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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>
hifive-unleashed-5.1
Heiner Kallweit 2017-06-09 10:59:09 +01:00 committed by Greg Kroah-Hartman
parent 79fbf0468b
commit 666d6a3623
1 changed files with 7 additions and 1 deletions
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8
drivers/nvmem/core.c
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@ -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;
}