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Commit 3b4a6877 authored by Vivek Gautam's avatar Vivek Gautam Committed by Greg Kroah-Hartman
Browse files

nvmem: core: Allow ignoring length when reading a cell 



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: default avatarVivek Gautam <vivek.gautam@codeaurora.org>
Reviewed-by: default avatarStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1e928fff

drivers/nvmem/core.c

+4 −2
Original line number Diff line number Diff line
@@ -970,6 +970,7 @@ static int __nvmem_cell_read(struct nvmem_device *nvmem, 
	if (cell->bit_offset || cell->nbits)

		nvmem_shift_read_buffer_in_place(cell, buf);



	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().