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firmware/ivc: use dma_mapping_error 

DMA_ERROR_CODE is not supposed to be used by drivers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Christoph Hellwig 2017-05-21 12:33:39 +02:00
parent 41f1830f5a
commit 54ed812162
1 changed files with 2 additions and 2 deletions
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4
drivers/firmware/tegra/ivc.c
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@ -646,12 +646,12 @@ int tegra_ivc_init(struct tegra_ivc *ivc, struct device *peer, void *rx,
if (peer) {
ivc->rx.phys = dma_map_single(peer, rx, queue_size,
DMA_BIDIRECTIONAL);
if (ivc->rx.phys == DMA_ERROR_CODE)
if (dma_mapping_error(peer, ivc->rx.phys))
return -ENOMEM;
ivc->tx.phys = dma_map_single(peer, tx, queue_size,
DMA_BIDIRECTIONAL);
if (ivc->tx.phys == DMA_ERROR_CODE) {
if (dma_mapping_error(peer, ivc->tx.phys)) {
dma_unmap_single(peer, ivc->rx.phys, queue_size,
DMA_BIDIRECTIONAL);
return -ENOMEM;