diff options
Diffstat (limited to 'drivers/video/tegra/nvmap/nvmap.c')
| -rw-r--r-- | drivers/video/tegra/nvmap/nvmap.c | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/drivers/video/tegra/nvmap/nvmap.c b/drivers/video/tegra/nvmap/nvmap.c index 09f436102c6b..662646a2d6c6 100644 --- a/drivers/video/tegra/nvmap/nvmap.c +++ b/drivers/video/tegra/nvmap/nvmap.c @@ -3,7 +3,7 @@ * * Memory manager for Tegra GPU * - * Copyright (c) 2009-2014, NVIDIA CORPORATION. All rights reserved. + * Copyright (c) 2009-2017, NVIDIA CORPORATION. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -196,6 +196,9 @@ void *__nvmap_kmap(struct nvmap_handle *h, unsigned int pagenum) if (!h) return NULL; + if (!h->alloc) + goto out; + if (pagenum >= h->size >> PAGE_SHIFT) goto out; prot = nvmap_pgprot(h, PG_PROT_KERNEL); @@ -222,7 +225,7 @@ void __nvmap_kunmap(struct nvmap_handle *h, unsigned int pagenum, phys_addr_t paddr; struct vm_struct *area = NULL; - if (!h || + if (!h || !h->alloc || WARN_ON(!virt_addr_valid(h)) || WARN_ON(!addr)) return; @@ -266,7 +269,7 @@ void *__nvmap_mmap(struct nvmap_handle *h) return NULL; if (!h->alloc) - return NULL; + goto put_handle; prot = nvmap_pgprot(h, PG_PROT_KERNEL); @@ -276,7 +279,7 @@ void *__nvmap_mmap(struct nvmap_handle *h) pages = nvmap_pages(h->pgalloc.pages, h->size >> PAGE_SHIFT); if (!pages) - return NULL; + goto put_handle; vaddr = vm_map_ram(pages, h->size >> PAGE_SHIFT, -1, prot); nvmap_altfree(pages, @@ -296,10 +299,8 @@ void *__nvmap_mmap(struct nvmap_handle *h) adj_size = PAGE_ALIGN(adj_size); v = alloc_vm_area(adj_size, 0); - if (!v) { - nvmap_handle_put(h); - return NULL; - } + if (!v) + goto put_handle; p = v->addr + (h->carveout->base & ~PAGE_MASK); ioremap_page_range((ulong)v->addr, (ulong)v->addr + adj_size, @@ -309,11 +310,14 @@ void *__nvmap_mmap(struct nvmap_handle *h) * the handle will not be freed while the kernel mapping exists. * nvmap_handle_put will be called by unmapping this address */ return p; +put_handle: + nvmap_handle_put(h); + return NULL; } void __nvmap_munmap(struct nvmap_handle *h, void *addr) { - if (!h || + if (!h || !h->alloc || WARN_ON(!virt_addr_valid(h)) || WARN_ON(!addr)) return; @@ -447,6 +451,11 @@ struct sg_table *__nvmap_sg_table(struct nvmap_client *client, if (!h) return ERR_PTR(-EINVAL); + if (!h->alloc) { + err = -EINVAL; + goto put_handle; + } + npages = PAGE_ALIGN(h->size) >> PAGE_SHIFT; sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); if (!sgt) { @@ -476,6 +485,7 @@ struct sg_table *__nvmap_sg_table(struct nvmap_client *client, err: kfree(sgt); +put_handle: nvmap_handle_put(h); return ERR_PTR(err); } |