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Message-ID: <201902042322.W4WIZR8T%fengguang.wu@intel.com>
Date: Mon, 4 Feb 2019 23:27:56 +0800
From: kbuild test robot <lkp@...el.com>
To: Nicholas Johnson <nicholas.johnson-opensource@...look.com.au>
Cc: kbuild-all@...org,
"mika.westerberg@...ux.intel.com" <mika.westerberg@...ux.intel.com>,
Nicholas Johnson <nicholas.johnson-opensource@...look.com.au>,
Bjorn Helgaas <bhelgaas@...gle.com>,
"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] PCI: Consider alignment of hot-added bridges when
distributing available resources
Hi Nicholas,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on pci/next]
[also build test WARNING on v5.0-rc4 next-20190204]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Nicholas-Johnson/PCI-Consider-alignment-of-hot-added-bridges-when-distributing-available-resources/20190204-182638
base: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next
config: i386-randconfig-s0-02041749 (attached as .config)
compiler: gcc-6 (Debian 6.5.0-2) 6.5.0 20181026
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All warnings (new ones prefixed by >>):
In file included from include/linux/pci.h:31:0,
from drivers/pci/setup-bus.c:20:
drivers/pci/setup-bus.c: In function 'extend_bridge_window':
drivers/pci/setup-bus.c:1831:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 5 has type 'resource_size_t {aka unsigned int}' [-Wformat=]
pci_dbg(bridge, "bridge window %pR extended by 0x%016llx\n", res,
^
include/linux/device.h:1380:22: note: in definition of macro 'dev_fmt'
#define dev_fmt(fmt) fmt
^~~
>> include/linux/pci.h:2362:36: note: in expansion of macro 'dev_dbg'
#define pci_dbg(pdev, fmt, arg...) dev_dbg(&(pdev)->dev, fmt, ##arg)
^~~~~~~
>> drivers/pci/setup-bus.c:1831:2: note: in expansion of macro 'pci_dbg'
pci_dbg(bridge, "bridge window %pR extended by 0x%016llx\n", res,
^~~~~~~
Cyclomatic Complexity 5 include/linux/compiler.h:__read_once_size
Cyclomatic Complexity 5 include/linux/compiler.h:__write_once_size
Cyclomatic Complexity 1 include/linux/kasan-checks.h:kasan_check_read
Cyclomatic Complexity 1 arch/x86/include/asm/bitops.h:__ffs
Cyclomatic Complexity 1 arch/x86/include/asm/bitops.h:fls
Cyclomatic Complexity 1 include/linux/log2.h:__ilog2_u32
Cyclomatic Complexity 1 include/linux/list.h:__list_del
Cyclomatic Complexity 1 include/linux/list.h:list_empty
Cyclomatic Complexity 1 include/asm-generic/getorder.h:__get_order
Cyclomatic Complexity 1 arch/x86/include/asm/atomic.h:arch_atomic_read
Cyclomatic Complexity 1 include/asm-generic/atomic-instrumented.h:atomic_read
Cyclomatic Complexity 1 include/linux/ioport.h:resource_size
Cyclomatic Complexity 1 include/linux/ioport.h:resource_type
Cyclomatic Complexity 3 include/linux/slab.h:kmalloc_type
Cyclomatic Complexity 56 include/linux/slab.h:kmalloc_index
Cyclomatic Complexity 67 include/linux/slab.h:kmalloc_large
Cyclomatic Complexity 7 include/linux/slab.h:kmalloc
Cyclomatic Complexity 1 include/linux/slab.h:kzalloc
Cyclomatic Complexity 1 include/linux/pci.h:pci_is_root_bus
Cyclomatic Complexity 1 include/linux/pci.h:pci_is_bridge
Cyclomatic Complexity 1 include/linux/pci.h:pci_is_enabled
Cyclomatic Complexity 1 arch/x86/include/asm/pci.h:pci_domain_nr
Cyclomatic Complexity 2 include/linux/acpi.h:acpi_device_handle
Cyclomatic Complexity 1 drivers/pci/pci.h:pci_has_subordinate
