From: Vivek Gautam <vivek.gau...@codeaurora.org>
nvmem_cell_read() API fills in the argument 'len' with
the number of bytes read from the cell. Many users don't
care about this length value. So allow users to pass a
NULL pointer to this len field.
Signed-off-by: Vivek Gautam <vivek.gau...@codeaurora.org>
Reviewed-by: Stephen Boyd <sb...@codeaurora.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandaga...@linaro.org>
---
drivers/nvmem/core.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 398ea7f..78aa06a 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -970,7 +970,8 @@ static int __nvmem_cell_read(struct nvmem_device *nvmem,
if (cell->bit_offset || cell->nbits)
nvmem_shift_read_buffer_in_place(cell, buf);
- *len = cell->bytes;
+ if (len)
+ *len = cell->bytes;
return 0;
}
@@ -979,7 +980,8 @@ static int __nvmem_cell_read(struct nvmem_device *nvmem,
* nvmem_cell_read() - Read a given nvmem cell
*
* @cell: nvmem cell to be read.
- * @len: pointer to length of cell which will be populated on successful read.
+ * @len: pointer to length of cell which will be populated on successful read;
+ * can be NULL.
*
* Return: ERR_PTR() on error or a valid pointer to a buffer on success. The
* buffer should be freed by the consumer with a kfree().
--
2.7.4
