d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Give new home to the comment from ppt_pci_reset(), explaining a nuance

Browse Source 
of power reset.

Noted by:	soralx@cydem.org
Sponsored by:	Mellanox Technologies
MFC after:	12 days
This commit is contained in:
Konstantin Belousov 2019-04-07 08:58:09 +00:00
parent bca4681bf8
commit ca19084f36
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
sys/dev/pci/pci.c
View File

@ -6394,6 +6394,11 @@ pcie_flr(device_t dev, u_int max_delay, bool force)
return (true);
}
/*
* Attempt a power-management reset by cycling the device in/out of D3
* state. PCI spec says we can only go into D3 state from D0 state.
* Transition from D[12] into D0 before going to D3 state.
*/
int
pci_power_reset(device_t dev)
{