#! /bin/sh set -e PREFIX=$1 shift trap 'rm -r $TMPDIR' 0 TMPDIR=`mktemp -d` exec 3>/dev/null for f; do while IFS=" " read -r LINE; do case "$LINE" in *$PREFIX:[0-9]*:\**) NUM=`echo "$LINE" | sed "s/.*$PREFIX:\([0-9]*\).*/\1/"` if [ -f $TMPDIR/$NUM ]; then echo "$TMPDIR/$NUM already exits prior to $f" exit 1 fi exec 3>>$TMPDIR/$NUM echo $f | sed 's,\.\./,,g' > $TMPDIR/.$NUM /bin/echo "$LINE" | sed -e "s/$PREFIX:[0-9]*//" -e "s/:\*/*/" >&3 ;; *$PREFIX:[0-9]*) NUM=`echo "$LINE" | sed "s/.*$PREFIX:\([0-9]*\).*/\1/"` if [ -f $TMPDIR/$NUM ]; then echo "$TMPDIR/$NUM already exits prior to $f" exit 1 fi exec 3>>$TMPDIR/$NUM echo $f | sed 's,\.\./,,g' > $TMPDIR/.$NUM /bin/echo "$LINE" | sed "s/$PREFIX:[0-9]*//" >&3 ;; *:\**) /bin/echo "$LINE" | sed -e "s/:\*/*/" -e "s,/\*\*/,," >&3 echo >&3 exec 3>/dev/null ;; *) /bin/echo "$LINE" >&3 ;; esac done < $f echo >&3 exec 3>/dev/null done LASTFILE="" for f in $TMPDIR/*; do if [ "$LASTFILE" != $(cat $TMPDIR/.$(basename $f) ) ]; then LASTFILE=$(cat $TMPDIR/.$(basename $f) ) echo "[ $LASTFILE ]" fi cat $f done tion value='nds-private-remove' selected='selected'>nds-private-remove 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/acpi/acpi_io.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/acpi/acpi_io.h')