diff options
| -rw-r--r-- | drivers/staging/gasket/gasket_page_table.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c index 8364b49f147c..964146f0df52 100644 --- a/drivers/staging/gasket/gasket_page_table.c +++ b/drivers/staging/gasket/gasket_page_table.c @@ -902,6 +902,17 @@ static int gasket_alloc_extended_subtable(struct gasket_page_table *pg_tbl, /* Map the page into DMA space. */ pte->dma_addr = dma_map_page(pg_tbl->device, pte->page, 0, PAGE_SIZE, DMA_TO_DEVICE); + if (dma_mapping_error(pg_tbl->device, pte->dma_addr)) { + dev_dbg(pg_tbl->device, + "%s: fail to map page [pfn %lx phys %llx]\n", + __func__, page_to_pfn(pte->page), + page_to_phys(pte->page)); + + free_page(page_addr); + vfree(pte->sublevel); + memset(pte, 0, sizeof(struct gasket_page_table_entry)); + return -ENOMEM; + } /* make the addresses available to the device */ dma_addr = (pte->dma_addr + pte->offset) | GASKET_VALID_SLOT_FLAG; |