Commit 666d6a36 authored Jun 09, 2017 by Heiner Kallweit Committed by Greg Kroah-Hartman Jun 09, 2017

nvmem: core: add locking to nvmem_find_cell



Adding entries to nvmem_cells and deleting entries from it is
protected by nvmem_cells_mutex. Therefore this mutex should
also protect iterating over the list.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 79fbf046

drivers/nvmem/core.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -287,9 +287,15 @@ static struct nvmem_cell nvmem_find_cell(const char cell_id)
		{
		struct nvmem_cell *p;

		mutex_lock(&nvmem_cells_mutex);

		list_for_each_entry(p, &nvmem_cells, node)
		if (p && !strcmp(p->name, cell_id))
		if (p && !strcmp(p->name, cell_id)) {
		mutex_unlock(&nvmem_cells_mutex);
		return p;
		}

		mutex_unlock(&nvmem_cells_mutex);

		return NULL;
		}