Pull driver core and debugfs updates from Greg KH:
"Here is the "big" driver core and debugfs changes for 5.3-rc1
It's a lot of different patches, all across the tree due to some api
changes and lots of debugfs cleanups.
Other than the debugfs cleanups, in this set of changes we have:
- bus iteration function cleanups
- scripts/get_abi.pl tool to display and parse Documentation/ABI
entries in a simple way
- cleanups to Documenatation/ABI/ entries to make them parse easier
due to typos and other minor things
- default_attrs use for some ktype users
- driver model documentation file conversions to .rst
- compressed firmware file loading
- deferred probe fixes
All of these have been in linux-next for a while, with a bunch of
merge issues that Stephen has been patient with me for"
* tag 'driver-core-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (102 commits)
debugfs: make error message a bit more verbose
orangefs: fix build warning from debugfs cleanup patch
ubifs: fix build warning after debugfs cleanup patch
driver: core: Allow subsystems to continue deferring probe
drivers: base: cacheinfo: Ensure cpu hotplug work is done before Intel RDT
arch_topology: Remove error messages on out-of-memory conditions
lib: notifier-error-inject: no need to check return value of debugfs_create functions
swiotlb: no need to check return value of debugfs_create functions
ceph: no need to check return value of debugfs_create functions
sunrpc: no need to check return value of debugfs_create functions
ubifs: no need to check return value of debugfs_create functions
orangefs: no need to check return value of debugfs_create functions
nfsd: no need to check return value of debugfs_create functions
lib: 842: no need to check return value of debugfs_create functions
debugfs: provide pr_fmt() macro
debugfs: log errors when something goes wrong
drivers: s390/cio: Fix compilation warning about const qualifiers
drivers: Add generic helper to match by of_node
driver_find_device: Unify the match function with class_find_device()
bus_find_device: Unify the match callback with class_find_device
...
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation this program is
distributed in the hope that it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details the full gnu general public license is included in
this distribution in the file called copying
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 39 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141901.397680977@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation this program is
distributed in the hope that it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 655 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Pull rdma updates from Jason Gunthorpe:
"This has been a slightly more active cycle than normal with ongoing
core changes and quite a lot of collected driver updates.
- Various driver fixes for bnxt_re, cxgb4, hns, mlx5, pvrdma, rxe
- A new data transfer mode for HFI1 giving higher performance
- Significant functional and bug fix update to the mlx5
On-Demand-Paging MR feature
- A chip hang reset recovery system for hns
- Change mm->pinned_vm to an atomic64
- Update bnxt_re to support a new 57500 chip
- A sane netlink 'rdma link add' method for creating rxe devices and
fixing the various unregistration race conditions in rxe's
unregister flow
- Allow lookup up objects by an ID over netlink
- Various reworking of the core to driver interface:
- drivers should not assume umem SGLs are in PAGE_SIZE chunks
- ucontext is accessed via udata not other means
- start to make the core code responsible for object memory
allocation
- drivers should convert struct device to struct ib_device via a
helper
- drivers have more tools to avoid use after unregister problems"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (280 commits)
net/mlx5: ODP support for XRC transport is not enabled by default in FW
IB/hfi1: Close race condition on user context disable and close
RDMA/umem: Revert broken 'off by one' fix
RDMA/umem: minor bug fix in error handling path
RDMA/hns: Use GFP_ATOMIC in hns_roce_v2_modify_qp
cxgb4: kfree mhp after the debug print
IB/rdmavt: Fix concurrency panics in QP post_send and modify to error
IB/rdmavt: Fix loopback send with invalidate ordering
IB/iser: Fix dma_nents type definition
IB/mlx5: Set correct write permissions for implicit ODP MR
bnxt_re: Clean cq for kernel consumers only
RDMA/uverbs: Don't do double free of allocated PD
RDMA: Handle ucontext allocations by IB/core
RDMA/core: Fix a WARN() message
bnxt_re: fix the regression due to changes in alloc_pbl
IB/mlx4: Increase the timeout for CM cache
IB/core: Abort page fault handler silently during owning process exit
IB/mlx5: Validate correct PD before prefetch MR
IB/mlx5: Protect against prefetch of invalid MR
RDMA/uverbs: Store PR pointer before it is overwritten
...
