From e09b41010ba33a20a87472ee821fa407a5b8da36 Mon Sep 17 00:00:00 2001 From: José Pekkarinen Date: Mon, 11 Apr 2016 10:41:07 +0300 Subject: These changes are the raw update to linux-4.4.6-rt14. Kernel sources are taken from kernel.org, and rt patch from the rt wiki download page. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen --- kernel/drivers/pci/pci-driver.c | 66 ++++++++++++++++++++++++++++++----------- 1 file changed, 49 insertions(+), 17 deletions(-) (limited to 'kernel/drivers/pci/pci-driver.c') diff --git a/kernel/drivers/pci/pci-driver.c b/kernel/drivers/pci/pci-driver.c index 3cb2210de..d7ffd6681 100644 --- a/kernel/drivers/pci/pci-driver.c +++ b/kernel/drivers/pci/pci-driver.c @@ -172,7 +172,7 @@ static ssize_t store_remove_id(struct device_driver *driver, const char *buf, __u32 vendor, device, subvendor = PCI_ANY_ID, subdevice = PCI_ANY_ID, class = 0, class_mask = 0; int fields = 0; - int retval = -ENODEV; + size_t retval = -ENODEV; fields = sscanf(buf, "%x %x %x %x %x %x", &vendor, &device, &subvendor, &subdevice, @@ -190,15 +190,13 @@ static ssize_t store_remove_id(struct device_driver *driver, const char *buf, !((id->class ^ class) & class_mask)) { list_del(&dynid->node); kfree(dynid); - retval = 0; + retval = count; break; } } spin_unlock(&pdrv->dynids.lock); - if (retval) - return retval; - return count; + return retval; } static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id); @@ -299,9 +297,10 @@ static long local_pci_probe(void *_ddi) * Unbound PCI devices are always put in D0, regardless of * runtime PM status. During probe, the device is set to * active and the usage count is incremented. If the driver - * supports runtime PM, it should call pm_runtime_put_noidle() - * in its probe routine and pm_runtime_get_noresume() in its - * remove routine. + * supports runtime PM, it should call pm_runtime_put_noidle(), + * or any other runtime PM helper function decrementing the usage + * count, in its probe routine and pm_runtime_get_noresume() in + * its remove routine. */ pm_runtime_get_sync(dev); pci_dev->driver = pci_drv; @@ -388,18 +387,31 @@ static int __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev) return error; } +int __weak pcibios_alloc_irq(struct pci_dev *dev) +{ + return 0; +} + +void __weak pcibios_free_irq(struct pci_dev *dev) +{ +} + static int pci_device_probe(struct device *dev) { - int error = 0; - struct pci_driver *drv; - struct pci_dev *pci_dev; + int error; + struct pci_dev *pci_dev = to_pci_dev(dev); + struct pci_driver *drv = to_pci_driver(dev->driver); + + error = pcibios_alloc_irq(pci_dev); + if (error < 0) + return error; - drv = to_pci_driver(dev->driver); - pci_dev = to_pci_dev(dev); pci_dev_get(pci_dev); error = __pci_device_probe(drv, pci_dev); - if (error) + if (error) { + pcibios_free_irq(pci_dev); pci_dev_put(pci_dev); + } return error; } @@ -415,6 +427,7 @@ static int pci_device_remove(struct device *dev) drv->remove(pci_dev); pm_runtime_put_noidle(dev); } + pcibios_free_irq(pci_dev); pci_dev->driver = NULL; } @@ -453,7 +466,7 @@ static void pci_device_shutdown(struct device *dev) pci_msi_shutdown(pci_dev); pci_msix_shutdown(pci_dev); -#ifdef CONFIG_KEXEC +#ifdef CONFIG_KEXEC_CORE /* * If this is a kexec reboot, turn off Bus Master bit on the * device to tell it to not continue to do DMA. Don't touch @@ -669,10 +682,16 @@ static int pci_pm_prepare(struct device *dev) return pci_dev_keep_suspended(to_pci_dev(dev)); } +static void pci_pm_complete(struct device *dev) +{ + pci_dev_complete_resume(to_pci_dev(dev)); + pm_complete_with_resume_check(dev); +} #else /* !CONFIG_PM_SLEEP */ #define pci_pm_prepare NULL +#define pci_pm_complete NULL #endif /* !CONFIG_PM_SLEEP */ @@ -1127,9 +1146,21 @@ static int pci_pm_runtime_suspend(struct device *dev) pci_dev->state_saved = false; pci_dev->no_d3cold = false; error = pm->runtime_suspend(dev); - suspend_report_result(pm->runtime_suspend, error); - if (error) + if (error) { + /* + * -EBUSY and -EAGAIN is used to request the runtime PM core + * to schedule a new suspend, so log the event only with debug + * log level. + */ + if (error == -EBUSY || error == -EAGAIN) + dev_dbg(dev, "can't suspend now (%pf returned %d)\n", + pm->runtime_suspend, error); + else + dev_err(dev, "can't suspend (%pf returned %d)\n", + pm->runtime_suspend, error); + return error; + } if (!pci_dev->d3cold_allowed) pci_dev->no_d3cold = true; @@ -1203,6 +1234,7 @@ static int pci_pm_runtime_idle(struct device *dev) static const struct dev_pm_ops pci_dev_pm_ops = { .prepare = pci_pm_prepare, + .complete = pci_pm_complete, .suspend = pci_pm_suspend, .resume = pci_pm_resume, .freeze = pci_pm_freeze, -- cgit 1.2.3-korg