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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>
This commit is contained in:
Ilpo Järvinen 2024-01-02 19:27:00 +02:00 committed by Greg Kroah-Hartman
parent 521f28eedd
commit 83c895561a
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/pci.h
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@ -274,7 +274,7 @@ 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 : \