Cyclomatic Complexity 1 drivers/pci/setup-bus.c:reset_resource
Cyclomatic Complexity 2 drivers/pci/setup-bus.c:pci_fail_res_type_mask
Cyclomatic Complexity 1 drivers/pci/setup-bus.c:pci_realloc_enabled
Cyclomatic Complexity 1 drivers/pci/setup-bus.c:pci_realloc_detect
Cyclomatic Complexity 7 drivers/pci/setup-bus.c:pci_bridge_check_ranges
Cyclomatic Complexity 4 drivers/pci/setup-bus.c:res_to_dev_res
Cyclomatic Complexity 2 drivers/pci/setup-bus.c:get_res_add_size
Cyclomatic Complexity 2 drivers/pci/setup-bus.c:get_res_add_align
Cyclomatic Complexity 7 drivers/pci/setup-bus.c:calculate_iosize
Cyclomatic Complexity 6 drivers/pci/setup-bus.c:calculate_mem_align
Cyclomatic Complexity 7 drivers/pci/setup-bus.c:calculate_memsize
Cyclomatic Complexity 17 drivers/pci/setup-bus.c:pci_need_to_release
Cyclomatic Complexity 12 include/linux/ioport.h:resource_contains
Cyclomatic Complexity 4 drivers/pci/setup-bus.c:pci_bus_get_depth
Cyclomatic Complexity 5 drivers/pci/setup-bus.c:extend_bridge_window
Cyclomatic Complexity 3 arch/x86/include/asm/div64.h:div_u64_rem
Cyclomatic Complexity 1 include/linux/math64.h:div_u64
Cyclomatic Complexity 3 drivers/pci/setup-bus.c:pci_setup_bridge_mmio
Cyclomatic Complexity 5 drivers/pci/setup-bus.c:pci_setup_bridge_mmio_pref
Cyclomatic Complexity 5 drivers/pci/setup-bus.c:pci_setup_bridge_io
Cyclomatic Complexity 7 drivers/pci/setup-bus.c:__pci_setup_bridge
Cyclomatic Complexity 10 drivers/pci/setup-bus.c:pci_claim_device_resources
Cyclomatic Complexity 4 drivers/pci/setup-bus.c:pci_bus_allocate_dev_resources
Cyclomatic Complexity 2 include/linux/list.h:__list_add
Cyclomatic Complexity 1 include/linux/list.h:list_add
Cyclomatic Complexity 3 drivers/pci/setup-bus.c:add_to_list
Cyclomatic Complexity 23 drivers/pci/setup-bus.c:pci_bus_size_cardbus
Cyclomatic Complexity 1 include/linux/list.h:list_add_tail
Cyclomatic Complexity 22 drivers/pci/setup-bus.c:find_free_bus_resource
Cyclomatic Complexity 14 drivers/pci/setup-bus.c:pci_bus_dump_res
Cyclomatic Complexity 4 drivers/pci/setup-bus.c:pci_bus_dump_resources
Cyclomatic Complexity 2 include/linux/list.h:__list_del_entry
Cyclomatic Complexity 1 include/linux/list.h:list_move_tail
Cyclomatic Complexity 1 include/linux/list.h:list_del
Cyclomatic Complexity 4 drivers/pci/setup-bus.c:remove_from_list
Cyclomatic Complexity 2 drivers/pci/setup-bus.c:free_list
Cyclomatic Complexity 15 drivers/pci/setup-bus.c:assign_requested_resources_sorted
Cyclomatic Complexity 12 drivers/pci/setup-bus.c:reassign_resources_sorted
Cyclomatic Complexity 8 drivers/pci/setup-bus.c:assign_fixed_resource_on_bus
Cyclomatic Complexity 15 drivers/pci/setup-bus.c:pdev_assign_fixed_resources
Cyclomatic Complexity 20 drivers/pci/setup-bus.c:pci_bridge_release_resources
Cyclomatic Complexity 13 drivers/pci/setup-bus.c:pci_bus_release_bridge_resources
Cyclomatic Complexity 9 drivers/pci/setup-bus.c:pci_setup_cardbus
Cyclomatic Complexity 1 drivers/pci/setup-bus.c:pcibios_setup_bridge
Cyclomatic Complexity 1 drivers/pci/setup-bus.c:pci_setup_bridge
Cyclomatic Complexity 11 drivers/pci/setup-bus.c:pci_claim_bridge_resource
Cyclomatic Complexity 10 drivers/pci/setup-bus.c:pci_claim_bridge_resources
Cyclomatic Complexity 4 drivers/pci/setup-bus.c:pci_bus_allocate_resources
Cyclomatic Complexity 1 drivers/pci/setup-bus.c:pcibios_window_alignment
Cyclomatic Complexity 7 drivers/pci/setup-bus.c:window_alignment
