diff options
Diffstat (limited to 'drivers/tee/optee/core.c')
-rw-r--r-- | drivers/tee/optee/core.c | 44 |
1 files changed, 23 insertions, 21 deletions
diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c index d01ca47f7bde..0c7336077a7b 100644 --- a/drivers/tee/optee/core.c +++ b/drivers/tee/optee/core.c @@ -26,46 +26,46 @@ int optee_pool_op_alloc_helper(struct tee_shm_pool *pool, struct tee_shm *shm, size_t num_pages, unsigned long start)) { - unsigned int order = get_order(size); - struct page *page; + size_t nr_pages = roundup(size, PAGE_SIZE) / PAGE_SIZE; + struct page **pages; + unsigned int i; int rc = 0; /* * Ignore alignment since this is already going to be page aligned * and there's no need for any larger alignment. */ - page = alloc_pages(GFP_KERNEL | __GFP_ZERO, order); - if (!page) + shm->kaddr = alloc_pages_exact(nr_pages * PAGE_SIZE, + GFP_KERNEL | __GFP_ZERO); + if (!shm->kaddr) return -ENOMEM; - shm->kaddr = page_address(page); - shm->paddr = page_to_phys(page); - shm->size = PAGE_SIZE << order; + shm->paddr = virt_to_phys(shm->kaddr); + shm->size = nr_pages * PAGE_SIZE; - if (shm_register) { - unsigned int nr_pages = 1 << order, i; - struct page **pages; + pages = kcalloc(nr_pages, sizeof(*pages), GFP_KERNEL); + if (!pages) { + rc = -ENOMEM; + goto err; + } - pages = kcalloc(nr_pages, sizeof(*pages), GFP_KERNEL); - if (!pages) { - rc = -ENOMEM; - goto err; - } + for (i = 0; i < nr_pages; i++) + pages[i] = virt_to_page((u8 *)shm->kaddr + i * PAGE_SIZE); - for (i = 0; i < nr_pages; i++) - pages[i] = page + i; + shm->pages = pages; + shm->num_pages = nr_pages; + if (shm_register) { rc = shm_register(shm->ctx, shm, pages, nr_pages, (unsigned long)shm->kaddr); - kfree(pages); if (rc) goto err; } return 0; - err: - free_pages((unsigned long)shm->kaddr, order); + free_pages_exact(shm->kaddr, shm->size); + shm->kaddr = NULL; return rc; } @@ -75,8 +75,10 @@ void optee_pool_op_free_helper(struct tee_shm_pool *pool, struct tee_shm *shm, { if (shm_unregister) shm_unregister(shm->ctx, shm); - free_pages((unsigned long)shm->kaddr, get_order(shm->size)); + free_pages_exact(shm->kaddr, shm->size); shm->kaddr = NULL; + kfree(shm->pages); + shm->pages = NULL; } static void optee_bus_scan(struct work_struct *work) |