diff options
| author | Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> | 2021-10-01 21:38:40 +0300 |
|---|---|---|
| committer | Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> | 2021-10-01 21:40:21 +0300 |
| commit | 9c881021a269af242594e2dfc79f1c4701404887 (patch) | |
| tree | c8ec14f412d7ea35009b2dee08770082ddbb5c6e /drivers/pci/pci.c | |
| parent | e9479d98b87227b8b7502c4c1e778887b23799f1 (diff) | |
| parent | cf06e1ab1c3ed354da5873e646f2164fea147c88 (diff) | |
| download | linux-dev-5.10-intel.tar.xz | |
Merge branch 'dev-5.10' into dev-5.10-inteldev-5.10-intel
Pull 5.10.67 stable from OpenBMC upstream.
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 32 |
1 files changed, 20 insertions, 12 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 9e971fffeb6a..eae6a9fdd33d 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1880,11 +1880,7 @@ static int pci_enable_device_flags(struct pci_dev *dev, unsigned long flags) * so that things like MSI message writing will behave as expected * (e.g. if the device really is in D0 at enable time). */ - if (dev->pm_cap) { - u16 pmcsr; - pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr); - dev->current_state = (pmcsr & PCI_PM_CTRL_STATE_MASK); - } + pci_update_current_state(dev, dev->current_state); if (atomic_inc_return(&dev->enable_cnt) > 1) return 0; /* already enabled */ @@ -2469,7 +2465,14 @@ static int __pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable if (enable) { int error; - if (pci_pme_capable(dev, state)) + /* + * Enable PME signaling if the device can signal PME from + * D3cold regardless of whether or not it can signal PME from + * the current target state, because that will allow it to + * signal PME when the hierarchy above it goes into D3cold and + * the device itself ends up in D3cold as a result of that. + */ + if (pci_pme_capable(dev, state) || pci_pme_capable(dev, PCI_D3cold)) pci_pme_active(dev, true); else ret = 1; @@ -2573,16 +2576,20 @@ static pci_power_t pci_target_state(struct pci_dev *dev, bool wakeup) if (dev->current_state == PCI_D3cold) target_state = PCI_D3cold; - if (wakeup) { + if (wakeup && dev->pme_support) { + pci_power_t state = target_state; + /* * Find the deepest state from which the device can generate * PME#. */ - if (dev->pme_support) { - while (target_state - && !(dev->pme_support & (1 << target_state))) - target_state--; - } + while (state && !(dev->pme_support & (1 << state))) + state--; + + if (state) + return state; + else if (dev->pme_support & 1) + return PCI_D0; } return target_state; @@ -4032,6 +4039,7 @@ phys_addr_t pci_pio_to_address(unsigned long pio) return address; } +EXPORT_SYMBOL_GPL(pci_pio_to_address); unsigned long __weak pci_address_to_pio(phys_addr_t address) { |