linux-stable.git/drivers/net, branch v5.4.85

net: stmmac: delete the eee_ctrl_timer after napi disabled

2020-12-21T12:27:05+00:00

[ Upstream commit 5f58591323bf3f342920179f24515935c4b5fd60 ]

There have chance to re-enable the eee_ctrl_timer and fire the timer
in napi callback after delete the timer in .stmmac_release(), which
introduces to access eee registers in the timer function after clocks
are disabled then causes system hang. Found this issue when do
suspend/resume and reboot stress test.

It is safe to delete the timer after napi disabled and disable lpi mode.

Fixes: d765955d2ae0b ("stmmac: add the Energy Efficient Ethernet support")
Signed-off-by: Fugang Duan 
Signed-off-by: Joakim Zhang 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

net: stmmac: dwmac-meson8b: fix mask definition of the m250_sel mux

2020-12-21T12:27:05+00:00

[ Upstream commit 82ca4c922b8992013a238d65cf4e60cc33e12f36 ]

The m250_sel mux clock uses bit 4 in the PRG_ETH0 register. Fix this by
shifting the PRG_ETH0_CLK_M250_SEL_MASK accordingly as the "mask" in
struct clk_mux expects the mask relative to the "shift" field in the
same struct.

While here, get rid of the PRG_ETH0_CLK_M250_SEL_SHIFT macro and use
__ffs() to determine it from the existing PRG_ETH0_CLK_M250_SEL_MASK
macro.

Fixes: 566e8251625304 ("net: stmmac: add a glue driver for the Amlogic Meson 8b / GXBB DWMAC")
Signed-off-by: Martin Blumenstingl 
Reviewed-by: Jerome Brunet 
Link: https://lore.kernel.org/r/20201205213207.519341-1-martin.blumenstingl@googlemail.com
Signed-off-by: Jakub Kicinski 
Signed-off-by: Greg Kroah-Hartman

net: ll_temac: Fix potential NULL dereference in temac_probe()

2020-12-21T12:27:05+00:00

[ Upstream commit cc6596fc7295e9dcd78156ed42f9f8e1221f7530 ]

platform_get_resource() may fail and in this case a NULL dereference
will occur.

Fix it to use devm_platform_ioremap_resource() instead of calling
platform_get_resource() and devm_ioremap().

This is detected by Coccinelle semantic patch.

@@
expression pdev, res, n, t, e, e1, e2;
@@

res = \(platform_get_resource\|platform_get_resource_byname\)(pdev, t, n);
+ if (!res)
+   return -EINVAL;
... when != res == NULL
e = devm_ioremap(e1, res->start, e2);

Fixes: 8425c41d1ef7 ("net: ll_temac: Extend support to non-device-tree platforms")
Signed-off-by: Zhang Changzhong 
Acked-by: Esben Haabendal 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

net/mlx4_en: Handle TX error CQE

2020-12-21T12:27:04+00:00

[ Upstream commit ba603d9d7b1215c72513d7c7aa02b6775fd4891b ]

In case error CQE was found while polling TX CQ, the QP is in error
state and all posted WQEs will generate error CQEs without any data
transmitted. Fix it by reopening the channels, via same method used for
TX timeout handling.

In addition add some more info on error CQE and WQE for debug.

Fixes: bd2f631d7c60 ("net/mlx4_en: Notify user when TX ring in error state")
Signed-off-by: Moshe Shemesh 
Signed-off-by: Tariq Toukan 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

lan743x: fix for potential NULL pointer dereference with bare card

2020-12-21T12:27:04+00:00

[ Upstream commit e9e13b6adc338be1eb88db87bcb392696144bd02 ]

This is the 3rd revision of the patch fix for potential null pointer dereference
with lan743x card.

The simpliest way to reproduce: boot with bare lan743x and issue "ethtool ethN"
commant where ethN is the interface with lan743x card. Example:

