#include #include #include #include #include "../../util/debug.h" #include "../helpline.h" #include "../ui.h" #include "../libslang.h" char ui_helpline__last_msg[1024]; bool tui_helpline__set; static void tui_helpline__pop(void) { } static void tui_helpline__push(const char *msg) { const size_t sz = sizeof(ui_helpline__current); SLsmg_gotorc(SLtt_Screen_Rows - 1, 0); SLsmg_set_color(0); SLsmg_write_nstring((char *)msg, SLtt_Screen_Cols); SLsmg_refresh(); strncpy(ui_helpline__current, msg, sz)[sz - 1] = '\0'; } static int tui_helpline__show(const char *format, va_list ap) { int ret; static int backlog; pthread_mutex_lock(&ui__lock); ret = vscnprintf(ui_helpline__last_msg + backlog, sizeof(ui_helpline__last_msg) - backlog, format, ap); backlog += ret; tui_helpline__set = true; if (ui_helpline__last_msg[backlog - 1] == '\n') { ui_helpline__puts(ui_helpline__last_msg); SLsmg_refresh(); backlog = 0; } pthread_mutex_unlock(&ui__lock); return ret; } struct ui_helpline tui_helpline_fns = { .pop = tui_helpline__pop, .push = tui_helpline__push, .show = tui_helpline__show, }; void ui_helpline__init(void) { helpline_fns = &tui_helpline_fns; ui_helpline__puts(" "); } ck'>packet-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 /fs/xfs/xfs_inode.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 'fs/xfs/xfs_inode.c')