diff mbox

eeepc-laptop: don't touch the pci slot if it was claimed by a different driver

Message ID 4A48C15C.3000509@tuffmail.co.uk (mailing list archive)
State Accepted
Delegated to: Corentin Chary
Headers show

Commit Message

Alan Jenkins June 29, 2009, 1:27 p.m. UTC
The whole point of registering as a PCI hotplug driver was to prevent
conflict with pciehp.  At the moment it happens to work because
eeepc-laptop is loaded first, but it doesn't work the other way round.
If pciehp is loaded first then we fail to claim the slot - we need to
respect this and not handle hotplug events.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
---

IMO this is not an urgent patch - it's not a regression from 2.6.30. 
Given the number of other changes, I'd be happier if it could be held
back for 2.6.32.

 drivers/platform/x86/eeepc-laptop.c |   13 ++++++++-----
 1 files changed, 8 insertions(+), 5 deletions(-)

Comments

Matthew Garrett June 29, 2009, 7:22 p.m. UTC | #1
On Mon, Jun 29, 2009 at 02:27:56PM +0100, Alan Jenkins wrote:
> The whole point of registering as a PCI hotplug driver was to prevent
> conflict with pciehp.  At the moment it happens to work because
> eeepc-laptop is loaded first, but it doesn't work the other way round.
> If pciehp is loaded first then we fail to claim the slot - we need to
> respect this and not handle hotplug events.
> 
> Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Acked-by: Matthew Garrett <mjg59@srcf.ucam.org>
Corentin Chary June 29, 2009, 8:03 p.m. UTC | #2
On Mon, Jun 29, 2009 at 9:22 PM, Matthew Garrett<mjg59@srcf.ucam.org> wrote:
> On Mon, Jun 29, 2009 at 02:27:56PM +0100, Alan Jenkins wrote:
>> The whole point of registering as a PCI hotplug driver was to prevent
>> conflict with pciehp.  At the moment it happens to work because
>> eeepc-laptop is loaded first, but it doesn't work the other way round.
>> If pciehp is loaded first then we fail to claim the slot - we need to
>> respect this and not handle hotplug events.
>>
>> Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
> Acked-by: Matthew Garrett <mjg59@srcf.ucam.org>

> IMO this is not an urgent patch - it's not a regression from 2.6.30.
> Given the number of other changes, I'd be happier if it could be held
> back for 2.6.32.

Merged into ACPI4Asus, while waiting 2.6.32.
Thanks
diff mbox

Patch

diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index 76dc3d9..faedee5 100644
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -664,15 +664,20 @@  static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
 static void eeepc_hotplug_work(struct work_struct *work)
 {
 	struct pci_dev *dev;
-	struct pci_bus *bus = pci_find_bus(0, 1);
-	bool blocked;
+	struct pci_bus *bus;
+	bool blocked = eeepc_wlan_rfkill_blocked();
+
+	rfkill_set_sw_state(ehotk->wlan_rfkill, blocked);
 
+	if (ehotk->hotplug_slot == NULL)
+		return;
+
+	bus = pci_find_bus(0, 1);
 	if (!bus) {
 		pr_warning("Unable to find PCI bus 1?\n");
 		return;
 	}
 
-	blocked = eeepc_wlan_rfkill_blocked();
 	if (!blocked) {
 		dev = pci_get_slot(bus, 0);
 		if (dev) {
@@ -693,8 +698,6 @@  static void eeepc_hotplug_work(struct work_struct *work)
 			pci_dev_put(dev);
 		}
 	}
-
-	rfkill_set_sw_state(ehotk->wlan_rfkill, blocked);
 }
 
 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)