Patch "nvmem: core: add nvmem_dev_size() helper" has been added to the 6.6-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    nvmem: core: add nvmem_dev_size() helper

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     nvmem-core-add-nvmem_dev_size-helper.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit cc38da4e2f0781f754e454db0f9734590c16592d
Author: Rafał Miłecki <rafal@xxxxxxxxxx>
Date:   Thu Dec 21 18:34:17 2023 +0100

    nvmem: core: add nvmem_dev_size() helper
    
    [ Upstream commit 33cf42e68efc8ff529a7eee08a4f0ba8c8d0a207 ]
    
    This is required by layouts that need to read whole NVMEM content. It's
    especially useful for NVMEM devices without hardcoded layout (like
    U-Boot environment data block).
    
    Signed-off-by: Rafał Miłecki <rafal@xxxxxxxxxx>
    Reviewed-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
    Link: https://lore.kernel.org/r/20231221173421.13737-2-zajec5@xxxxxxxxx
    Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
    Stable-dep-of: 8679e8b4a1eb ("nvmem: u-boot-env: error if NVMEM device is too small")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index e7fd1315d7ed..f28c005c2bb2 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -2131,6 +2131,19 @@ const char *nvmem_dev_name(struct nvmem_device *nvmem)
 }
 EXPORT_SYMBOL_GPL(nvmem_dev_name);
 
+/**
+ * nvmem_dev_size() - Get the size of a given nvmem device.
+ *
+ * @nvmem: nvmem device.
+ *
+ * Return: size of the nvmem device.
+ */
+size_t nvmem_dev_size(struct nvmem_device *nvmem)
+{
+	return nvmem->size;
+}
+EXPORT_SYMBOL_GPL(nvmem_dev_size);
+
 static int __init nvmem_init(void)
 {
 	return bus_register(&nvmem_bus_type);
diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
index 4523e4e83319..526025561df1 100644
--- a/include/linux/nvmem-consumer.h
+++ b/include/linux/nvmem-consumer.h
@@ -81,6 +81,7 @@ int nvmem_device_cell_write(struct nvmem_device *nvmem,
 			    struct nvmem_cell_info *info, void *buf);
 
 const char *nvmem_dev_name(struct nvmem_device *nvmem);
+size_t nvmem_dev_size(struct nvmem_device *nvmem);
 
 void nvmem_add_cell_lookups(struct nvmem_cell_lookup *entries,
 			    size_t nentries);