diff mbox series

[v2,10/12] cxl: Do not ignore PCI config read errors in match_add_dports()

Message ID 20221018132341.76259-11-rrichter@amd.com
State Superseded
Headers show
Series cxl: Add support for Restricted CXL hosts (RCD mode) | expand

Commit Message

Robert Richter Oct. 18, 2022, 1:23 p.m. UTC 
The link capabilities of a PCI device are read when enumerating its
dports. This is done by reading the PCI config space. If that fails
port enumeration ignores that error. However, reading the PCI config
space should reliably work.

To reduce some complexity to the code flow when factoring out parts of
the code in match_add_dports() for later reuse, change this to throw
an error.

Signed-off-by: Robert Richter <rrichter@amd.com>
---
 drivers/cxl/core/pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/cxl/core/pci.c b/drivers/cxl/core/pci.c
index 0dbbe8d39b07..8271b8abde7a 100644
--- a/drivers/cxl/core/pci.c
+++ b/drivers/cxl/core/pci.c
@@ -47,7 +47,7 @@  static int match_add_dports(struct pci_dev *pdev, void *data)
 		return 0;
 	if (pci_read_config_dword(pdev, pci_pcie_cap(pdev) + PCI_EXP_LNKCAP,
 				  &lnkcap))
-		return 0;
+		return -ENXIO;
 
 	rc = cxl_find_regblock(pdev, CXL_REGLOC_RBI_COMPONENT, &map);
 	if (rc)