diff --git a/drivers/staging/android/ashmem.c b/drivers/staging/android/ashmem.c index f13aab21da4a2533f7b7e534fa5f0000154e1d80..f39983c87c2975ab08dcbf61f3b4f199cef1fe38 100644 --- a/drivers/staging/android/ashmem.c +++ b/drivers/staging/android/ashmem.c @@ -672,10 +672,12 @@ static long ashmem_ioctl(struct file *file, unsigned int cmd, unsigned long arg) break; case ASHMEM_SET_SIZE: ret = -EINVAL; + mutex_lock(&ashmem_mutex); if (!asma->file) { ret = 0; asma->size = (size_t) arg; } + mutex_unlock(&ashmem_mutex); break; case ASHMEM_GET_SIZE: ret = asma->size;