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staging: gasket: page table: use dma_mapping_error for error detection

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gasket_perform_mapping() call dma_mapping_error() to determine if
mapping failed.

Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Todd Poynor 2018-08-09 20:21:03 -07:00 committed by Greg Kroah-Hartman
parent 1fdd6d720c
commit 6c258edc64
1 changed files with 2 additions and 1 deletions
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3
drivers/staging/gasket/gasket_page_table.c
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@ -493,7 +493,8 @@ static int gasket_perform_mapping(struct gasket_page_table *pg_tbl,
(void *)page_to_pfn(page),
(unsigned long long)ptes[i].dma_addr);
if (ptes[i].dma_addr == -1) {
if (dma_mapping_error(pg_tbl->device,
ptes[i].dma_addr)) {
dev_dbg(pg_tbl->device,
"%s i %d -> fail to map page %llx "
"[pfn %p ohys %p]\n",