diff options
| author | Gustavo Pimentel <Gustavo.Pimentel@synopsys.com> | 2019-06-04 18:24:43 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2019-06-13 16:49:45 -0500 |
| commit | de76cda215d56256ffcda7ffa538b70f9fb301a7 (patch) | |
| tree | 69c7e1015e6799e7bcb8cccbc711949ad4fc3392 /drivers/pci/pci-sysfs.c | |
| parent | 2d2f4273cbe9058d1f5a518e5e880d27d7b3b30f (diff) | |
PCI: Decode PCIe 32 GT/s link speed
PCIe r5.0, sec 7.5.3.18, defines a new 32.0 GT/s bit in the Supported Link
Speeds Vector of Link Capabilities 2. Decode this new speed. This does
not affect the speed of the link, which should be negotiated automatically
by the hardware; it only adds decoding when showing the speed to the user.
Previously, reading the speed of a link operating at this speed showed
"Unknown speed" instead of "32.0 GT/s".
Link: https://lore.kernel.org/lkml/92365e3caf0fc559f9ab14bcd053bfc92d4f661c.1559664969.git.gustavo.pimentel@synopsys.com
Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
[bhelgaas: changelog]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/pci-sysfs.c')
| -rw-r--r-- | drivers/pci/pci-sysfs.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 6d27475e39b2..d52d30448e41 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -182,6 +182,9 @@ static ssize_t current_link_speed_show(struct device *dev, return -EINVAL; switch (linkstat & PCI_EXP_LNKSTA_CLS) { + case PCI_EXP_LNKSTA_CLS_32_0GB: + speed = "32 GT/s"; + break; case PCI_EXP_LNKSTA_CLS_16_0GB: speed = "16 GT/s"; break; |