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 <[email protected]>
---
 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 dbe72f1..a67ef23 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);
        }
-- 
2.7.4

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