It is possible to stack multiple DSA switches in a way that they are not
part of the tree (disjoint) but the DSA master of a switch is a DSA
slave of another. When that happens switch drivers may have to know this
is the case so as to determine whether their tagging protocol has a
remove chance of working.

This is useful for specific switch drivers such as b53 where devices
have been known to be stacked in the wild without the Broadcom tag
protocol supporting that feature. This allows b53 to continue supporting
those devices by forcing the disabling of Broadcom tags on the outermost
switches if necessary.

The get_tag_protocol() function is therefore updated to gain an
additional enum dsa_tag_protocol argument which denotes the current
tagging protocol used by the DSA master we are attached to, else
DSA_TAG_PROTO_NONE for the top of the dsa_switch_tree.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Vikas Gupta says:

====================
Devlink notification after recovery complete by bnxt_en driver

 This patchset adds following feature in devlink
  1) Recovery complete direct call API to be used by drivers when it
     successfully completes. It is required as recovery triggered by
     devlink may return with EINPROGRESS and eventually recovery
     completes in different context.
  2) A notification when health status is updated by reporter.

 Patchset also contains required changes in bnxt_en driver to
 mark recovery in progress when recovery is triggered from kernel
 devlink.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Return EINPROGRESS to devlink health reporter recover as we are not yet
done and call devlink_health_reporter_recovery_done once reset is
successfully completed from workqueue context.
Signed-off-by: NVikas Gupta <vikas.gupta@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

add a devlink notification when reporter update the health
state.
Signed-off-by: NVikas Gupta <vikas.gupta@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

It is possible that a reporter recovery completion do not finish
successfully when recovery is triggered via
devlink_health_reporter_recover as recovery could be processed in
different context. In such scenario an error is returned by driver when
recover hook is invoked and successful recovery completion is
intimated later.
Expose devlink recover done API to update recovery stats.
Signed-off-by: NVikas Gupta <vikas.gupta@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Jason A. Donenfeld says:

====================
reduce open coded skb->next access for gso segment walking

This patchset introduces the skb_list_walk_safe helper macro, in order
to add some sanity to the myrid ways drivers have of walking through gso
segments. The goal is to reduce future bugs commonly caused by open
coding these sorts of things, and to in the future make it easier to
swap out the underlying list representation.

This first patch series addresses the easy uses of drivers iterating
over the returned list of skb_gso_segments, for drivers that live in
drivers/net/*. There are still other use cases to tackle later for
net/*, and after these low-hanging fruits are taken care of, I imagine
there are more subtle cases of gso segment walking that isn't just a
direct return value from skb_gso_segments, and eventually this will have
to be tackled. This series is the first in that direction.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is a straight-forward conversion case for the new function, and
while we're at it, we can remove a null write to skb->next by replacing
it with skb_mark_not_on_list.
Signed-off-by: NJason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is a straight-forward conversion case for the new function, and
while we're at it, we can remove a null write to skb->next by replacing
it with skb_mark_not_on_list.
Signed-off-by: NJason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is a straight-forward conversion case for the new function, and
while we're at it, we can remove a null write to skb->next by replacing
it with skb_mark_not_on_list.
Signed-off-by: NJason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is a straight-forward conversion case for the new function, and
while we're at it, we can remove a null write to skb->next by replacing
it with skb_mark_not_on_list.
Signed-off-by: NJason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is a straight-forward conversion case for the new function, and
while we're at it, we can remove a null write to skb->next by replacing
it with skb_mark_not_on_list.
Signed-off-by: NJason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is a straight-forward conversion case for the new function, and
while we're at it, we can remove a null write to skb->next by replacing
it with skb_mark_not_on_list.
Signed-off-by: NJason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is a straight-forward conversion case for the new function, and
while we're at it, we can remove a null write to skb->next by replacing
it with skb_mark_not_on_list.
Signed-off-by: NJason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As part of the continual effort to remove direct usage of skb->next and
skb->prev, this patch adds a helper for iterating through the
singly-linked variant of skb lists, which are used for lists of GSO
packet. The name "skb_list_..." has been chosen to match the existing
function, "kfree_skb_list, which also operates on these singly-linked
lists, and the "..._walk_safe" part is the same idiom as elsewhere in
the kernel.

This patch removes the helper from wireguard and puts it into
linux/skbuff.h, while making it a bit more robust for general usage. In
particular, parenthesis are added around the macro argument usage, and it
now accounts for trying to iterate through an already-null skb pointer,
which will simply run the iteration zero times. This latter enhancement
means it can be used to replace both do { ... } while and while (...)
open-coded idioms.

This should take care of these three possible usages, which match all
current methods of iterations.

skb_list_walk_safe(segs, skb, next) { ... }
skb_list_walk_safe(skb, skb, next) { ... }
skb_list_walk_safe(segs, skb, segs) { ... }

Gcc appears to generate efficient code for each of these.
Signed-off-by: NJason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When procfs is disabled, the fdinfo code causes a harmless
warning:

net/socket.c:1000:13: error: 'sock_show_fdinfo' defined but not used [-Werror=unused-function]
 static void sock_show_fdinfo(struct seq_file *m, struct file *f)

Move the function definition up so we can use a single #ifdef
around it.

