linux-kernel - [PATCH next] PCI: endpoint: pci-ep-msi: Fix NULL vs IS_ERR() check in pci_epf_write_msi

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Message-ID: <aIzCdV8jyBeql-Oa@stanley.mountain>
Date: Fri, 1 Aug 2025 16:34:45 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Frank Li <Frank.Li@....com>
Cc: Manivannan Sadhasivam <mani@...nel.org>,
	Krzysztof Wilczyński <kwilczynski@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH next] PCI: endpoint: pci-ep-msi: Fix NULL vs IS_ERR() check
 in pci_epf_write_msi_msg()

The pci_epc_get() function returns error pointers.  It never returns NULL.
Update the check to match.

Fixes: 1c3b002c6bf6 ("PCI: endpoint: Add RC-to-EP doorbell support using platform MSI controller")
Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
---
 drivers/pci/endpoint/pci-ep-msi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/endpoint/pci-ep-msi.c b/drivers/pci/endpoint/pci-ep-msi.c
index 9ca89cbfec15..1b58357b905f 100644
--- a/drivers/pci/endpoint/pci-ep-msi.c
+++ b/drivers/pci/endpoint/pci-ep-msi.c
@@ -24,7 +24,7 @@ static void pci_epf_write_msi_msg(struct msi_desc *desc, struct msi_msg *msg)
 	struct pci_epf *epf;
 
 	epc = pci_epc_get(dev_name(msi_desc_to_dev(desc)));
-	if (!epc)
+	if (IS_ERR(epc))
 		return;
 
 	epf = list_first_entry_or_null(&epc->pci_epf, struct pci_epf, list);
-- 
2.47.2