This patch fixes the checkpatch error about missing a blank line
after declarations.
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

This patch removes some redundant blank lines.
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

This is a complement to commit aa6dd211 ("inet: use bigger hash
table for IP ID generation"), but focusing on some specific aspects
of IPv6.

Contary to IPv4, IPv6 only uses packet IDs with fragments, and with a
minimum MTU of 1280, it's much less easy to force a remote peer to
produce many fragments to explore its ID sequence. In addition packet
IDs are 32-bit in IPv6, which further complicates their analysis. On
the other hand, it is often easier to choose among plenty of possible
source addresses and partially work around the bigger hash table the
commit above permits, which leaves IPv6 partially exposed to some
possibilities of remote analysis at the risk of weakening some
protocols like DNS if some IDs can be predicted with a good enough
probability.

Given the wide range of permitted IDs, the risk of collision is extremely
low so there's no need to rely on the positive increment algorithm that
is shared with the IPv4 code via ip_idents_reserve(). We have a fast
PRNG, so let's simply call prandom_u32() and be done with it.

Performance measurements at 10 Gbps couldn't show any difference with
the previous code, even when using a single core, because due to the
large fragments, we're limited to only ~930 kpps at 10 Gbps and the cost
of the random generation is completely offset by other operations and by
the network transfer time. In addition, this change removes the need to
update a shared entry in the idents table so it may even end up being
slightly faster on large scale systems where this matters.

The risk of at least one collision here is about 1/80 million among
10 IDs, 1/850k among 100 IDs, and still only 1/8.5k among 1000 IDs,
which remains very low compared to IPv4 where all IDs are reused
every 4 to 80ms on a 10 Gbps flow depending on packet sizes.
Reported-by: Amit Klein <aksecurity@gmail.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20210529110746.6796-1-w@1wt.euSigned-off-by: Jakub Kicinski <kuba@kernel.org>

This adds validation for used length (might come
from an untrusted device) to avoid data corruption
or loss.
Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210531135852.113-1-xieyongji@bytedance.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Use tabs to indent instead of spaces. No functional change.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210531073902.7111-7-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Now that the kernel has ftrace, any debugging calls that just do "made
it to this function!" and "leaving this function!" can be removed.
Better to use standard debugging tools.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210531073902.7111-6-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Now that the kernel has ftrace, any debugging calls that just do "made
it to this function!" and "leaving this function!" can be removed.
Better to use standard debugging tools.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210531073902.7111-5-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Now that the kernel has ftrace, any debugging calls that just do "made
it to this function!" and "leaving this function!" can be removed.
Better to use standard debugging tools.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210531073902.7111-4-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

{} braces are not needed over single if-statement.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210531073902.7111-3-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Now that the kernel has ftrace, any debugging calls that just do "made
it to this function!" and "leaving this function!" can be removed.
Better to use standard debugging tools.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210531073902.7111-2-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Remove standard module init/exit boilerplate with module_driver() which
also annotates the functions with __init.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210531073902.7111-1-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Correct block comments and usage of tab in function definition.  No
functional change.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210531073522.6720-4-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Use SPDX-License-Identifier: GPL-2.0-only, instead of hand writing it.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210531073522.6720-3-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Now that the kernel has ftrace, any debugging calls that just do "made
it to this function!" and "leaving this function!" can be removed.
Better to use standard debugging tools.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210531073522.6720-2-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Now that the kernel has ftrace, any debugging calls that just do "made
it to this function!" and "leaving this function!" can be removed.
Better to use standard debugging tools.

This allows also to remove several local variables and entire
fdp_nci_recv_frame() function (whose purpose was only to log).
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210531073522.6720-1-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Peter Geis says:

====================
fixes for yt8511 phy driver

The Intel clang bot caught a few uninitialized variables in the new
Motorcomm driver. While investigating the issue, it was found that the
driver would have unintended effects when used in an unsupported mode.

Fixed the uninitialized ret variable and abort loading the driver in
unsupported modes.
====================

Link: https://lore.kernel.org/r/20210529110556.202531-1-pgwipeout@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

While investigating the clang `ge` uninitialized variable report, it was
discovered the default switch would have unintended consequences. Due to
the switch to __phy_modify, the driver would modify the ID values in the
default scenario.

Fix this by promoting the interface mode switch and aborting when the
mode is not a supported RGMII mode.

This prevents the `ge` and `fe` variables from ever being used
uninitialized.

Fixes: 48e8c6f1 ("net: phy: add driver for Motorcomm yt8511 phy")
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Peter Geis <pgwipeout@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

clang doesn't preinitialize variables. If phy_select_page failed and
returned an error, phy_restore_page would be called with `ret` being
uninitialized.
Even though phy_restore_page won't use `ret` in this scenario,
initialize `ret` to silence the warning.

