev_to_card(struct block_device *bdev)
+{
+ struct mmc_blk_data *md;
+
+ if (bdev->bd_disk->major != MMC_BLOCK_MAJOR)
+ return NULL;
+
+ md = mmc_blk_get(bdev->bd_disk);
+ if (!md)
+ return NULL;
+
+ return md->queue.card;
+}
+
static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
{
struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
diff --git a/include/linux/mmc/blkdev.h b/include/linux/mmc/blkdev.h
new file mode 100644
index 000000000000..67608c58de70
--- /dev/null
+++ b/include/linux/mmc/blkdev.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * linux/include/linux/mmc/blkdev.h
+ */
+#ifndef LINUX_MMC_BLOCK_DEVICE_H
+#define LINUX_MMC_BLOCK_DEVICE_H
+
+struct block_device;
+struct mmc_card;
+
+struct mmc_card *mmc_bdev_to_card(struct block_device *bdev);
+
+#endif /* LINUX_MMC_BLOCK_DEVICE_H */
--
2.30.2
