Date: Sun, 7 Apr 2019 08:58:09 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r345997 - head/sys/dev/pci Message-ID: <201904070858.x378w9b3095055@repo.freebsd.org>
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Author: kib Date: Sun Apr 7 08:58:09 2019 New Revision: 345997 URL: https://svnweb.freebsd.org/changeset/base/345997 Log: Give new home to the comment from ppt_pci_reset(), explaining a nuance of power reset. Noted by: soralx@cydem.org Sponsored by: Mellanox Technologies MFC after: 12 days Modified: head/sys/dev/pci/pci.c Modified: head/sys/dev/pci/pci.c ============================================================================== --- head/sys/dev/pci/pci.c Sat Apr 6 23:35:23 2019 (r345996) +++ head/sys/dev/pci/pci.c Sun Apr 7 08:58:09 2019 (r345997) @@ -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) {
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