In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.
This patch fixes the following warning:
drivers/misc/mic/scif/scif_rma.c: In function ‘scif_unregister_window’:
drivers/misc/mic/scif/scif_rma.c:665:12: warning: this statement may fall through [-Wimplicit-fallthrough=]
send_msg = true;
~~~~~~~~~^~~~~~
drivers/misc/mic/scif/scif_rma.c:668:2: note: here
case OP_IN_PROGRESS:
^~~~
Warning level 3 was used: -Wimplicit-fallthrough=3
Notice that, in this particular case, the code comment is modified
in accordance with what GCC is expecting to find.
This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
VOP_BUS does not actually depend on x86-64 or PCI or X86_DEV_DMA_OPS.
The dependency on X86_DEV_DMA_OPS has been unnecessary since commit
5657933dbb ("treewide: Move dma_ops from struct dev_archdata into
struct device").
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Some architectures (like MIPS) implement ioremap as a macro, and this
leads to conflicts with the ioremap function pointer in various mic
structures.
drivers/misc/mic/vop/vop_vringh.c:
In function 'vop_virtio_init_post':
drivers/misc/mic/vop/vop_vringh.c:86:13:
error: macro "ioremap" passed 3 arguments, but takes just 2
Rename ioremap to remap to fix this. Likewise for iounmap.
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix these on 32-bit:
vop_vringh.c:711:13: error: cast from pointer to integer of different
size [-Werror=pointer-to-int-cast]
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The driver uses mmap_sem for both pinned_vm accounting and
get_user_pages(). By using gup_fast() and letting the mm handle the lock
if needed, we can no longer rely on the semaphore and simplify the whole
thing.
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Taking a sleeping lock to _only_ increment a variable is quite the
overkill, and pretty much all users do this. Furthermore, some drivers
(ie: infiniband and scif) that need pinned semantics can go to quite
some trouble to actually delay via workqueue (un)accounting for pinned
pages when not possible to acquire it.
By making the counter atomic we no longer need to hold the mmap_sem and
can simply some code around it for pinned_vm users. The counter is 64-bit
such that we need not worry about overflows such as rdma user input
controlled from userspace.
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Christoph Lameter <cl@linux.com>
Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
The remove path contains a hack which depends on internal structures in
other source files, similar to the one which was recently removed from
the registration path. Since commit 1ce9e6055f ("virtio_ring:
introduce packed ring support"), this leads to a crash when vop devices
are removed.
The structure in question is only examined to get the virtual address of
the allocated used page. Store that pointer locally instead to fix the
crash.
Fixes: 1ce9e6055f ("virtio_ring: introduce packed ring support")
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
KASAN detects a use-after-free when vop devices are removed.
This problem was introduced by commit 0063e8bbd2 ("virtio_vop:
don't kfree device on register failure"). That patch moved the freeing
of the struct _vop_vdev to the release function, but failed to ensure
that vop holds a reference to the device when it doesn't want it to go
away. A kfree() was replaced with a put_device() in the unregistration
path, but the last reference to the device is already dropped in
unregister_virtio_device() so the struct is freed before vop is done
with it.
Fix it by holding a reference until cleanup is done. This is similar to
the fix in virtio_pci in commit 2989be09a8 ("virtio_pci: fix use
after free on release").
