Revision 1d5a474240407c38ca8c7484a656ee39f585399c authored by Martin Habets on 02 January 2022, 08:41:22 UTC, committed by Jakub Kicinski on 05 January 2022, 02:14:21 UTC
The RX page_ring is an optional feature that improves
performance. When allocation fails the driver can still
function, but possibly with a lower bandwidth.
Guard against dereferencing a NULL page_ring.
Fixes: 2768935a4660 ("sfc: reuse pages to avoid DMA mapping/unmapping costs")
Signed-off-by: Martin Habets <habetsm.xilinx@gmail.com>
Reported-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/164111288276.5798.10330502993729113868.stgit@palantir17.mph.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
1 parent 6f89ecf
index.rst
.. _filesystems_index:
===============================
Filesystems in the Linux kernel
===============================
This under-development manual will, some glorious day, provide
comprehensive information on how the Linux virtual filesystem (VFS) layer
works, along with the filesystems that sit below it. For now, what we have
can be found below.
Core VFS documentation
======================
See these manuals for documentation about the VFS layer itself and how its
algorithms work.
.. toctree::
:maxdepth: 2
vfs
path-lookup
api-summary
splice
locking
directory-locking
devpts
dnotify
fiemap
files
locks
mount_api
quota
seq_file
sharedsubtree
idmappings
automount-support
caching/index
porting
Filesystem support layers
=========================
Documentation for the support code within the filesystem layer for use in
filesystem implementations.
.. toctree::
:maxdepth: 2
journalling
fscrypt
fsverity
netfs_library
Filesystems
===========
Documentation for filesystem implementations.
.. toctree::
:maxdepth: 2
9p
adfs
affs
afs
autofs
autofs-mount-control
befs
bfs
btrfs
cifs/index
ceph
coda
configfs
cramfs
dax
debugfs
dlmfs
ecryptfs
efivarfs
erofs
ext2
ext3
ext4/index
f2fs
gfs2
gfs2-uevents
gfs2-glocks
hfs
hfsplus
hpfs
fuse
fuse-io
inotify
isofs
nilfs2
nfs/index
ntfs
ntfs3
ocfs2
ocfs2-online-filecheck
omfs
orangefs
overlayfs
proc
qnx6
ramfs-rootfs-initramfs
relay
romfs
spufs/index
squashfs
sysfs
sysv-fs
tmpfs
ubifs
ubifs-authentication
udf
virtiofs
vfat
xfs-delayed-logging-design
xfs-self-describing-metadata
zonefs
Computing file changes ...
