PCI: Fix 64GT/s effective data rate calculation

[ Upstream commit ac4f1897fa5433a1b07a625503a91b6aa9d7e643 ]

Unlike the lower rates, the PCIe 64GT/s Data Rate uses 1b/1b encoding, not
128b/130b (PCIe r6.1 sec 1.2, Table 1-1).  Correct the PCIE_SPEED2MBS_ENC()
calculation to reflect that.

Link: https://lore.kernel.org/r/20240102172701.65501-1-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 5484048f457d14db055d404473a766f85e9fafeb..99abc4cec0df1320fa273e0bc893d25e3e12c1aa 100644 (file)
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -269,7 +269,7 @@ void pci_bus_put(struct pci_bus *bus);
 
 /* PCIe speed to Mb/s reduced by encoding overhead */
 #define PCIE_SPEED2MBS_ENC(speed) \
-       ((speed) == PCIE_SPEED_64_0GT ? 64000*128/130 : \
+       ((speed) == PCIE_SPEED_64_0GT ? 64000*1/1 : \
         (speed) == PCIE_SPEED_32_0GT ? 32000*128/130 : \
         (speed) == PCIE_SPEED_16_0GT ? 16000*128/130 : \
         (speed) == PCIE_SPEED_8_0GT  ?  8000*128/130 : \