Fixes: 48e8c6f1 ("net: phy: add driver for Motorcomm yt8511 phy")
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Peter Geis <pgwipeout@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Yang Yingliang says:

====================
net: dsa: qca8k: check return value of read functions correctly

patch #1 - Change return type and add output parameter to make check
return value of read  functions correctly.

patch #2 - Add missing check return value in qca8k_phylink_mac_config().
====================

Link: https://lore.kernel.org/r/20210529030439.1723306-1-yangyingliang@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Now we can check qca8k_read() return value correctly, so if
it fails, we need return directly.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Current return type of qca8k_mii_read32() and qca8k_read() are
unsigned, it can't be negative, so the return value check is
unuseful. For check the return value correctly, change return
type of the read functions and add a output parameter to store
the read value.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning
by explicitly adding a break statement instead of letting the code fall
through to the next case.

Link: https://github.com/KSPP/linux/issues/115Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20210528202225.GA39855@embeddedorSigned-off-by: Jakub Kicinski <kuba@kernel.org>

In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple
warnings by explicitly adding a fallthrough statement instead of just
letting the code fall through to the next case.

Link: https://github.com/KSPP/linux/issues/115Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20210528195831.GA39131@embeddedorSigned-off-by: Jakub Kicinski <kuba@kernel.org>

George Cherian says:

====================
NPC KPU updates

Add support for
 - Loading Custom KPU profile entries
 - Add NPC profile Load from System Firmware DB
 - Add Support fo Coalescing KPU profiles
 - General Updates/Fixes to default KPU profile
====================

Link: https://lore.kernel.org/r/20210527094439.1910013-1-george.cherian@marvell.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Add support for parsing following
 1. NGIO
 2. PPPOE
 3. 24 byte custom L2 header
 4. CPT Header
 5. Fragmented CPT packets
 6. VLAN EXDSA

Fix for
 1. EDSA VLAN parsing
 2. Enhance FDSA
 3. CPT Header parsing

Remove ITAG support
Signed-off-by: Sunil Kovvuri Goutham <Sunil.Goutham@marvell.com>
Signed-off-by: Harman Kalra <hkalra@marvell.com>
Signed-off-by: Kiran Kumar K <kirankumark@marvell.com>
Signed-off-by: George Cherian <george.cherian@marvell.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Adding support to load a new type of KPU image, known as coalesced/
consolidated KPU image via firmware database. This image is a
consolidation of multiple KPU profiles into a single image.

During kernel bootup this coalesced image will be read via
firmware database and only the relevant KPU profile will be loaded.
Existing functionality of loading single KPU/MKEX profile
is intact as the images are differentiated based on the image signature.
Signed-off-by: Harman Kalra <hkalra@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <Sunil.Goutham@marvell.com>
Signed-off-by: George Cherian <george.cherian@marvell.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

CN10k introduces following new LT DEF registers:
1. APAD (alignment padding) LT DEF registers are
enhancement to existing apad calculation algorithm
where not just ipv4 and ipv6 but also other protocols
can be matched and required alignment can be added by NIX.

2. ET LT DEF register defines layer information in NPC_RESULT_S
to identify the Ethertype location in L2 header. Used for
Ethertype overwriting in inline IPsec flow.

This patch adds required structures and some header changes. Also
strict version check (based on minor field) is imposed to highlight
version mismatch between the kernel headers and KPU profile.
Signed-off-by: Harman Kalra <hkalra@marvell.com>
Signed-off-by: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
Signed-off-by: Kiran Kumar Kokkilagadda <kirankumark@marvell.com>
Signed-off-by: George Cherian <george.cherian@marvell.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Currently NPC profile (KPU + MKEX) can be loaded using firmware
binary in filesystem scheme. Enhancing the functionality to load
NPC profile image from system firmware database. It uses the same
technique as used for loading MKEX profile. Firstly firmware binary
in kernel is checked for a valid image else tries to load NPC profile
from firmware database and at last uses default profile if no proper
image found.
Signed-off-by: Harman Kalra <hkalra@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <Sunil.Goutham@marvell.com>
Signed-off-by: George Cherian <george.cherian@marvell.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Add ability to load a set of custom KPU entries. This
allows for flexible support for custom protocol parsing.

AF driver will attempt to load the profile and verify if it can fit
hardware capabilities. If not, it will revert to the built-in profile.

Next it will replace the first KPU_MAX_CST_LT (2) entries in each KPU
in default profile with entries read from the profile image.
The built-in profile should always contain KPU_MAX_CSR_LT first no-match
entries and AF driver will disable those in the KPU unless custom
profile is loaded.

