diff options
| -rw-r--r-- | drivers/crypto/nx/nx.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/crypto/nx/nx.c b/drivers/crypto/nx/nx.c index bbdab6e..ad07dc6 100644 --- a/drivers/crypto/nx/nx.c +++ b/drivers/crypto/nx/nx.c @@ -114,13 +114,29 @@ struct nx_sg *nx_build_sg_list(struct nx_sg *sg_head, * have been described (or @sgmax elements have been written), the * loop ends. min_t is used to ensure @end_addr falls on the same page * as sg_addr, if not, we need to create another nx_sg element for the - * data on the next page */ + * data on the next page. + * + * Also when using vmalloc'ed data, every time that a system page + * boundary is crossed the physical address needs to be re-calculated. + */ for (sg = sg_head; sg_len < len; sg++) { + u64 next_page; + sg->addr = sg_addr; - sg_addr = min_t(u64, NX_PAGE_NUM(sg_addr + NX_PAGE_SIZE), end_addr); - sg->len = sg_addr - sg->addr; + sg_addr = min_t(u64, NX_PAGE_NUM(sg_addr + NX_PAGE_SIZE), + end_addr); + + next_page = (sg->addr & PAGE_MASK) + PAGE_SIZE; + sg->len = min_t(u64, sg_addr, next_page) - sg->addr; sg_len += sg->len; + if (sg_addr >= next_page && + is_vmalloc_addr(start_addr + sg_len)) { + sg_addr = page_to_phys(vmalloc_to_page( + start_addr + sg_len)); + end_addr = sg_addr + len - sg_len; + } + if ((sg - sg_head) == sgmax) { pr_err("nx: scatter/gather list overflow, pid: %d\n", current->pid); |