Cyclomatic Complexity 5 drivers/pci/setup-bus.c:pci_cardbus_resource_alignment
Cyclomatic Complexity 5 drivers/pci/pci.h:pci_resource_alignment
Cyclomatic Complexity 34 drivers/pci/setup-bus.c:pbus_size_io
Cyclomatic Complexity 55 drivers/pci/setup-bus.c:pbus_size_mem
Cyclomatic Complexity 18 drivers/pci/setup-bus.c:pdev_sort_resources
Cyclomatic Complexity 7 drivers/pci/setup-bus.c:__dev_sort_resources
Cyclomatic Complexity 26 drivers/pci/setup-bus.c:__assign_resources_sorted
Cyclomatic Complexity 2 drivers/pci/setup-bus.c:pbus_assign_resources_sorted
Cyclomatic Complexity 1 drivers/pci/setup-bus.c:pdev_assign_resources_sorted
Cyclomatic Complexity 61 drivers/pci/setup-bus.c:pci_bus_distribute_available_resources
Cyclomatic Complexity 3 drivers/pci/setup-bus.c:pci_bridge_distribute_available_resources
Cyclomatic Complexity 22 drivers/pci/setup-bus.c:__pci_bus_size_bridges
Cyclomatic Complexity 1 drivers/pci/setup-bus.c:pci_bus_size_bridges
Cyclomatic Complexity 7 drivers/pci/setup-bus.c:__pci_bus_assign_resources
Cyclomatic Complexity 5 drivers/pci/setup-bus.c:__pci_bridge_assign_resources
Cyclomatic Complexity 1 drivers/pci/setup-bus.c:pci_bus_assign_resources
Cyclomatic Complexity 1 drivers/pci/setup-bus.c:pci_bus_claim_resources
Cyclomatic Complexity 3 drivers/pci/setup-bus.c:pci_realloc_get_opt
Cyclomatic Complexity 19 drivers/pci/setup-bus.c:pci_assign_unassigned_root_bus_resources
Cyclomatic Complexity 5 drivers/pci/setup-bus.c:pci_assign_unassigned_resources
Cyclomatic Complexity 10 drivers/pci/setup-bus.c:pci_assign_unassigned_bridge_resources
Cyclomatic Complexity 21 drivers/pci/setup-bus.c:pci_reassign_bridge_resources
Cyclomatic Complexity 4 drivers/pci/setup-bus.c:pci_assign_unassigned_bus_resources
--
In file included from include/linux/pci.h:31:0,
from drivers//pci/setup-bus.c:20:
drivers//pci/setup-bus.c: In function 'extend_bridge_window':
drivers//pci/setup-bus.c:1831:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 5 has type 'resource_size_t {aka unsigned int}' [-Wformat=]
pci_dbg(bridge, "bridge window %pR extended by 0x%016llx\n", res,
^
include/linux/device.h:1380:22: note: in definition of macro 'dev_fmt'
#define dev_fmt(fmt) fmt
^~~
>> include/linux/pci.h:2362:36: note: in expansion of macro 'dev_dbg'
#define pci_dbg(pdev, fmt, arg...) dev_dbg(&(pdev)->dev, fmt, ##arg)
^~~~~~~
drivers//pci/setup-bus.c:1831:2: note: in expansion of macro 'pci_dbg'
pci_dbg(bridge, "bridge window %pR extended by 0x%016llx\n", res,
^~~~~~~
Cyclomatic Complexity 5 include/linux/compiler.h:__read_once_size
Cyclomatic Complexity 5 include/linux/compiler.h:__write_once_size
Cyclomatic Complexity 1 include/linux/kasan-checks.h:kasan_check_read
Cyclomatic Complexity 1 arch/x86/include/asm/bitops.h:__ffs
Cyclomatic Complexity 1 arch/x86/include/asm/bitops.h:fls
Cyclomatic Complexity 1 include/linux/log2.h:__ilog2_u32
Cyclomatic Complexity 1 include/linux/list.h:__list_del
Cyclomatic Complexity 1 include/linux/list.h:list_empty
Cyclomatic Complexity 1 include/asm-generic/getorder.h:__get_order
Cyclomatic Complexity 1 arch/x86/include/asm/atomic.h:arch_atomic_read
Cyclomatic Complexity 1 include/asm-generic/atomic-instrumented.h:atomic_read
Cyclomatic Complexity 1 include/linux/ioport.h:resource_size
Cyclomatic Complexity 1 include/linux/ioport.h:resource_type
Cyclomatic Complexity 3 include/linux/slab.h:kmalloc_type
