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Message-ID: <20080605030728.GA11528@ldl.fc.hp.com>
Date: Wed, 4 Jun 2008 21:07:28 -0600
From: Alex Chiang <achiang@...com>
To: Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
Cc: jbarnes@...tuousgeek.org,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Matthew Wilcox <matthew@....cx>,
Andrew Morton <akpm@...ux-foundation.org>,
kristen.c.accardi@...el.com, greg@...ah.com, lenb@...nel.org,
pbadari@...ibm.com, linux-pci@...r.kernel.org,
pcihpd-discuss@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4, v14] PCI, ACPI: Physical PCI slot objects
Hi Kenji-san,
* Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>:
>
> I tried to test your patch using latest linux-next, but I could
> not apply your patch with the following messages:
Sorry, that latest patch series was against Linus' tree, not
linux-next.
> I think maybe your patch is conflicting with the following patch.
>
> commit 372fa8fa0a77c47c7bcfae0ccd14e0c5f97d17fe
> Author: Kay Sievers <kay.sievers@...y.org>
> Date: Fri May 2 06:02:41 2008 +0200
>
> driver-core: prepare for removal of 20 char limit from struct device
>
> The access of struct device->bus_id is replaced by dev_name(), to
> be able to use the non-limited kobject name after the conversion
> of the device register callers.
Yes, thanks for pointing this out. I've fixed patch 1/4.
I verified that patches 2, 3 and 4 apply cleanly against
linux-next, so this should be the only fix you'll need.
Sorry for the confusion.
/ac
commit c0175afea14cdaff3c33d894eb474eed1dcfa65d
Author: Alex Chiang <achiang@...com>
Date: Wed Jun 4 21:04:46 2008 -0600
Construct one fakephp slot per PCI slot
Register one slot per slot, rather than one slot per function. Change the
name of the slot to fake%d instead of the pci address.
Signed-off-by: Alex Chiang <achiang@...com>
Signed-off-by: Matthew Wilcox <matthew@....cx>
Cc: Greg KH <greg@...ah.com>
Cc: Kristen Carlson Accardi <kristen.c.accardi@...el.com>
Cc: Len Brown <lenb@...nel.org>
Cc: Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
diff --git a/drivers/pci/hotplug/fakephp.c b/drivers/pci/hotplug/fakephp.c
index d3393f4..e066959 100644
--- a/drivers/pci/hotplug/fakephp.c
+++ b/drivers/pci/hotplug/fakephp.c
@@ -66,6 +66,7 @@ struct dummy_slot {
struct pci_dev *dev;
struct work_struct remove_work;
unsigned long removed;
+ char name[8];
};
static int debug;
@@ -101,6 +102,7 @@ static int add_slot(struct pci_dev *dev)
struct dummy_slot *dslot;
struct hotplug_slot *slot;
int retval = -ENOMEM;
+ static int count = 1;
slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
if (!slot)
@@ -114,15 +116,13 @@ static int add_slot(struct pci_dev *dev)
slot->info->max_bus_speed = PCI_SPEED_UNKNOWN;
slot->info->cur_bus_speed = PCI_SPEED_UNKNOWN;
- slot->name = kstrdup(dev_name(&dev->dev), GFP_KERNEL);
- if (!slot->name)
- goto error_info;
- dbg("slot->name = %s\n", slot->name);
-
dslot = kzalloc(sizeof(struct dummy_slot), GFP_KERNEL);
if (!dslot)
- goto error_name;
+ goto error_info;
+ slot->name = dslot->name;
+ snprintf(slot->name, sizeof(dslot->name), "fake%d", count++);
+ dbg("slot->name = %s\n", slot->name);
slot->ops = &dummy_hotplug_slot_ops;
slot->release = &dummy_release;
slot->private = dslot;
@@ -140,8 +140,6 @@ static int add_slot(struct pci_dev *dev)
error_dslot:
kfree(dslot);
-error_name:
- kfree(slot->name);
error_info:
kfree(slot->info);
error_slot:
@@ -153,17 +151,17 @@ error:
static int __init pci_scan_buses(void)
{
struct pci_dev *dev = NULL;
- int retval = 0;
+ int lastslot = 0;
while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
- retval = add_slot(dev);
- if (retval) {
- pci_dev_put(dev);
- break;
- }
+ if (PCI_FUNC(dev->devfn) > 0 &&
+ lastslot == PCI_SLOT(dev->devfn))
+ continue;
+ lastslot = PCI_SLOT(dev->devfn);
+ add_slot(dev);
}
- return retval;
+ return 0;
}
static void remove_slot(struct dummy_slot *dslot)
@@ -301,23 +299,9 @@ static int enable_slot(struct hotplug_slot *hotplug_slot)
return 0;
}
-/* find the hotplug_slot for the pci_dev */
-static struct hotplug_slot *get_slot_from_dev(struct pci_dev *dev)
-{
- struct dummy_slot *dslot;
-
- list_for_each_entry(dslot, &slot_list, node) {
- if (dslot->dev == dev)
- return dslot->slot;
- }
- return NULL;
-}
-
-
static int disable_slot(struct hotplug_slot *slot)
{
struct dummy_slot *dslot;
- struct hotplug_slot *hslot;
struct pci_dev *dev;
int func;
@@ -327,41 +311,27 @@ static int disable_slot(struct hotplug_slot *slot)
dbg("%s - physical_slot = %s\n", __func__, slot->name);
- /* don't disable bridged devices just yet, we can't handle them easily... */
- if (dslot->dev->subordinate) {
- err("Can't remove PCI devices with other PCI devices behind it yet.\n");
- return -ENODEV;
- }
- if (test_and_set_bit(0, &dslot->removed)) {
- dbg("Slot already scheduled for removal\n");
- return -ENODEV;
- }
- /* search for subfunctions and disable them first */
- if (!(dslot->dev->devfn & 7)) {
- for (func = 1; func < 8; func++) {
- dev = pci_get_slot(dslot->dev->bus,
- dslot->dev->devfn + func);
- if (dev) {
- hslot = get_slot_from_dev(dev);
- if (hslot)
- disable_slot(hslot);
- else {
- err("Hotplug slot not found for subfunction of PCI device\n");
- return -ENODEV;
- }
- pci_dev_put(dev);
- } else
- dbg("No device in slot found\n");
+ for (func = 7; func >= 0; func--) {
+ dev = pci_get_slot(dslot->dev->bus, dslot->dev->devfn + func);
+ if (!dev)
+ continue;
+
+ if (test_and_set_bit(0, &dslot->removed)) {
+ dbg("Slot already scheduled for removal\n");
+ return -ENODEV;
}
- }
- /* remove the device from the pci core */
- pci_remove_bus_device(dslot->dev);
+ /* queue work item to blow away this sysfs entry and other
+ * parts.
+ */
+ INIT_WORK(&dslot->remove_work, remove_slot_worker);
+ queue_work(dummyphp_wq, &dslot->remove_work);
- /* queue work item to blow away this sysfs entry and other parts. */
- INIT_WORK(&dslot->remove_work, remove_slot_worker);
- queue_work(dummyphp_wq, &dslot->remove_work);
+ /* blow away this sysfs entry and other parts. */
+ remove_slot(dslot);
+ pci_dev_put(dev);
+ }
return 0;
}
--
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