#include "perf.h" #include "util/util.h" #include "util/debug.h" #include #include "util/parse-regs-options.h" int parse_regs(const struct option *opt, const char *str, int unset) { uint64_t *mode = (uint64_t *)opt->value; const struct sample_reg *r; char *s, *os = NULL, *p; int ret = -1; if (unset) return 0; /* * cannot set it twice */ if (*mode) return -1; /* str may be NULL in case no arg is passed to -I */ if (str) { /* because str is read-only */ s = os = strdup(str); if (!s) return -1; for (;;) { p = strchr(s, ','); if (p) *p = '\0'; if (!strcmp(s, "?")) { fprintf(stderr, "available registers: "); for (r = sample_reg_masks; r->name; r++) { fprintf(stderr, "%s ", r->name); } fputc('\n', stderr); /* just printing available regs */ return -1; } for (r = sample_reg_masks; r->name; r++) { if (!strcasecmp(s, r->name)) break; } if (!r->name) { ui__warning("unknown register %s," " check man page\n", s); goto error; } *mode |= r->mask; if (!p) break; s = p + 1; } } ret = 0; /* default to all possible regs */ if (*mode == 0) *mode = PERF_REGS_MASK; error: free(os); return ret; } tion value='packet-rx-pump-back'>packet-rx-pump-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 /include/kvm/arm_vgic.h
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 'include/kvm/arm_vgic.h')