From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
Toshi Kani <toshi.kani@hp.com>,
Bjorn Helgaas <bhelgaas@google.com>,
LKML <linux-kernel@vger.kernel.org>,
linux-pci@vger.kernel.org, Yinghai Lu <yinghai@kernel.org>,
Myron Stowe <myron.stowe@redhat.com>,
Yijing Wang <wangyijing0307@gmail.com>,
Jiang Liu <liuj97@gmail.com>
Subject: Re: [PATCH 1/16] ACPI: Separate adding ACPI device objects from probing ACPI drivers
Date: Fri, 11 Jan 2013 21:31:43 +0100 [thread overview]
Message-ID: <2859994.arbXorpfaz@vostro.rjw.lan> (raw)
In-Reply-To: <20130111200046.GB13897@intel.com>
On Friday, January 11, 2013 10:00:46 PM Mika Westerberg wrote:
> (Sorry to jump in late but I noticed one problem with this series while
> testing).
>
> On Thu, Dec 20, 2012 at 02:47:47AM +0100, Rafael J. Wysocki wrote:
> > +static acpi_status acpi_bus_probe_start(acpi_handle handle, u32 lvl,
> > + void *context, void **not_used)
> > +{
> > + struct acpi_bus_ops *ops = context;
> > + acpi_status status = AE_OK;
> > + struct acpi_device *device;
> > + unsigned long long sta_not_used;
> > + int type_not_used;
> > +
> > + /*
> > + * Ignore errors ignored by acpi_bus_check_add() to avoid terminating
> > + * namespace walks prematurely.
> > + */
> > + if (acpi_bus_type_and_status(handle, &type_not_used, &sta_not_used))
> > + return AE_OK;
> > +
> > + if (acpi_bus_get_device(handle, &device))
> > + return AE_CTRL_DEPTH;
> > +
> > + if (ops->acpi_op_add) {
> > + if (!acpi_match_device_ids(device, acpi_platform_device_ids)) {
> > + /* This is a known good platform device. */
> > + acpi_create_platform_device(device);
> > + } else if (device_attach(&device->dev)) {
>
> device_attach() returns 1 if it succeeds to attach device to a driver. In
> that case we should continue and not return AE_CTRL_DEPTH, right?
That's correct. The check is reversed, so we need the appended patch on top
of linux-pm.git/acpi-scan.
Thanks,
Rafael
---
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Subject: ACPI / scan: Fix check of device_attach() return value.
Since device_attach() returns 1 on success and 0 on failure,
the check against its return value in acpi_bus_device_attach()
should be reveresed. Make it so.
Reported-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/acpi/scan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux-pm/drivers/acpi/scan.c
===================================================================
--- linux-pm.orig/drivers/acpi/scan.c
+++ linux-pm/drivers/acpi/scan.c
@@ -1598,7 +1598,7 @@ static acpi_status acpi_bus_device_attac
if (!acpi_match_device_ids(device, acpi_platform_device_ids)) {
/* This is a known good platform device. */
acpi_create_platform_device(device);
- } else if (device_attach(&device->dev)) {
+ } else if (!device_attach(&device->dev)) {
status = AE_CTRL_DEPTH;
}
return status;
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
next prev parent reply other threads:[~2013-01-11 20:25 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-09 22:58 [PATCH 0/6] ACPI: Change the ACPI namespace scanning code ordering Rafael J. Wysocki
2012-12-09 23:00 ` [PATCH 1/6] ACPI: Separate adding ACPI device objects from probing ACPI drivers Rafael J. Wysocki
2012-12-12 15:50 ` Jiang Liu
2012-12-12 22:34 ` Rafael J. Wysocki
2012-12-12 16:38 ` Jiang Liu
2012-12-12 22:32 ` Rafael J. Wysocki
2012-12-12 23:43 ` [update][PATCH " Rafael J. Wysocki
2012-12-13 13:05 ` [PATCH " Jiang Liu
2012-12-13 19:40 ` Rafael J. Wysocki
2012-12-13 1:00 ` Bjorn Helgaas
2012-12-13 11:41 ` Rafael J. Wysocki
2012-12-09 23:00 ` [PATCH 2/6] ACPI: Change the ordering of PCI root bridge driver registrarion Rafael J. Wysocki
2012-12-13 1:00 ` Bjorn Helgaas
2012-12-13 12:19 ` Rafael J. Wysocki
2012-12-09 23:01 ` [PATCH 3/6] ACPI: Make acpi_bus_add() and acpi_bus_start() visibly different Rafael J. Wysocki
2012-12-13 0:11 ` [Update][PATCH " Rafael J. Wysocki
2012-12-09 23:02 ` [PATCH 4/6] ACPI: Reduce the usage of struct acpi_bus_ops Rafael J. Wysocki
2012-12-09 23:03 ` [PATCH 5/6] ACPI: Replace struct acpi_bus_ops with enum type Rafael J. Wysocki
2012-12-10 5:34 ` Yinghai Lu
2012-12-10 14:46 ` Rafael J. Wysocki
2012-12-10 17:07 ` Yinghai Lu
2012-12-10 22:47 ` Rafael J. Wysocki