Profile file contains also a list of default protocol overrides to
allow for custom protocols to be used there.
Signed-off-by: Stanislaw Kardach <skardach@marvell.com>
Signed-off-by: George Cherian <george.cherian@marvell.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Fix to return -EFAULT from the error handling case instead of 0, as done
elsewhere in this function.

By the way, when get_zeroed_page() fails, directly return -ENOMEM to
simplify code.

Fixes: 2c69448b ("ehea: DLPAR memory add fix")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20210528085555.9390-1-thunder.leizhen@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning
by explicitly adding a break statement instead of letting the code fall
through to the next case.

Link: https://github.com/KSPP/linux/issues/115Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Acked-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/20210528202327.GA39994@embeddedorSigned-off-by: Jakub Kicinski <kuba@kernel.org>

stmmac_mdio_register() has logic to search for PHYs on the MDIO bus and
assign them IRQ lines, as well as to set priv->plat->phy_addr.

If no PHY is found, the "found" variable remains set to 0 and the
function errors out.

After the introduction of commit f213bbe8 ("net: stmmac: Integrate
it with DesignWare XPCS"), the "found" variable was immediately reused
for searching for a PCS on the same MDIO bus.

This can result in 2 types of potential problems (none of them seems to
be seen on the only Intel system that sets has_xpcs = true, otherwise it
would have been reported):

1. If a PCS is found but a PHY is not, then the code happily exits with
   no error. One might say "yes, but this is not possible, because
   of_mdiobus_register will probe a PHY for all MDIO addresses,
   including for the XPCS, so if an XPCS exists, then a PHY certainly
   exists too". Well, that is not true, see intel_mgbe_common_data():

	/* Ensure mdio bus scan skips intel serdes and pcs-xpcs */
	plat->mdio_bus_data->phy_mask = 1 << INTEL_MGBE_ADHOC_ADDR;
	plat->mdio_bus_data->phy_mask |= 1 << INTEL_MGBE_XPCS_ADDR;

2. A PHY is found but an MDIO device with the XPCS PHY ID isn't, and in
   that case, the error message will be "No PHY found". Confusing.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20210527155959.3270478-1-olteanv@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The driver can match either via OF or ACPI ID tables.  If one
configuration is disabled, the table will be unused:

    drivers/nfc/st95hf/core.c:1059:34: warning:
        ‘st95hf_spi_of_match’ defined but not used [-Wunused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210528124200.79655-12-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The driver can match either via OF or ACPI ID tables.  If one
configuration is disabled, the table will be unused:

    drivers/nfc/st21nfca/i2c.c:593:34: warning:
        ‘of_st21nfca_i2c_match’ defined but not used [-Wunused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210528124200.79655-11-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The driver can match either via OF or ACPI ID tables.  If one
configuration is disabled, the table will be unused:

    drivers/nfc/st-nci/spi.c:296:34: warning:
        ‘of_st_nci_spi_match’ defined but not used [-Wunused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210528124200.79655-10-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The driver can match either via OF or ACPI ID tables.  If one
configuration is disabled, the table will be unused:

    drivers/nfc/pn544/i2c.c:53:36: warning:
        ‘pn544_hci_i2c_acpi_match’ defined but not used [-Wunused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210528124200.79655-9-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The driver can match either via OF or I2C ID tables.  If OF is disabled,
the table will be unused:

    drivers/nfc/s3fwrn5/i2c.c:265:34: warning:
        ‘of_s3fwrn5_i2c_match’ defined but not used [-Wunused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210528124200.79655-8-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The driver can match either via OF or I2C ID tables.  If OF is disabled,
the table will be unused:

    drivers/nfc/pn533/i2c.c:252:34: warning:
        ‘of_pn533_i2c_match’ defined but not used [-Wunused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210528124200.79655-7-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The nci_ctrl_hdr.plen field us u8, so checkign if it is bigger than
NCI_MAX_PAYLOAD_SIZE does not make any sense.  Fix warning reported by
Smatch:

    drivers/nfc/nfcmrvl/i2c.c:52 nfcmrvl_i2c_read() warn:
        impossible condition '(nci_hdr.plen > 255) => (0-255 > 255)'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210528124200.79655-6-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The driver can match either via OF or I2C ID tables.  If OF is disabled,
the table will be unused:

    drivers/nfc/nfcmrvl/spi.c:199:34: warning:
        ‘of_nfcmrvl_spi_match’ defined but not used [-Wunused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210528124200.79655-5-krzysztof.kozlowski@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>