diff options
| author | Juergen Gross <jgross@suse.com> | 2016-09-22 10:45:39 +0200 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2016-09-30 12:48:33 +0200 |
| commit | 1af916b701db1a9905e559e742f45818eb233d12 (patch) | |
| tree | 03ee3cfec7d54701da6ec6af1d022d54bea03bbc /drivers/xen | |
| parent | xen: Remove event channel notification through Xen PCI platform device (diff) | |
| download | linux-1af916b701db1a9905e559e742f45818eb233d12.tar.xz linux-1af916b701db1a9905e559e742f45818eb233d12.zip | |
xen/pciback: simplify pcistub device handling
The Xen pciback driver maintains a list of all its seized devices.
There are two functions searching the list for a specific device with
basically the same semantics just returning different structures in
case of a match.
Split out the search function.
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/xen-pciback/pci_stub.c | 42 |
1 files changed, 21 insertions, 21 deletions
diff --git a/drivers/xen/xen-pciback/pci_stub.c b/drivers/xen/xen-pciback/pci_stub.c index 258b7c325649..79a9e4d66819 100644 --- a/drivers/xen/xen-pciback/pci_stub.c +++ b/drivers/xen/xen-pciback/pci_stub.c @@ -149,13 +149,10 @@ static inline void pcistub_device_put(struct pcistub_device *psdev) kref_put(&psdev->kref, pcistub_device_release); } -static struct pcistub_device *pcistub_device_find(int domain, int bus, - int slot, int func) +static struct pcistub_device *pcistub_device_find_locked(int domain, int bus, + int slot, int func) { - struct pcistub_device *psdev = NULL; - unsigned long flags; - - spin_lock_irqsave(&pcistub_devices_lock, flags); + struct pcistub_device *psdev; list_for_each_entry(psdev, &pcistub_devices, dev_list) { if (psdev->dev != NULL @@ -163,15 +160,25 @@ static struct pcistub_device *pcistub_device_find(int domain, int bus, && bus == psdev->dev->bus->number && slot == PCI_SLOT(psdev->dev->devfn) && func == PCI_FUNC(psdev->dev->devfn)) { - pcistub_device_get(psdev); - goto out; + return psdev; } } - /* didn't find it */ - psdev = NULL; + return NULL; +} + +static struct pcistub_device *pcistub_device_find(int domain, int bus, + int slot, int func) +{ + struct pcistub_device *psdev; + unsigned long flags; + + spin_lock_irqsave(&pcistub_devices_lock, flags); + + psdev = pcistub_device_find_locked(domain, bus, slot, func); + if (psdev) + pcistub_device_get(psdev); -out: spin_unlock_irqrestore(&pcistub_devices_lock, flags); return psdev; } @@ -207,16 +214,9 @@ struct pci_dev *pcistub_get_pci_dev_by_slot(struct xen_pcibk_device *pdev, spin_lock_irqsave(&pcistub_devices_lock, flags); - list_for_each_entry(psdev, &pcistub_devices, dev_list) { - if (psdev->dev != NULL - && domain == pci_domain_nr(psdev->dev->bus) - && bus == psdev->dev->bus->number - && slot == PCI_SLOT(psdev->dev->devfn) - && func == PCI_FUNC(psdev->dev->devfn)) { - found_dev = pcistub_device_get_pci_dev(pdev, psdev); - break; - } - } + psdev = pcistub_device_find_locked(domain, bus, slot, func); + if (psdev) + found_dev = pcistub_device_get_pci_dev(pdev, psdev); spin_unlock_irqrestore(&pcistub_devices_lock, flags); return found_dev; |