[PATCH 02/10] PCI: Use FIELD_GET() in Sapphire RX 5600 XT Pulse quirk

Bjorn Helgaas
2023-10-10T20:44:54Z

From: Bjorn Helgaas <bhelgaas@google.com>

Use FIELD_GET() to remove dependences on the field position, i.e., the
shift value. No functional change intended.

Separate because this isn't as trivial as the other FIELD_GET() changes.

See 907830b0fc9e ("PCI: Add a REBAR size quirk for Sapphire RX 5600 XT
Pulse")

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Nirmoy Das <nirmoy.das@amd.com>
---
drivers/pci/pci.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 848c9ee65d7f..5dc6e7cdfb71 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3751,14 +3751,14 @@ u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar)
return 0;

pci_read_config_dword(pdev, pos + PCI_REBAR_CAP, &cap);
- cap &= PCI_REBAR_CAP_SIZES;
+ cap = FIELD_GET(PCI_REBAR_CAP_SIZES, cap);

/* Sapphire RX 5600 XT Pulse has an invalid cap dword for BAR 0 */
if (pdev->vendor == PCI_VENDOR_ID_ATI && pdev->device == 0x731f &&
- bar == 0 && cap == 0x7000)
- cap = 0x3f000;
+ bar == 0 && cap == 0x700)
+ return 0x3f00;

- return cap >> 4;
+ return cap;
}
EXPORT_SYMBOL(pci_rebar_get_possible_sizes);

--
2.34.1