2012-12-10 23:09 ` Rafael J. Wysocki
2012-12-10 23:14 ` Yinghai Lu
2012-12-11 1:02 ` Rafael J. Wysocki
2012-12-11 1:28 ` Rafael J. Wysocki
2012-12-11 2:26 ` Yinghai Lu
2012-12-11 12:45 ` Rafael J. Wysocki
2012-12-11 15:09 ` Jiang Liu
2012-12-11 18:30 ` Rafael J. Wysocki
2012-12-12 14:34 ` Yijing Wang
2012-12-12 15:05 ` Jiang Liu
2012-12-12 22:39 ` Rafael J. Wysocki
2012-12-10 23:22 ` Yinghai Lu
2012-12-11 0:48 ` Rafael J. Wysocki
2012-12-09 23:04 ` [PATCH 6/6] ACPI: Change the ordering of acpi_bus_check_add() Rafael J. Wysocki
2012-12-13 1:00 ` Bjorn Helgaas
2012-12-13 12:20 ` Rafael J. Wysocki
2012-12-13 11:45 ` [PATCH 0/6] ACPI: Change the ACPI namespace scanning code ordering Yijing Wang
2012-12-13 22:15 ` [PATCH rev.2 " Rafael J. Wysocki
2012-12-13 22:17 ` [PATCH rev.2 1/6] ACPI: Separate adding ACPI device objects from probing ACPI drivers Rafael J. Wysocki
2012-12-18 0:08 ` Toshi Kani
2012-12-18 1:48 ` Rafael J. Wysocki
2012-12-18 16:10 ` Toshi Kani
2012-12-18 18:59 ` Yinghai Lu
2012-12-18 20:48 ` Toshi Kani
2012-12-18 21:11 ` Yinghai Lu
2012-12-18 22:05 ` Rafael J. Wysocki
2012-12-19 1:57 ` Yinghai Lu
2012-12-18 21:57 ` Rafael J. Wysocki
2012-12-18 22:15 ` Toshi Kani
2012-12-18 23:00 ` Rafael J. Wysocki
2012-12-18 23:19 ` Bjorn Helgaas
2012-12-19 11:13 ` Rafael J. Wysocki
2012-12-20 1:45 ` [PATCH 0/16] ACPI: Rework ACPI namespace scanning for devices Rafael J. Wysocki
2012-12-20 1:47 ` [PATCH 1/16] ACPI: Separate adding ACPI device objects from probing ACPI drivers Rafael J. Wysocki
2013-01-11 20:00 ` Mika Westerberg
2013-01-11 20:31 ` Rafael J. Wysocki [this message]
2013-01-11 20:37 ` Mika Westerberg
2013-01-11 20:58 ` Rafael J. Wysocki
2013-01-11 20:59 ` Mika Westerberg
2012-12-20 1:48 ` [PATCH 2/16] ACPI: Change the ordering of PCI root bridge driver registrarion Rafael J. Wysocki
2012-12-20 1:49 ` [PATCH 3/16] ACPI: Make acpi_bus_add() and acpi_bus_start() visibly different Rafael J. Wysocki
2012-12-20 1:50 ` [PATCH 4/16] ACPI: Reduce the usage of struct acpi_bus_ops Rafael J. Wysocki
2012-12-20 1:50 ` [PATCH 5/16] ACPI: Replace struct acpi_bus_ops with enum type Rafael J. Wysocki
2012-12-20 1:51 ` [PATCH 6/16] ACPI: Change the ordering of acpi_bus_check_add() Rafael J. Wysocki
2012-12-20 1:52 ` [PATCH 7/16] ACPI / PCI: Fold acpi_pci_root_start() into acpi_pci_root_add() Rafael J. Wysocki
2012-12-20 1:53 ` [PATCH 8/16] ACPI: Remove acpi_start_single_object() and acpi_bus_start() Rafael J. Wysocki
2012-12-20 1:54 ` [PATCH 9/16] ACPI: Remove the arguments of acpi_bus_add() that are not used Rafael J. Wysocki
2012-12-20 1:54 ` [PATCH 10/16] ACPI: Drop the second argument of acpi_bus_scan() Rafael J. Wysocki
2012-12-20 1:55 ` [PATCH 11/16] ACPI: Replace ACPI device add_type field with a match_driver flag Rafael J. Wysocki
2012-12-20 1:56 ` [PATCH 12/16] ACPI: Make acpi_bus_scan() and acpi_bus_add() take only one argument Rafael J. Wysocki
2012-12-20 1:57 ` [PATCH 13/16] ACPI: Add .setup() and .cleanup() callbacks to struct acpi_bus_type Rafael J. Wysocki
2012-12-20 1:58 ` [PATCH 14/16] ACPI / PCI: Rework the setup and cleanup of device wakeup Rafael J. Wysocki
2012-12-20 1:59 ` [PATCH 15/16] ACPI / PCI: Move the _PRT setup and cleanup code to pci-acpi.c Rafael J. Wysocki
2012-12-20 2:06 ` [PATCH 0/16] ACPI: Rework ACPI namespace scanning for devices Yinghai Lu
2012-12-21 0:09 ` Rafael J. Wysocki
2012-12-21 3:59 ` Yinghai Lu
2012-12-21 22:23 ` Rafael J. Wysocki
2012-12-20 21:07 ` Toshi Kani
2012-12-20 23:20 ` Rafael J. Wysocki
2012-12-13 22:18 ` [PATCH rev.2 2/6] ACPI: Change the ordering of PCI root bridge driver registrarion Rafael J. Wysocki
2012-12-13 22:21 ` [PATCH rev.2 3/6] ACPI: Make acpi_bus_add() and acpi_bus_start() visibly different Rafael J. Wysocki
2012-12-13 22:21 ` [PATCH rev.2 4/6] ACPI: Reduce the usage of struct acpi_bus_ops Rafael J. Wysocki
2012-12-13 22:22 ` [PATCH rev.2 5/6] ACPI: Replace struct acpi_bus_ops with enum type Rafael J. Wysocki
2012-12-13 22:23 ` [PATCH rev.2 6/6] ACPI: Change the ordering of acpi_bus_check_add() Rafael J. Wysocki
2012-12-14 9:56 ` [PATCH rev.2 0/6] ACPI: Change the ACPI namespace scanning code ordering Yijing Wang
2012-12-14 22:59 ` Rafael J. Wysocki
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