Cyclomatic Complexity 56 include/linux/slab.h:kmalloc_index
Cyclomatic Complexity 67 include/linux/slab.h:kmalloc_large
Cyclomatic Complexity 7 include/linux/slab.h:kmalloc
Cyclomatic Complexity 1 include/linux/slab.h:kzalloc
Cyclomatic Complexity 1 include/linux/pci.h:pci_is_root_bus
Cyclomatic Complexity 1 include/linux/pci.h:pci_is_bridge
Cyclomatic Complexity 1 include/linux/pci.h:pci_is_enabled
Cyclomatic Complexity 1 arch/x86/include/asm/pci.h:pci_domain_nr
Cyclomatic Complexity 2 include/linux/acpi.h:acpi_device_handle
Cyclomatic Complexity 1 drivers//pci/pci.h:pci_has_subordinate
Cyclomatic Complexity 1 drivers//pci/setup-bus.c:reset_resource
Cyclomatic Complexity 2 drivers//pci/setup-bus.c:pci_fail_res_type_mask
Cyclomatic Complexity 1 drivers//pci/setup-bus.c:pci_realloc_enabled
Cyclomatic Complexity 1 drivers//pci/setup-bus.c:pci_realloc_detect
Cyclomatic Complexity 7 drivers//pci/setup-bus.c:pci_bridge_check_ranges
Cyclomatic Complexity 4 drivers//pci/setup-bus.c:res_to_dev_res
Cyclomatic Complexity 2 drivers//pci/setup-bus.c:get_res_add_size
Cyclomatic Complexity 2 drivers//pci/setup-bus.c:get_res_add_align
Cyclomatic Complexity 7 drivers//pci/setup-bus.c:calculate_iosize
Cyclomatic Complexity 6 drivers//pci/setup-bus.c:calculate_mem_align
Cyclomatic Complexity 7 drivers//pci/setup-bus.c:calculate_memsize
Cyclomatic Complexity 17 drivers//pci/setup-bus.c:pci_need_to_release
Cyclomatic Complexity 12 include/linux/ioport.h:resource_contains
Cyclomatic Complexity 4 drivers//pci/setup-bus.c:pci_bus_get_depth
Cyclomatic Complexity 5 drivers//pci/setup-bus.c:extend_bridge_window
Cyclomatic Complexity 3 arch/x86/include/asm/div64.h:div_u64_rem
Cyclomatic Complexity 1 include/linux/math64.h:div_u64
Cyclomatic Complexity 3 drivers//pci/setup-bus.c:pci_setup_bridge_mmio
Cyclomatic Complexity 5 drivers//pci/setup-bus.c:pci_setup_bridge_mmio_pref
Cyclomatic Complexity 5 drivers//pci/setup-bus.c:pci_setup_bridge_io
Cyclomatic Complexity 7 drivers//pci/setup-bus.c:__pci_setup_bridge
Cyclomatic Complexity 10 drivers//pci/setup-bus.c:pci_claim_device_resources
Cyclomatic Complexity 4 drivers//pci/setup-bus.c:pci_bus_allocate_dev_resources
Cyclomatic Complexity 2 include/linux/list.h:__list_add
Cyclomatic Complexity 1 include/linux/list.h:list_add
Cyclomatic Complexity 3 drivers//pci/setup-bus.c:add_to_list
Cyclomatic Complexity 23 drivers//pci/setup-bus.c:pci_bus_size_cardbus
Cyclomatic Complexity 1 include/linux/list.h:list_add_tail
Cyclomatic Complexity 22 drivers//pci/setup-bus.c:find_free_bus_resource
Cyclomatic Complexity 14 drivers//pci/setup-bus.c:pci_bus_dump_res
Cyclomatic Complexity 4 drivers//pci/setup-bus.c:pci_bus_dump_resources
Cyclomatic Complexity 2 include/linux/list.h:__list_del_entry
Cyclomatic Complexity 1 include/linux/list.h:list_move_tail
Cyclomatic Complexity 1 include/linux/list.h:list_del
Cyclomatic Complexity 4 drivers//pci/setup-bus.c:remove_from_list
Cyclomatic Complexity 2 drivers//pci/setup-bus.c:free_list
Cyclomatic Complexity 15 drivers//pci/setup-bus.c:assign_requested_resources_sorted
Cyclomatic Complexity 12 drivers//pci/setup-bus.c:reassign_resources_sorted
Cyclomatic Complexity 8 drivers//pci/setup-bus.c:assign_fixed_resource_on_bus
Cyclomatic Complexity 15 drivers//pci/setup-bus.c:pdev_assign_fixed_resources
Cyclomatic Complexity 20 drivers//pci/setup-bus.c:pci_bridge_release_resources
