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path: root/tools/lib/vsprintf.c
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#include <sys/types.h>
#include <linux/kernel.h>
#include <stdio.h>

int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
{
       int i = vsnprintf(buf, size, fmt, args);
       ssize_t ssize = size;

       return (i >= ssize) ? (ssize - 1) : i;
}

int scnprintf(char * buf, size_t size, const char * fmt, ...)
{
       ssize_t ssize = size;
       va_list args;
       int i;

       va_start(args, fmt);
       i = vsnprintf(buf, size, fmt, args);
       va_end(args);

       return (i >= ssize) ? (ssize - 1) : i;
}
d0a143'>net/can/gw.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 'net/can/gw.c')