[PATCH AUTOSEL 4.19 045/671] NTB: ntb_hw_idt: replace IS_ERR_OR_NULL with regular NULL checks

[Sasha Levin <sashal@kernel.org>]

From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>

[ Upstream commit 1b7619828d0c341612f58683e73f279c37e70bbc ]

Both devm_kcalloc() and devm_kzalloc() return NULL on error. They
never return error pointers.

The use of IS_ERR_OR_NULL is currently applied to the wrong
context.

Fix this by replacing IS_ERR_OR_NULL with regular NULL checks.

Fixes: bf2a952d31d2 ("NTB: Add IDT 89HPESxNTx PCIe-switches support")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/ntb/hw/idt/ntb_hw_idt.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/ntb/hw/idt/ntb_hw_idt.c b/drivers/ntb/hw/idt/ntb_hw_idt.c
index dbe72f116017..a67ef23e81bc 100644
--- a/drivers/ntb/hw/idt/ntb_hw_idt.c
+++ b/drivers/ntb/hw/idt/ntb_hw_idt.c
@@ -1105,9 +1105,9 @@ static struct idt_mw_cfg *idt_scan_mws(struct idt_ntb_dev *ndev, int port,
 	}
 
 	/* Allocate memory for memory window descriptors */
-	ret_mws = devm_kcalloc(&ndev->ntb.pdev->dev, *mw_cnt,
-				sizeof(*ret_mws), GFP_KERNEL);
-	if (IS_ERR_OR_NULL(ret_mws))
+	ret_mws = devm_kcalloc(&ndev->ntb.pdev->dev, *mw_cnt, sizeof(*ret_mws),
+			       GFP_KERNEL);
+	if (!ret_mws)
 		return ERR_PTR(-ENOMEM);
 
 	/* Copy the info of detected memory windows */
@@ -2390,7 +2390,7 @@ static struct idt_ntb_dev *idt_create_dev(struct pci_dev *pdev,
 
 	/* Allocate memory for the IDT PCIe-device descriptor */
 	ndev = devm_kzalloc(&pdev->dev, sizeof(*ndev), GFP_KERNEL);
-	if (IS_ERR_OR_NULL(ndev)) {
+	if (!ndev) {
 		dev_err(&pdev->dev, "Memory allocation failed for descriptor");
 		return ERR_PTR(-ENOMEM);
 	}
-- 
2.20.1