Revert "PCI: create function symlinks in /sys/bus/pci/slots/N/"
Jesse Barnes [Fri, 11 Jun 2010 20:08:37 +0000 (13:08 -0700)]
This reverts commit 75568f8094eb0333e9c2109b23cbc8b82d318a3c.

Since they're just a convenience anyway, remove these symlinks since
they're causing duplicate filename errors in the wild.

Acked-by: Alex Chiang <achiang@canonical.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

Documentation/ABI/testing/sysfs-bus-pci
drivers/pci/pci-sysfs.c
drivers/pci/slot.c

index 428676c..25be325 100644 (file)
@@ -133,46 +133,6 @@ Description:
                The symbolic link points to the PCI device sysfs entry of the
                Physical Function this device associates with.
 
-
-What:          /sys/bus/pci/slots/...
-Date:          April 2005 (possibly older)
-KernelVersion: 2.6.12 (possibly older)
-Contact:       linux-pci@vger.kernel.org
-Description:
-               When the appropriate driver is loaded, it will create a
-               directory per claimed physical PCI slot in
-               /sys/bus/pci/slots/.  The names of these directories are
-               specific to the driver, which in turn, are specific to the
-               platform, but in general, should match the label on the
-               machine's physical chassis.
-
-               The drivers that can create slot directories include the
-               PCI hotplug drivers, and as of 2.6.27, the pci_slot driver.
-
-               The slot directories contain, at a minimum, a file named
-               'address' which contains the PCI bus:device:function tuple.
-               Other files may appear as well, but are specific to the
-               driver.
-
-What:          /sys/bus/pci/slots/.../function[0-7]
-Date:          March 2010
-KernelVersion: 2.6.35
-Contact:       linux-pci@vger.kernel.org
-Description:
-               If PCI slot directories (as described above) are created,
-               and the physical slot is actually populated with a device,
-               symbolic links in the slot directory pointing to the
-               device's PCI functions are created as well.
-
-What:          /sys/bus/pci/devices/.../slot
-Date:          March 2010
-KernelVersion: 2.6.35
-Contact:       linux-pci@vger.kernel.org
-Description:
-               If PCI slot directories (as described above) are created,
-               a symbolic link pointing to the slot directory will be
-               created as well.
-
 What:          /sys/bus/pci/slots/.../module
 Date:          June 2009
 Contact:       linux-pci@vger.kernel.org
index afd2fbf..c9957f6 100644 (file)
@@ -1035,39 +1035,6 @@ error:
        return retval;
 }
 
-static void pci_remove_slot_links(struct pci_dev *dev)
-{
-       char func[10];
-       struct pci_slot *slot;
-
-       sysfs_remove_link(&dev->dev.kobj, "slot");
-       list_for_each_entry(slot, &dev->bus->slots, list) {
-               if (slot->number != PCI_SLOT(dev->devfn))
-                       continue;
-               snprintf(func, 10, "function%d", PCI_FUNC(dev->devfn));
-               sysfs_remove_link(&slot->kobj, func);
-       }
-}
-
-static int pci_create_slot_links(struct pci_dev *dev)
-{
-       int result = 0;
-       char func[10];
-       struct pci_slot *slot;
-
-       list_for_each_entry(slot, &dev->bus->slots, list) {
-               if (slot->number != PCI_SLOT(dev->devfn))
-                       continue;
-               result = sysfs_create_link(&dev->dev.kobj, &slot->kobj, "slot");
-               if (result)
-                       goto out;
-               snprintf(func, 10, "function%d", PCI_FUNC(dev->devfn));
-               result = sysfs_create_link(&slot->kobj, &dev->dev.kobj, func);
-       }
-out:
-       return result;
-}
-
 int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
 {
        int retval;
@@ -1130,8 +1097,6 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
        if (retval)
                goto err_vga_file;
 
-       pci_create_slot_links(pdev);
-
        return 0;
 
 err_vga_file:
@@ -1181,8 +1146,6 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
        if (!sysfs_initialized)
                return;
 
-       pci_remove_slot_links(pdev);
-
        pci_remove_capabilities_sysfs(pdev);
 
        if (pdev->cfg_size < PCI_CFG_SPACE_EXP_SIZE)
index e0189cf..659eaa0 100644 (file)
@@ -97,50 +97,6 @@ static ssize_t cur_speed_read_file(struct pci_slot *slot, char *buf)
        return bus_speed_read(slot->bus->cur_bus_speed, buf);
 }
 
-static void remove_sysfs_files(struct pci_slot *slot)
-{
-       char func[10];
-       struct list_head *tmp;
-
-       list_for_each(tmp, &slot->bus->devices) {
-               struct pci_dev *dev = pci_dev_b(tmp);
-               if (PCI_SLOT(dev->devfn) != slot->number)
-                       continue;
-               sysfs_remove_link(&dev->dev.kobj, "slot");
-
-               snprintf(func, 10, "function%d", PCI_FUNC(dev->devfn));
-               sysfs_remove_link(&slot->kobj, func);
-       }
-}
-
-static int create_sysfs_files(struct pci_slot *slot)
-{
-       int result;
-       char func[10];
-       struct list_head *tmp;
-
-       list_for_each(tmp, &slot->bus->devices) {
-               struct pci_dev *dev = pci_dev_b(tmp);
-               if (PCI_SLOT(dev->devfn) != slot->number)
-                       continue;
-
-               result = sysfs_create_link(&dev->dev.kobj, &slot->kobj, "slot");
-               if (result)
-                       goto fail;
-
-               snprintf(func, 10, "function%d", PCI_FUNC(dev->devfn));
-               result = sysfs_create_link(&slot->kobj, &dev->dev.kobj, func);
-               if (result)
-                       goto fail;
-       }
-
-       return 0;
-
-fail:
-       remove_sysfs_files(slot);
-       return result;
-}
-
 static void pci_slot_release(struct kobject *kobj)
 {
        struct pci_dev *dev;
@@ -153,8 +109,6 @@ static void pci_slot_release(struct kobject *kobj)
                if (PCI_SLOT(dev->devfn) == slot->number)
                        dev->slot = NULL;
 
-       remove_sysfs_files(slot);
-
        list_del(&slot->list);
 
        kfree(slot);
@@ -346,8 +300,6 @@ placeholder:
        INIT_LIST_HEAD(&slot->list);
        list_add(&slot->list, &parent->slots);
 
-       create_sysfs_files(slot);
-
        list_for_each_entry(dev, &parent->devices, bus_list)
                if (PCI_SLOT(dev->devfn) == slot_nr)
                        dev->slot = slot;