$ sudo ethtool eth7
dmesg:
[  103.510336] BUG: kernel NULL pointer dereference, address: 0000000000000340
...
[  103.510836] RIP: 0010:phy_ethtool_get_wol+0x5/0x30 [libphy]
...
[  103.511629] Call Trace:
[  103.511666]  lan743x_ethtool_get_wol+0x21/0x40 [lan743x]
[  103.511724]  dev_ethtool+0x1507/0x29d0
[  103.511769]  ? avc_has_extended_perms+0x17f/0x440
[  103.511820]  ? tomoyo_init_request_info+0x84/0x90
[  103.511870]  ? tomoyo_path_number_perm+0x68/0x1e0
[  103.511919]  ? tty_insert_flip_string_fixed_flag+0x82/0xe0
[  103.511973]  ? inet_ioctl+0x187/0x1d0
[  103.512016]  dev_ioctl+0xb5/0x560
[  103.512055]  sock_do_ioctl+0xa0/0x140
[  103.512098]  sock_ioctl+0x2cb/0x3c0
[  103.512139]  __x64_sys_ioctl+0x84/0xc0
[  103.512183]  do_syscall_64+0x33/0x80
[  103.512224]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  103.512274] RIP: 0033:0x7f54a9cba427
...

Previous versions can be found at:
v1:
initial version
    https://lkml.org/lkml/2020/10/28/921

v2:
do not return from lan743x_ethtool_set_wol if netdev->phydev == NULL, just skip
the call of phy_ethtool_set_wol() instead.
    https://lkml.org/lkml/2020/10/31/380

v3:
in function lan743x_ethtool_set_wol:
use ternary operator instead of if-else sentence (review by Markus Elfring)
return -ENETDOWN insted of -EIO (review by Andrew Lunn)

Signed-off-by: Sergej Bauer 

Link: https://lore.kernel.org/r/20201101223556.16116-1-sbauer@blackbox.su
Signed-off-by: Jakub Kicinski 
Signed-off-by: Greg Kroah-Hartman

net/mlx4_en: Avoid scheduling restart task if it is already running

2020-12-21T12:27:04+00:00

[ Upstream commit fed91613c9dd455dd154b22fa8e11b8526466082 ]

Add restarting state flag to avoid scheduling another restart task while
such task is already running. Change task name from watchdog_task to
restart_task to better fit the task role.

Fixes: 1e338db56e5a ("mlx4_en: Fix a race at restart task")
Signed-off-by: Moshe Shemesh 
Signed-off-by: Tariq Toukan 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

net: stmmac: free tx skb buffer in stmmac_resume()

2020-12-21T12:27:04+00:00

[ Upstream commit 4ec236c7c51f89abb0224a4da4a6b77f9beb6600 ]

When do suspend/resume test, there have WARN_ON() log dump from
stmmac_xmit() funciton, the code logic:
	entry = tx_q->cur_tx;
	first_entry = entry;
	WARN_ON(tx_q->tx_skbuff[first_entry]);

In normal case, tx_q->tx_skbuff[txq->cur_tx] should be NULL because
the skb should be handled and freed in stmmac_tx_clean().

But stmmac_resume() reset queue parameters like below, skb buffers
may not be freed.
	tx_q->cur_tx = 0;
	tx_q->dirty_tx = 0;

So free tx skb buffer in stmmac_resume() to avoid warning and
memory leak.

log:
[   46.139824] ------------[ cut here ]------------
[   46.144453] WARNING: CPU: 0 PID: 0 at drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:3235 stmmac_xmit+0x7a0/0x9d0
[   46.154969] Modules linked in: crct10dif_ce vvcam(O) flexcan can_dev
[   46.161328] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G           O      5.4.24-2.1.0+g2ad925d15481 #1
[   46.170369] Hardware name: NXP i.MX8MPlus EVK board (DT)
[   46.175677] pstate: 80000005 (Nzcv daif -PAN -UAO)
[   46.180465] pc : stmmac_xmit+0x7a0/0x9d0
[   46.184387] lr : dev_hard_start_xmit+0x94/0x158
[   46.188913] sp : ffff800010003cc0
[   46.192224] x29: ffff800010003cc0 x28: ffff000177e2a100
[   46.197533] x27: ffff000176ef0840 x26: ffff000176ef0090
[   46.202842] x25: 0000000000000000 x24: 0000000000000000
[   46.208151] x23: 0000000000000003 x22: ffff8000119ddd30
[   46.213460] x21: ffff00017636f000 x20: ffff000176ef0cc0
[   46.218769] x19: 0000000000000003 x18: 0000000000000000
[   46.224078] x17: 0000000000000000 x16: 0000000000000000
[   46.229386] x15: 0000000000000079 x14: 0000000000000000
[   46.234695] x13: 0000000000000003 x12: 0000000000000003
[   46.240003] x11: 0000000000000010 x10: 0000000000000010
[   46.245312] x9 : ffff00017002b140 x8 : 0000000000000000
[   46.250621] x7 : ffff00017636f000 x6 : 0000000000000010
[   46.255930] x5 : 0000000000000001 x4 : ffff000176ef0000
[   46.261238] x3 : 0000000000000003 x2 : 00000000ffffffff
[   46.266547] x1 : ffff000177e2a000 x0 : 0000000000000000
[   46.271856] Call trace:
[   46.274302]  stmmac_xmit+0x7a0/0x9d0
[   46.277874]  dev_hard_start_xmit+0x94/0x158
[   46.282056]  sch_direct_xmit+0x11c/0x338
[   46.285976]  __qdisc_run+0x118/0x5f0
[   46.289549]  net_tx_action+0x110/0x198
[   46.293297]  __do_softirq+0x120/0x23c
[   46.296958]  irq_exit+0xb8/0xd8
[   46.300098]  __handle_domain_irq+0x64/0xb8
[   46.304191]  gic_handle_irq+0x5c/0x148
[   46.307936]  el1_irq+0xb8/0x180
[   46.311076]  cpuidle_enter_state+0x84/0x360
[   46.315256]  cpuidle_enter+0x34/0x48
[   46.318829]  call_cpuidle+0x18/0x38
[   46.322314]  do_idle+0x1e0/0x280
[   46.325539]  cpu_startup_entry+0x24/0x40
[   46.329460]  rest_init+0xd4/0xe0
[   46.332687]  arch_call_rest_init+0xc/0x14
[   46.336695]  start_kernel+0x420/0x44c
[   46.340353] ---[ end trace bc1ee695123cbacd ]---

