| Message ID | 1371141152-9468-2-git-send-email-jiang.liu@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Friday, June 14, 2013 12:32:24 AM Jiang Liu wrote: > Changeset "3b63aaa70e1 PCI: acpiphp: Do not use ACPI PCI subdriver > mechanism" causes a regression which breaks ACPI dock support, > please refer to https://bugzilla.kernel.org/show_bug.cgi?id=59501 > > The root cause is that changeset 3b63aaa70e1 changed the relative > initialization order of ACPI dock subsystem and acpiphp driver, > and acpiphp driver has dependency on ACPI dock subsystem's > initialization result, so that acpiphp can't correctly detect ACPI > dock stations now. > > On the other hand, ACPI dock is a built-in driver, so we could > explicitly initialize it before the acpiphp driver is used. > > Signed-off-by: Jiang Liu <jiang.liu@huawei.com> > Reported-by: Alexander E. Patrakov <patrakov@gmail.com> > Tested-by: Alexander E. Patrakov <patrakov@gmail.com> > Cc: "Rafael J. Wysocki" <rjw@sisk.pl> > Cc: linux-acpi@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > Cc: <stable@vger.kernel.org> # 3.9+ Can you please send the whole series to linux-acpi next time? First, because I believe it should go in through the ACPI tree. Second, because it is kind of useful to have all of the patches in context. Thanks, Rafael > --- > drivers/acpi/dock.c | 7 +------ > drivers/acpi/internal.h | 5 +++++ > drivers/acpi/scan.c | 1 + > 3 files changed, 7 insertions(+), 6 deletions(-) > > diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c > index 4fdea38..02b0563 100644 > --- a/drivers/acpi/dock.c > +++ b/drivers/acpi/dock.c > @@ -1033,7 +1033,7 @@ find_dock_and_bay(acpi_handle handle, u32 lvl, void *context, void **rv) > return AE_OK; > } > > -static int __init dock_init(void) > +int __init acpi_dock_init(void) > { > if (acpi_disabled) > return 0; > @@ -1062,9 +1062,4 @@ static void __exit dock_exit(void) > dock_remove(dock_station); > } > > -/* > - * Must be called before drivers of devices in dock, otherwise we can't know > - * which devices are in a dock > - */ > -subsys_initcall(dock_init); > module_exit(dock_exit); > diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h > index 297cbf4..c610a76 100644 > --- a/drivers/acpi/internal.h > +++ b/drivers/acpi/internal.h > @@ -40,6 +40,11 @@ void acpi_container_init(void); > #else > static inline void acpi_container_init(void) {} > #endif > +#ifdef CONFIG_ACPI_DOCK > +void acpi_dock_init(void); > +#else > +static inline void acpi_dock_init(void) {} > +#endif > #ifdef CONFIG_ACPI_HOTPLUG_MEMORY > void acpi_memory_hotplug_init(void); > #else > diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c > index 44225cb..4148163 100644 > --- a/drivers/acpi/scan.c > +++ b/drivers/acpi/scan.c > @@ -2045,6 +2045,7 @@ int __init acpi_scan_init(void) > acpi_lpss_init(); > acpi_container_init(); > acpi_memory_hotplug_init(); > + acpi_dock_init(); > > mutex_lock(&acpi_scan_lock); > /* >
On Friday, June 14, 2013 12:32:24 AM Jiang Liu wrote: > Changeset "3b63aaa70e1 PCI: acpiphp: Do not use ACPI PCI subdriver > mechanism" causes a regression which breaks ACPI dock support, > please refer to https://bugzilla.kernel.org/show_bug.cgi?id=59501 > > The root cause is that changeset 3b63aaa70e1 changed the relative > initialization order of ACPI dock subsystem and acpiphp driver, > and acpiphp driver has dependency on ACPI dock subsystem's > initialization result, so that acpiphp can't correctly detect ACPI > dock stations now. > > On the other hand, ACPI dock is a built-in driver, so we could > explicitly initialize it before the acpiphp driver is used. This change makes sense to me. Thanks, Rafael > Signed-off-by: Jiang Liu <jiang.liu@huawei.com> > Reported-by: Alexander E. Patrakov <patrakov@gmail.com> > Tested-by: Alexander E. Patrakov <patrakov@gmail.com> > Cc: "Rafael J. Wysocki" <rjw@sisk.pl> > Cc: linux-acpi@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > Cc: <stable@vger.kernel.org> # 3.9+ > --- > drivers/acpi/dock.c | 7 +------ > drivers/acpi/internal.h | 5 +++++ > drivers/acpi/scan.c | 1 + > 3 files changed, 7 insertions(+), 6 deletions(-) > > diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c > index 4fdea38..02b0563 100644 > --- a/drivers/acpi/dock.c > +++ b/drivers/acpi/dock.c > @@ -1033,7 +1033,7 @@ find_dock_and_bay(acpi_handle handle, u32 lvl, void *context, void **rv) > return AE_OK; > } > > -static int __init dock_init(void) > +int __init acpi_dock_init(void) > { > if (acpi_disabled) > return 0; > @@ -1062,9 +1062,4 @@ static void __exit dock_exit(void) > dock_remove(dock_station); > } > > -/* > - * Must be called before drivers of devices in dock, otherwise we can't know > - * which devices are in a dock > - */ > -subsys_initcall(dock_init); > module_exit(dock_exit); > diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h > index 297cbf4..c610a76 100644 > --- a/drivers/acpi/internal.h > +++ b/drivers/acpi/internal.h > @@ -40,6 +40,11 @@ void acpi_container_init(void); > #else > static inline void acpi_container_init(void) {} > #endif > +#ifdef CONFIG_ACPI_DOCK > +void acpi_dock_init(void); > +#else > +static inline void acpi_dock_init(void) {} > +#endif > #ifdef CONFIG_ACPI_HOTPLUG_MEMORY > void acpi_memory_hotplug_init(void); > #else > diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c > index 44225cb..4148163 100644 > --- a/drivers/acpi/scan.c > +++ b/drivers/acpi/scan.c > @@ -2045,6 +2045,7 @@ int __init acpi_scan_init(void) > acpi_lpss_init(); > acpi_container_init(); > acpi_memory_hotplug_init(); > + acpi_dock_init(); > > mutex_lock(&acpi_scan_lock); > /* >
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index 4fdea38..02b0563 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -1033,7 +1033,7 @@ find_dock_and_bay(acpi_handle handle, u32 lvl, void *context, void **rv) return AE_OK; } -static int __init dock_init(void) +int __init acpi_dock_init(void) { if (acpi_disabled) return 0; @@ -1062,9 +1062,4 @@ static void __exit dock_exit(void) dock_remove(dock_station); } -/* - * Must be called before drivers of devices in dock, otherwise we can't know - * which devices are in a dock - */ -subsys_initcall(dock_init); module_exit(dock_exit); diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index 297cbf4..c610a76 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -40,6 +40,11 @@ void acpi_container_init(void); #else static inline void acpi_container_init(void) {} #endif +#ifdef CONFIG_ACPI_DOCK +void acpi_dock_init(void); +#else +static inline void acpi_dock_init(void) {} +#endif #ifdef CONFIG_ACPI_HOTPLUG_MEMORY void acpi_memory_hotplug_init(void); #else diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 44225cb..4148163 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -2045,6 +2045,7 @@ int __init acpi_scan_init(void) acpi_lpss_init(); acpi_container_init(); acpi_memory_hotplug_init(); + acpi_dock_init(); mutex_lock(&acpi_scan_lock); /*