From: Ilpo Järvinen Date: Tue, 2 Jan 2024 17:27:00 +0000 (+0200) Subject: PCI: Fix 64GT/s effective data rate calculation X-Git-Tag: v6.8-rc1~63^2~21^2 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ac4f1897fa5433a1b07a625503a91b6aa9d7e643;p=thirdparty%2Fkernel%2Flinux.git PCI: Fix 64GT/s effective data rate calculation 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 Signed-off-by: Bjorn Helgaas --- diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 5ecbcf0411793..d9132029d6584 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -272,7 +272,7 @@ 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 : \