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Subject[PATCH 08/16] staging: gasket: page table: use dma_mapping_error for error detection
Date
From: Todd Poynor <toddpoynor@google.com>

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

Signed-off-by: Todd Poynor <toddpoynor@google.com>
---
drivers/staging/gasket/gasket_page_table.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c
index bd921dc6094de..4d2499269499b 100644
--- a/drivers/staging/gasket/gasket_page_table.c
+++ b/drivers/staging/gasket/gasket_page_table.c
@@ -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",
--
2.18.0.597.ga71716f1ad-goog
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