* [PATCH v3 13/51] PCI: Separate realloc list checking after allocation [not found] <1438039809-24957-1-git-send-email-yinghai@kernel.org> @ 2015-07-27 23:29 ` Yinghai Lu 2015-08-17 23:54 ` Bjorn Helgaas 0 siblings, 1 reply; 3+ messages in thread From: Yinghai Lu @ 2015-07-27 23:29 UTC (permalink / raw) To: Bjorn Helgaas, David Miller, Benjamin Herrenschmidt, Wei Yang, TJ, Yijing Wang Cc: Andrew Morton, linux-pci, linux-kernel, Yinghai Lu, Rafael J. Wysocki, Len Brown, linux-acpi We check the realloc list, as list must be empty after allocation. Separate the realloc list checking to another function. Add checking that is missed in acpiphp driver. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Len Brown <lenb@kernel.org> Cc: linux-acpi@vger.kernel.org --- drivers/pci/hotplug/acpiphp_glue.c | 1 + drivers/pci/pci.h | 1 + drivers/pci/setup-bus.c | 11 ++++++++--- 3 files changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index ff53856..134caee 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -507,6 +507,7 @@ static void enable_slot(struct acpiphp_slot *slot) } } __pci_bus_assign_resources(bus, &add_list, NULL); + __pci_bus_check_realloc(&add_list); acpiphp_sanitize_bus(bus); pcie_bus_configure_settings(bus); diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 4ff0ff1..2b83977 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -235,6 +235,7 @@ void __pci_bus_size_bridges(struct pci_bus *bus, void __pci_bus_assign_resources(const struct pci_bus *bus, struct list_head *realloc_head, struct list_head *fail_head); +void __pci_bus_check_realloc(struct list_head *realloc_head); bool pci_bus_clip_resource(struct pci_dev *dev, int idx); void pci_reassigndev_resource_alignment(struct pci_dev *dev); diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 06664db..f30225c 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -350,6 +350,11 @@ out: } } +void __pci_bus_check_realloc(struct list_head *realloc_head) +{ + BUG_ON(!list_empty(realloc_head)); +} + /** * assign_requested_resources_sorted() - satisfy resource requests * @@ -1861,7 +1866,7 @@ again: /* Depth last, allocate resources and update the hardware. */ __pci_bus_assign_resources(bus, add_list, &fail_head); if (add_list) - BUG_ON(!list_empty(add_list)); + __pci_bus_check_realloc(add_list); tried_times++; /* any device complain? */ @@ -1936,7 +1941,7 @@ void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge) again: __pci_bus_size_bridges(parent, &add_list); __pci_bridge_assign_resources(bridge, &add_list, &fail_head); - BUG_ON(!list_empty(&add_list)); + __pci_bus_check_realloc(&add_list); tried_times++; if (list_empty(&fail_head)) @@ -1995,6 +2000,6 @@ void pci_assign_unassigned_bus_resources(struct pci_bus *bus) &add_list); up_read(&pci_bus_sem); __pci_bus_assign_resources(bus, &add_list, NULL); - BUG_ON(!list_empty(&add_list)); + __pci_bus_check_realloc(&add_list); } EXPORT_SYMBOL_GPL(pci_assign_unassigned_bus_resources); -- 1.8.4.5 ^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v3 13/51] PCI: Separate realloc list checking after allocation 2015-07-27 23:29 ` [PATCH v3 13/51] PCI: Separate realloc list checking after allocation Yinghai Lu @ 2015-08-17 23:54 ` Bjorn Helgaas 2015-08-18 21:58 ` Yinghai Lu 0 siblings, 1 reply; 3+ messages in thread From: Bjorn Helgaas @ 2015-08-17 23:54 UTC (permalink / raw) To: Yinghai Lu Cc: David Miller, Benjamin Herrenschmidt, Wei Yang, TJ, Yijing Wang, Andrew Morton, linux-pci, linux-kernel, Rafael J. Wysocki, Len Brown, linux-acpi On Mon, Jul 27, 2015 at 04:29:31PM -0700, Yinghai Lu wrote: > We check the realloc list, as list must be empty after allocation. > > Separate the realloc list checking to another function. > > Add checking that is missed in acpiphp driver. > > Signed-off-by: Yinghai Lu <yinghai@kernel.org> > Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> > Cc: Len Brown <lenb@kernel.org> > Cc: linux-acpi@vger.kernel.org > --- > drivers/pci/hotplug/acpiphp_glue.c | 1 + > drivers/pci/pci.h | 1 + > drivers/pci/setup-bus.c | 11 ++++++++--- > 3 files changed, 10 insertions(+), 3 deletions(-) > > diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c > index ff53856..134caee 100644 > --- a/drivers/pci/hotplug/acpiphp_glue.c > +++ b/drivers/pci/hotplug/acpiphp_glue.c > @@ -507,6 +507,7 @@ static void enable_slot(struct acpiphp_slot *slot) > } > } > __pci_bus_assign_resources(bus, &add_list, NULL); > + __pci_bus_check_realloc(&add_list); > > acpiphp_sanitize_bus(bus); > pcie_bus_configure_settings(bus); > diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h > index 4ff0ff1..2b83977 100644 > --- a/drivers/pci/pci.h > +++ b/drivers/pci/pci.h > @@ -235,6 +235,7 @@ void __pci_bus_size_bridges(struct pci_bus *bus, > void __pci_bus_assign_resources(const struct pci_bus *bus, > struct list_head *realloc_head, > struct list_head *fail_head); > +void __pci_bus_check_realloc(struct list_head *realloc_head); > bool pci_bus_clip_resource(struct pci_dev *dev, int idx); > > void pci_reassigndev_resource_alignment(struct pci_dev *dev); > diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c > index 06664db..f30225c 100644 > --- a/drivers/pci/setup-bus.c > +++ b/drivers/pci/setup-bus.c > @@ -350,6 +350,11 @@ out: > } > } > > +void __pci_bus_check_realloc(struct list_head *realloc_head) > +{ > + BUG_ON(!list_empty(realloc_head)); I don't think this really improves readability. At least before, we could see what we were looking for and we knew it might BUG(). > +} > + > /** > * assign_requested_resources_sorted() - satisfy resource requests > * > @@ -1861,7 +1866,7 @@ again: > /* Depth last, allocate resources and update the hardware. */ > __pci_bus_assign_resources(bus, add_list, &fail_head); > if (add_list) > - BUG_ON(!list_empty(add_list)); > + __pci_bus_check_realloc(add_list); > tried_times++; > > /* any device complain? */ > @@ -1936,7 +1941,7 @@ void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge) > again: > __pci_bus_size_bridges(parent, &add_list); > __pci_bridge_assign_resources(bridge, &add_list, &fail_head); > - BUG_ON(!list_empty(&add_list)); > + __pci_bus_check_realloc(&add_list); > tried_times++; > > if (list_empty(&fail_head)) > @@ -1995,6 +2000,6 @@ void pci_assign_unassigned_bus_resources(struct pci_bus *bus) > &add_list); > up_read(&pci_bus_sem); > __pci_bus_assign_resources(bus, &add_list, NULL); > - BUG_ON(!list_empty(&add_list)); > + __pci_bus_check_realloc(&add_list); > } > EXPORT_SYMBOL_GPL(pci_assign_unassigned_bus_resources); > -- > 1.8.4.5 > ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v3 13/51] PCI: Separate realloc list checking after allocation 2015-08-17 23:54 ` Bjorn Helgaas @ 2015-08-18 21:58 ` Yinghai Lu 0 siblings, 0 replies; 3+ messages in thread From: Yinghai Lu @ 2015-08-18 21:58 UTC (permalink / raw) To: Bjorn Helgaas Cc: David Miller, Benjamin Herrenschmidt, Wei Yang, TJ, Yijing Wang, Andrew Morton, linux-pci@vger.kernel.org, Linux Kernel Mailing List, Rafael J. Wysocki, Len Brown, ACPI Devel Maling List On Mon, Aug 17, 2015 at 4:54 PM, Bjorn Helgaas <bhelgaas@google.com> wrote: > On Mon, Jul 27, 2015 at 04:29:31PM -0700, Yinghai Lu wrote: >> We check the realloc list, as list must be empty after allocation. >> >> Separate the realloc list checking to another function. >> >> Add checking that is missed in acpiphp driver. >> >> Signed-off-by: Yinghai Lu <yinghai@kernel.org> >> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> >> Cc: Len Brown <lenb@kernel.org> >> Cc: linux-acpi@vger.kernel.org >> --- >> drivers/pci/hotplug/acpiphp_glue.c | 1 + >> drivers/pci/pci.h | 1 + >> drivers/pci/setup-bus.c | 11 ++++++++--- >> 3 files changed, 10 insertions(+), 3 deletions(-) >> >> diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c >> index ff53856..134caee 100644 >> --- a/drivers/pci/hotplug/acpiphp_glue.c >> +++ b/drivers/pci/hotplug/acpiphp_glue.c >> @@ -507,6 +507,7 @@ static void enable_slot(struct acpiphp_slot *slot) >> } >> } >> __pci_bus_assign_resources(bus, &add_list, NULL); >> + __pci_bus_check_realloc(&add_list); >> >> acpiphp_sanitize_bus(bus); >> pcie_bus_configure_settings(bus); >> diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h >> index 4ff0ff1..2b83977 100644 >> --- a/drivers/pci/pci.h >> +++ b/drivers/pci/pci.h >> @@ -235,6 +235,7 @@ void __pci_bus_size_bridges(struct pci_bus *bus, >> void __pci_bus_assign_resources(const struct pci_bus *bus, >> struct list_head *realloc_head, >> struct list_head *fail_head); >> +void __pci_bus_check_realloc(struct list_head *realloc_head); >> bool pci_bus_clip_resource(struct pci_dev *dev, int idx); >> >> void pci_reassigndev_resource_alignment(struct pci_dev *dev); >> diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c >> index 06664db..f30225c 100644 >> --- a/drivers/pci/setup-bus.c >> +++ b/drivers/pci/setup-bus.c >> @@ -350,6 +350,11 @@ out: >> } >> } >> >> +void __pci_bus_check_realloc(struct list_head *realloc_head) >> +{ >> + BUG_ON(!list_empty(realloc_head)); > > I don't think this really improves readability. At least before, we could > see what we were looking for and we knew it might BUG(). ok, will only missing BUG_ON into acpiphp_glue.c. ^ permalink raw reply [flat|nested] 3+ messages in thread
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2015-07-27 23:29 ` [PATCH v3 13/51] PCI: Separate realloc list checking after allocation Yinghai Lu
2015-08-17 23:54 ` Bjorn Helgaas
2015-08-18 21:58 ` Yinghai Lu
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