diff options
| author | Bjorn Helgaas <bhelgaas@google.com> | 2013-02-12 13:42:36 -0700 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-02-12 13:42:36 -0700 |
| commit | 20f24208f631141bafe57ce5bcc8f2e7f3c41aae (patch) | |
| tree | 6220d9be56bb9e8dd1154f34905671fbf06d35b1 | |
| parent | f2dfcde4ccd101fa3ba8f6c27273a0e359ea9c9c (diff) | |
| parent | 82fee4d67ab86d6fe5eb0f9a9e988ca9d654d765 (diff) | |
Merge branch 'pci/konstantin-runtime-pm' into next
* pci/konstantin-runtime-pm:
PCI/PM: Clear state_saved during suspend
PCI: Use atomic_inc_return() rather than atomic_add_return()
PCI: Catch attempts to disable already-disabled devices
PCI: Disable Bus Master unconditionally in pci_device_shutdown()
| -rw-r--r-- | drivers/pci/pci-driver.c | 6 | ||||
| -rw-r--r-- | drivers/pci/pci.c | 7 |
2 files changed, 10 insertions, 3 deletions
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index acdcc3c6ecdd..1fa1e482a999 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -392,7 +392,7 @@ static void pci_device_shutdown(struct device *dev) * Turn off Bus Master bit on the device to tell it to not * continue to do DMA */ - pci_disable_device(pci_dev); + pci_clear_master(pci_dev); } #ifdef CONFIG_PM @@ -628,6 +628,7 @@ static int pci_pm_suspend(struct device *dev) goto Fixup; } + pci_dev->state_saved = false; if (pm->suspend) { pci_power_t prev = pci_dev->current_state; int error; @@ -774,6 +775,7 @@ static int pci_pm_freeze(struct device *dev) return 0; } + pci_dev->state_saved = false; if (pm->freeze) { int error; @@ -862,6 +864,7 @@ static int pci_pm_poweroff(struct device *dev) goto Fixup; } + pci_dev->state_saved = false; if (pm->poweroff) { int error; @@ -987,6 +990,7 @@ static int pci_pm_runtime_suspend(struct device *dev) if (!pm || !pm->runtime_suspend) return -ENOSYS; + pci_dev->state_saved = false; pci_dev->no_d3cold = false; error = pm->runtime_suspend(dev); suspend_report_result(pm->runtime_suspend, error); diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 393cf095a0c4..924e4665bd57 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1168,7 +1168,7 @@ static int pci_enable_device_flags(struct pci_dev *dev, unsigned long flags) dev->current_state = (pmcsr & PCI_PM_CTRL_STATE_MASK); } - if (atomic_add_return(1, &dev->enable_cnt) > 1) + if (atomic_inc_return(&dev->enable_cnt) > 1) return 0; /* already enabled */ /* only skip sriov related */ @@ -1395,7 +1395,10 @@ pci_disable_device(struct pci_dev *dev) if (dr) dr->enabled = 0; - if (atomic_sub_return(1, &dev->enable_cnt) != 0) + dev_WARN_ONCE(&dev->dev, atomic_read(&dev->enable_cnt) <= 0, + "disabling already-disabled device"); + + if (atomic_dec_return(&dev->enable_cnt) != 0) return; do_pci_disable_device(dev); |