==================================================================
BUG: KASAN: use-after-free in vop_scan_devices+0xc6c/0xe50 [vop]
Read of size 8 at addr ffff88800da18580 by task kworker/0:1/12
CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.0.0-rc4+ #53
Workqueue: events vop_hotplug_devices [vop]
Call Trace:
dump_stack+0x74/0xbb
print_address_description+0x5d/0x2b0
? vop_scan_devices+0xc6c/0xe50 [vop]
kasan_report+0x152/0x1aa
? vop_scan_devices+0xc6c/0xe50 [vop]
? vop_scan_devices+0xc6c/0xe50 [vop]
vop_scan_devices+0xc6c/0xe50 [vop]
? vop_loopback_free_irq+0x160/0x160 [vop_loopback]
process_one_work+0x7c0/0x14b0
? pwq_dec_nr_in_flight+0x2d0/0x2d0
? do_raw_spin_lock+0x120/0x280
worker_thread+0x8f/0xbf0
? __kthread_parkme+0x78/0xf0
? process_one_work+0x14b0/0x14b0
kthread+0x2ae/0x3a0
? kthread_park+0x120/0x120
ret_from_fork+0x3a/0x50
Allocated by task 12:
kmem_cache_alloc_trace+0x13a/0x2a0
vop_scan_devices+0x473/0xe50 [vop]
process_one_work+0x7c0/0x14b0
worker_thread+0x8f/0xbf0
kthread+0x2ae/0x3a0
ret_from_fork+0x3a/0x50
Freed by task 12:
kfree+0x104/0x310
device_release+0x73/0x1d0
kobject_put+0x14f/0x420
unregister_virtio_device+0x32/0x50
vop_scan_devices+0x19d/0xe50 [vop]
process_one_work+0x7c0/0x14b0
worker_thread+0x8f/0xbf0
kthread+0x2ae/0x3a0
ret_from_fork+0x3a/0x50
The buggy address belongs to the object at ffff88800da18008
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1400 bytes inside of
2048-byte region [ffff88800da18008, ffff88800da18808)
The buggy address belongs to the page:
page:ffffea0000368600 count:1 mapcount:0 mapping:ffff88801440dbc0 index:0x0 compound_mapcount: 0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 ffffea0000378608 ffffea000037a008 ffff88801440dbc0
raw: 0000000000000000 00000000000d000d 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88800da18480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88800da18500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88800da18580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88800da18600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88800da18680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Fixes: 0063e8bbd2 ("virtio_vop: don't kfree device on register failure")
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
VOP is broken in mainline since commit 1ce9e6055f ("virtio_ring:
introduce packed ring support"); attempting to use the virtqueues leads
to various kernel crashes. I'm testing it with my not-yet-merged
loopback patches, but even the in-tree MIC hardware cannot work.
The problem is not in the referenced commit per se, but is due to the
following hack in vop_find_vq() which depends on the layout of private
structures in other source files, which that commit happened to change:
/*
* To reassign the used ring here we are directly accessing
* struct vring_virtqueue which is a private data structure
* in virtio_ring.c. At the minimum, a BUILD_BUG_ON() in
* vring_new_virtqueue() would ensure that
* (&vq->vring == (struct vring *) (&vq->vq + 1));
*/
vr = (struct vring *)(vq + 1);
vr->used = used;
Fix vop by using __vring_new_virtqueue() to create the needed vring
layout from the start, instead of attempting to patch in the used ring
later. __vring_new_virtqueue() was added way back in commit
2a2d1382fe ("virtio: Add improved queue allocation API") in order to
address mic's usecase, according to the commit message.
Fixes: 1ce9e6055f ("virtio_ring: introduce packed ring support")
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fallback gracefully if no DMA channel is provided instead of
dereferencing NULL pointers.
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Include <linux/io-64-nonatomic-lo-hi.h> so that readq/writeq are
replaced by two readl/writel on systems that do not support them. The
values read/written are pointers which will be 32-bit on 32-bit systems
so the non-atomicity should not matter.
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixes these kind of errors on 32-bit:
drivers/misc/mic/vop/vop_vringh.c:590:3:
error: format '%lx' expects argument of type 'long unsigned int',
but argument 7 has type 'size_t {aka unsigned int}' [-Werror=format=]
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Some vqs may not need to be allocated when their related feature bits
are disabled. So callers may pass in such vqs with "names = NULL".
Then we skip such vq allocations.
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 86a559787e ("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT")
Linus Torvalds
Greg Kroah-Hartman
Kefeng Wang
Thomas Gleixner
Christoph Hellwig
Gustavo A. R. Silva
Vincent Whitchurch
Davidlohr Bueso
Peng Hao
Wei Wang