Cyclomatic Complexity 13 drivers//pci/setup-bus.c:pci_bus_release_bridge_resources
Cyclomatic Complexity 9 drivers//pci/setup-bus.c:pci_setup_cardbus
Cyclomatic Complexity 1 drivers//pci/setup-bus.c:pcibios_setup_bridge
Cyclomatic Complexity 1 drivers//pci/setup-bus.c:pci_setup_bridge
Cyclomatic Complexity 11 drivers//pci/setup-bus.c:pci_claim_bridge_resource
Cyclomatic Complexity 10 drivers//pci/setup-bus.c:pci_claim_bridge_resources
Cyclomatic Complexity 4 drivers//pci/setup-bus.c:pci_bus_allocate_resources
Cyclomatic Complexity 1 drivers//pci/setup-bus.c:pcibios_window_alignment
Cyclomatic Complexity 7 drivers//pci/setup-bus.c:window_alignment
Cyclomatic Complexity 5 drivers//pci/setup-bus.c:pci_cardbus_resource_alignment
Cyclomatic Complexity 5 drivers//pci/pci.h:pci_resource_alignment
Cyclomatic Complexity 34 drivers//pci/setup-bus.c:pbus_size_io
Cyclomatic Complexity 55 drivers//pci/setup-bus.c:pbus_size_mem
Cyclomatic Complexity 18 drivers//pci/setup-bus.c:pdev_sort_resources
Cyclomatic Complexity 7 drivers//pci/setup-bus.c:__dev_sort_resources
Cyclomatic Complexity 26 drivers//pci/setup-bus.c:__assign_resources_sorted
Cyclomatic Complexity 2 drivers//pci/setup-bus.c:pbus_assign_resources_sorted
Cyclomatic Complexity 1 drivers//pci/setup-bus.c:pdev_assign_resources_sorted
Cyclomatic Complexity 61 drivers//pci/setup-bus.c:pci_bus_distribute_available_resources
Cyclomatic Complexity 3 drivers//pci/setup-bus.c:pci_bridge_distribute_available_resources
Cyclomatic Complexity 22 drivers//pci/setup-bus.c:__pci_bus_size_bridges
Cyclomatic Complexity 1 drivers//pci/setup-bus.c:pci_bus_size_bridges
Cyclomatic Complexity 7 drivers//pci/setup-bus.c:__pci_bus_assign_resources
Cyclomatic Complexity 5 drivers//pci/setup-bus.c:__pci_bridge_assign_resources
Cyclomatic Complexity 1 drivers//pci/setup-bus.c:pci_bus_assign_resources
Cyclomatic Complexity 1 drivers//pci/setup-bus.c:pci_bus_claim_resources
Cyclomatic Complexity 3 drivers//pci/setup-bus.c:pci_realloc_get_opt
Cyclomatic Complexity 19 drivers//pci/setup-bus.c:pci_assign_unassigned_root_bus_resources
Cyclomatic Complexity 5 drivers//pci/setup-bus.c:pci_assign_unassigned_resources
Cyclomatic Complexity 10 drivers//pci/setup-bus.c:pci_assign_unassigned_bridge_resources
vim +/pci_dbg +1831 drivers/pci/setup-bus.c
1816
1817 static void extend_bridge_window(struct pci_dev *bridge, struct resource *res,
1818 struct list_head *add_list, resource_size_t available)
1819 {
1820 struct pci_dev_resource *dev_res;
1821
1822 if (res->parent)
1823 return;
1824
1825 /*
1826 * Hot-adding multiple Thunderbolt devices in SL0 might result in
1827 * multiple devices being enumerated together. This can break the
1828 * resource allocation if the resource sizes are specified with
1829 * add_size instead of simply changing the resource size.
1830 */
> 1831 pci_dbg(bridge, "bridge window %pR extended by 0x%016llx\n", res,
1832 available - resource_size(res));
1833 res->end = res->start + available - 1;
1834
1835 /*
1836 * If a list entry exists, we need to remove any additional size
1837 * requested because that could interfere with the alignment and
1838 * sizing done when distributing resources, causing resources to
1839 * fail to allocate later on.
1840 */
1841 dev_res = res_to_dev_res(add_list, res);
1842 if (!dev_res)
1843 return;
1844
1845 dev_res->add_size = 0;
1846 }
1847
---
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