Fixes: b4653342 ("net: Allow to show socket-specific information in /proc/[pid]/fdinfo/[fd]")
Suggested-by: NAl Viro <viro@zeniv.linux.org.uk>
Acked-by: NKirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Alex Maftei says:

====================
sfc: code refactoring

Splitting some of the driver code into different files, which will
later be used in another driver for a new product.
====================
Reviewed-by: NEdward Cree <ecree@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Once again, a tiny bit of refactoring was required to stitch the code
together (i.e. adding headers). The moved code deals with managing tx
queues and mappings.
Signed-off-by: NAlexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The moved code deals with managing rx buffers and queues.
A tiny bit of refactoring was required in other files to stitch the
code together.
Signed-off-by: NAlexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NAlexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Small code styling fixes included.
Signed-off-by: NAlexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Reallocation and copying code is included, as well as some housekeeping
code.
Other files have been patched up a bit to accommodate the changes.

Small code styling fixes included.
Signed-off-by: NAlexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Also includes interrupt enabling/disabling code.
Small code styling fixes included.
Signed-off-by: NAlexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Just a handful of function, but also removed many 'static' identifiers
so the code builds. These will, of course, be moved.
Module parameters for IRQ moderation threshold also moved.

Small code styling fixes included.
Signed-off-by: NAlexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The hardware monitor code and the reset work queue code were also
moved, with supporting macros and parameters, because they are assigned
to function pointers in the struct.
Small code styling fixes included.
Signed-off-by: NAlexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The rest of the reset code will be moved later.
Small code styling fixes included.
Signed-off-by: NAlexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The code that manages the datapath (starting, stopping, including the
port-related bits) will be common.
Three functions have been added that contain bits from other
functions. These will be moved to their final files in later patches.
Small code styling fixes included.
Signed-off-by: NAlexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Two small functions with different purposes.
Signed-off-by: NAlexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Small functions doing work that will be common, related to reset
workqueue management.
Signed-off-by: NAlexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Added more arguments for a couple of functions.
Also moved a function to the common header.
Signed-off-by: NAlexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

New headers contain prototypes of functions that will be common between
ef10 and upcoming driver.
Removed static modifier from the affected functions.
Some function prototypes were removed from existing headers.
Signed-off-by: NAlexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The hsr_debugfs_rename prototype got an extra 'void' that needs to
be removed again:

In file included from /git/arm-soc/net/hsr/hsr_main.c:12:
net/hsr/hsr_main.h:194:20: error: two or more data types in declaration specifiers
 static inline void void hsr_debugfs_rename(struct net_device *dev)

Fixes: 4c2d5e33 ("hsr: rename debugfs file when interface name is changed")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

After receiving device mac address from device, send this as
a source address for further commands instead of broadcast
address.

This will help in multi host NIC cards.
Signed-off-by: NVijay Khemka <vijaykhemka@fb.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/ethernet/3com/3c59x.c: In function ‘vortex_up’:
drivers/net/ethernet/3com/3c59x.c:1551:9: warning: variable
‘mii_reg1’ set but not used [-Wunused-but-set-variable]

It is never used, and so can be removed.
Signed-off-by: Nyu kuai <yukuai3@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Saeed Mahameed says:

====================
mlx5-updates-2020-01-07

This series adds 2 sets of changes to mlx5 driver
1) Misc updates and cleanups:

1.1) Stack usages warning cleanups and log level reduction
1.2) Increase the max number of supported rings
1.3) Support accept TC action on native NIC netdev.

2) Software steering support for multi destination steering rules:
First three patches from Erez are adding the low level FW command support
and SW steering infrastructure to create the mult-destination FW tables.

Last four patches from Alex are introducing the needed changes and APIs in
SW steering to create and manage multi-destination actions and rules.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The variable failed is being assigned a value that is never read, the
following goto statement jumps to the end of the function and variable
failed is not referenced at all.  Remove the redundant assignment.

Addresses-Coverity: ("Unused value")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Reviewed-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Simplify and fix the version information displayed by the driver.
The new info better relects what is needed to support the hardware.

Prev:
Version: 4.8.0, Pipeline 22169 0x4001, Rev 0, Bond 5, CSR 311, IRQ 2

New:
Version: 4.8.0, Id: 0x4001  Hw Rev: 5  OTP Config Select: 15

- Remove pipeline, CSR and IRQ because version x.y.z already incorporates
  this information.
- Remove bond number because it is not used.
- Remove rev number because register was not implemented, always 0
- Add HW Rev ID register to replace rev number
- Add OTP config select to show the user configuration chosen by
  the configurable GPIO pins on start-up
Signed-off-by: NVincent Cheng <vincent.cheng.xh@renesas.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The proper pointer to be passed as argument is hw
Detected using Coccinelle.

Fixes: 6517798d ("enetc: Make MDIO accessors more generic and export to include/linux/fsl")
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Reviewed-by: NVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The priv->tx_ring[] has 16 elements but only priv->num_tx_rings are
set up, the rest are NULL.  This ">" comparison should be ">=" to avoid
a potential crash.

Fixes: 0d08c9ec ("enetc: add support time specific departure base on the qos etf")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Jose Abreu says:

====================
Documentation: stmmac documentation improvements

Converts stmmac documentation to RST format.

1) Adds missing entry of stmmac documentation to MAINTAINERS.

2) Converts stmmac documentation to RST format and adds some new info.

3) Adds the new RST file to the list of files.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add the stmmac RST file to the index.
Signed-off-by: NJose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>