[PATCH 6/7] cxl/pci: Use pci core's DVSEC functionality

[Ben Widawsky <ben.widawsky@intel.com>]

Reduce maintenance burden of DVSEC query implementation by using the
centralized PCI core implementation.

Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
---
 drivers/cxl/pci.c | 20 +-------------------
 1 file changed, 1 insertion(+), 19 deletions(-)

diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index 7c1d5d5aef6e..040379f727ad 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -340,25 +340,7 @@ static void cxl_pci_unmap_regblock(struct cxl_mem *cxlm, void __iomem *base)
 
 static int cxl_pci_dvsec(struct pci_dev *pdev, int dvsec)
 {
-	int pos;
-
-	pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_DVSEC);
-	if (!pos)
-		return 0;
-
-	while (pos) {
-		u16 vendor, id;
-
-		pci_read_config_word(pdev, pos + PCI_DVSEC_HEADER1, &vendor);
-		pci_read_config_word(pdev, pos + PCI_DVSEC_HEADER2, &id);
-		if (vendor == PCI_DVSEC_VENDOR_ID_CXL && dvsec == id)
-			return pos;
-
-		pos = pci_find_next_ext_capability(pdev, pos,
-						   PCI_EXT_CAP_ID_DVSEC);
-	}
-
-	return 0;
+	return pci_find_dvsec_capability(pdev, PCI_DVSEC_VENDOR_ID_CXL, dvsec);
 }
 
 static int cxl_probe_regs(struct cxl_mem *cxlm, void __iomem *base,
-- 
2.33.0