[PATCH] s390/ism: Add check for dma_set_max_seg_size in ism_probe()

[Ma Ke]

As the possible failure of the dma_set_max_seg_size(), we should better
check the return value of the dma_set_max_seg_size().

Fixes: 684b89bc39ce ("s390/ism: add device driver for internal shared memory")
Signed-off-by: Ma Ke <make24@xxxxxxxxxxx>
---
 drivers/s390/net/ism_drv.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/s390/net/ism_drv.c b/drivers/s390/net/ism_drv.c
index e36e3ea165d3..9ddd093a0368 100644
--- a/drivers/s390/net/ism_drv.c
+++ b/drivers/s390/net/ism_drv.c
@@ -620,7 +620,9 @@ static int ism_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		goto err_resource;
 
 	dma_set_seg_boundary(&pdev->dev, SZ_1M - 1);
-	dma_set_max_seg_size(&pdev->dev, SZ_1M);
+	ret = dma_set_max_seg_size(&pdev->dev, SZ_1M);
+	if (ret)
+		return ret;
 	pci_set_master(pdev);
 
 	ret = ism_dev_init(ism);
-- 
2.25.1