PCI: endpoint: pci-epf-vntb: Return -ENOENT if pci_epc_get_next_free_bar() fails

[ Upstream commit 7ea488cce73263231662e426639dd3e836537068 ]

According the function documentation of epf_ntb_init_epc_bar(), the
function should return an error code on error. However, it returns -1 when
no BAR is available i.e., when pci_epc_get_next_free_bar() fails.

Return -ENOENT instead.

Fixes: e35f56bb0330 ("PCI: endpoint: Support NTB transfer between RC and EP")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
[mani: changed err code to -ENOENT]
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20250603-pci-vntb-bar-mapping-v2-1-fc685a22ad28@baylibre.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/pci/endpoint/functions/pci-epf-vntb.c b/drivers/pci/endpoint/functions/pci-epf-vntb.c
index 874cb097b093ae645bbc4bf3c9d28ca812d7689d..3cddfdd04029379386991a10e0ec85c0969ce00d 100644 (file)
--- a/drivers/pci/endpoint/functions/pci-epf-vntb.c
+++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c
@@ -700,7 +700,7 @@ static int epf_ntb_init_epc_bar(struct epf_ntb *ntb)
                barno = pci_epc_get_next_free_bar(epc_features, barno);
                if (barno < 0) {
                        dev_err(dev, "Fail to get NTB function BAR\n");
-                       return barno;
+                       return -ENOENT;
                }
                ntb->epf_ntb_bar[bar] = barno;
        }