#include #include #include "tests.h" #include "cpumap.h" #include "debug.h" #define NBITS 100 static unsigned long *get_bitmap(const char *str, int nbits) { struct cpu_map *map = cpu_map__new(str); unsigned long *bm = NULL; int i; bm = bitmap_alloc(nbits); if (map && bm) { bitmap_zero(bm, nbits); for (i = 0; i < map->nr; i++) set_bit(map->map[i], bm); } if (map) cpu_map__put(map); return bm; } static int test_bitmap(const char *str) { unsigned long *bm = get_bitmap(str, NBITS); char buf[100]; int ret; bitmap_scnprintf(bm, NBITS, buf, sizeof(buf)); pr_debug("bitmap: %s\n", buf); ret = !strcmp(buf, str); free(bm); return ret; } int test__bitmap_print(int subtest __maybe_unused) { TEST_ASSERT_VAL("failed to convert map", test_bitmap("1")); TEST_ASSERT_VAL("failed to convert map", test_bitmap("1,5")); TEST_ASSERT_VAL("failed to convert map", test_bitmap("1,3,5,7,9,11,13,15,17,19,21-40")); TEST_ASSERT_VAL("failed to convert map", test_bitmap("2-5")); TEST_ASSERT_VAL("failed to convert map", test_bitmap("1,3-6,8-10,24,35-37")); TEST_ASSERT_VAL("failed to convert map", test_bitmap("1,3-6,8-10,24,35-37")); TEST_ASSERT_VAL("failed to convert map", test_bitmap("1-10,12-20,22-30,32-40")); return 0; } -loop-back net-next plumbingsTobias Klauser
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authorBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
committerBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
commit030305d69fc6963c16003f50d7e8d74b02d0a143 (patch)
tree363a4e34d199178769b7e7eeb26ea2620a55847b /sound/isa/cmi8328.c
parent4d191b1b63c209e37bf27938ef365244d3c41084 (diff)
PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies
In a struct pcie_link_state, link->root points to the pcie_link_state of the root of the PCIe hierarchy. For the topmost link, this points to itself (link->root = link). For others, we copy the pointer from the parent (link->root = link->parent->root). Previously we recognized that Root Ports originated PCIe hierarchies, but we treated PCI/PCI-X to PCIe Bridges as being in the middle of the hierarchy, and when we tried to copy the pointer from link->parent->root, there was no parent, and we dereferenced a NULL pointer: BUG: unable to handle kernel NULL pointer dereference at 0000000000000090 IP: [<ffffffff9e424350>] pcie_aspm_init_link_state+0x170/0x820 Recognize that PCI/PCI-X to PCIe Bridges originate PCIe hierarchies just like Root Ports do, so link->root for these devices should also point to itself. Fixes: 51ebfc92b72b ("PCI: Enumerate switches below PCI-to-PCIe bridges") Link: https://bugzilla.kernel.org/show_bug.cgi?id=193411 Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1022181 Tested-by: lists@ssl-mail.com Tested-by: Jayachandran C. <jnair@caviumnetworks.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v4.2+
Diffstat (limited to 'sound/isa/cmi8328.c')