linux-kernel - [PATCH v2] s390/ism: Add check for dma_set_max_seg_size in ism

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Message-Id: <20240627021314.2976443-1-make24@iscas.ac.cn>
Date: Thu, 27 Jun 2024 10:13:14 +0800
From: Ma Ke <make24@...as.ac.cn>
To: wintera@...ux.ibm.com,
	twinkler@...ux.ibm.com,
	hca@...ux.ibm.com,
	gor@...ux.ibm.com,
	agordeev@...ux.ibm.com,
	borntraeger@...ux.ibm.com,
	svens@...ux.ibm.com,
	bhelgaas@...gle.com
Cc: linux-s390@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Ma Ke <make24@...as.ac.cn>
Subject: [PATCH v2] s390/ism: Add check for dma_set_max_seg_size in ism_probe()

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: b0da3498c587 ("PCI: Remove pci_set_dma_max_seg_size()")
Signed-off-by: Ma Ke <make24@...as.ac.cn>
---
Changes in v2:
- modified the patch according to suggestions;
- modified Fixes line according to suggestions.
---
 drivers/s390/net/ism_drv.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/s390/net/ism_drv.c b/drivers/s390/net/ism_drv.c
index e36e3ea165d3..54f6638e889c 100644
--- a/drivers/s390/net/ism_drv.c
+++ b/drivers/s390/net/ism_drv.c
@@ -620,7 +620,10 @@ 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)
+		goto err_resource;
+
 	pci_set_master(pdev);
 
 	ret = ism_dev_init(ism);
-- 
2.25.1