fpga: dfl-pci: Use pci_find_vsec_capability() to simplify the code

PCI core add pci_find_vsec_capability() to query VSEC. We can use that
core API to simplify the code.

Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Acked-by: Xu Yilun <yilun.xu@intel.com>
Link: https://lore.kernel.org/r/20230802080726.178194-1-wangxiongfeng2@huawei.com
Signed-off-by: Xu Yilun <yilun.xu@intel.com>

diff --git a/drivers/fpga/dfl-pci.c b/drivers/fpga/dfl-pci.c
index 1bc0437..98b8fd1 100644 (file)
--- a/drivers/fpga/dfl-pci.c
+++ b/drivers/fpga/dfl-pci.c
@@ -156,19 +156,12 @@ static int *cci_pci_create_irq_table(struct pci_dev *pcidev, unsigned int nvec)
 
 static int find_dfls_by_vsec(struct pci_dev *pcidev, struct dfl_fpga_enum_info *info)
 {
-       u32 bir, offset, vndr_hdr, dfl_cnt, dfl_res;
-       int dfl_res_off, i, bars, voff = 0;
+       u32 bir, offset, dfl_cnt, dfl_res;
+       int dfl_res_off, i, bars, voff;
        resource_size_t start, len;
 
-       while ((voff = pci_find_next_ext_capability(pcidev, voff, PCI_EXT_CAP_ID_VNDR))) {
-               vndr_hdr = 0;
-               pci_read_config_dword(pcidev, voff + PCI_VNDR_HEADER, &vndr_hdr);
-
-               if (PCI_VNDR_HEADER_ID(vndr_hdr) == PCI_VSEC_ID_INTEL_DFLS &&
-                   pcidev->vendor == PCI_VENDOR_ID_INTEL)
-                       break;
-       }
-
+       voff = pci_find_vsec_capability(pcidev, PCI_VENDOR_ID_INTEL,
+                                       PCI_VSEC_ID_INTEL_DFLS);
        if (!voff) {
                dev_dbg(&pcidev->dev, "%s no DFL VSEC found\n", __func__);
                return -ENODEV;