Fixes: 47dd7a540b8a0 ("net: add support for STMicroelectronics Ethernet controllers.")
Signed-off-by: Fugang Duan 
Signed-off-by: Joakim Zhang 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

enetc: Fix reporting of h/w packet counters

2020-12-21T12:27:04+00:00

[ Upstream commit eb96b686fc2c601e78903cc61b6cf4588ddde013 ]

Noticed some inconsistencies in packet statistics reporting.
This patch adds the missing Tx packet counter registers to
ethtool reporting and fixes the information strings for a
few of them.

Fixes: 16eb4c85c964 ("enetc: Add ethtool statistics")
Signed-off-by: Claudiu Manoil 
Link: https://lore.kernel.org/r/20201204171505.21389-1-claudiu.manoil@nxp.com
Signed-off-by: Jakub Kicinski 
Signed-off-by: Greg Kroah-Hartman

net: hns3: remove a misused pragma packed

2020-12-21T12:27:03+00:00

[ Upstream commit 61f54de2e9194f01874d5eda12037b0978e77519 ]

hclge_dbg_reg_info[] is defined as an array of packed structure
accidentally. However, this array contains pointers, which are
no longer aligned naturally, and cannot be relocated on PPC64.
Hence, when compile-testing this driver on PPC64 with
CONFIG_RELOCATABLE=y (e.g. PowerPC allyesconfig), there will be
some warnings.

Since each field in structure hclge_qos_pri_map_cmd and
hclge_dbg_bitmap_cmd is type u8, the pragma packed is unnecessary
for these two structures as well, so remove the pragma packed in
hclge_debugfs.h to fix this issue, and this increases
hclge_dbg_reg_info[] by 4 bytes per entry.

Fixes: a582b78dfc33 ("net: hns3: code optimization for debugfs related to "dump reg"")
Reported-by: Stephen Rothwell 
Signed-off-by: Huazhong Tan 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

vrf: packets with lladdr src needs dst at input with orig_iif when needs strict

2020-12-21T12:27:03+00:00

[ Upstream commit 205704c618af0ab2366015d2281a3b0814d918a0 ]

Depending on the order of the routes to fe80::/64 are installed on the
VRF table, the NS for the source link-local address of the originator
might be sent to the wrong interface.

This patch ensures that packets with link-local addr source is doing a
lookup with the orig_iif when the destination addr indicates that it
is strict.

Add the reproducer as a use case in self test script fcnal-test.sh.

Fixes: b4869aa2f881 ("net: vrf: ipv6 support for local traffic to local addresses")
Signed-off-by: Stephen Suryaputra 
Reviewed-by: David Ahern 
Link: https://lore.kernel.org/r/20201204030604.18828-1-ssuryaextr@gmail.com
Signed-off-by: Jakub Kicinski 
Signed-off-by: Greg Kroah-Hartman