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| author |   Mathias Nyman <mathias.nyman@linux.intel.com> | 2022-05-12 01:04:48 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-12 18:32:25 +0200 |
| commit | 424140d31ba1c613e7a087caf87723d0273f4dae (patch) | |
| tree | c460a1e293d7b2e581e2e85b6f6af7f747a8bbea /drivers/usb/host/xhci-ring.c | |
| parent | xhci: use generic command timer for stop endpoint commands. (diff) | |
| download | linux-dev-424140d31ba1c613e7a087caf87723d0273f4dae.tar.xz linux-dev-424140d31ba1c613e7a087caf87723d0273f4dae.zip | |
xhci: prevent U2 link power state if Intel tier policy prevented U1
Don't enable U1 or U2 Link powermanagenet (LPM) states for USB3
devices connected to tier 2 or further hubs.
For unknown reasons we previously only prevented U1.
Be consistent, and prevent both U1/U2 states if tier policy doesn't
allow LPM.
Also check the tier policy a bit earlier, and return if U1/U2 is
not allowed. This avoids unnecessary xhci MEL commands.
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20220511220450.85367-8-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
0 files changed, 0 insertions, 0 deletions