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Date: Thu, 7 Apr 2022 15:55:35 -0700
From: Florian Fainelli <f.fainelli@...il.com>
To: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Cc: Andrew Lunn <andrew@...n.ch>,
Vivien Didelot <vivien.didelot@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org
Subject: Re: [PATCH RFC net-next] net: dsa: b53: convert to phylink_pcs
On 4/6/22 08:06, Russell King (Oracle) wrote:
> Convert B53 to use phylink_pcs for the serdes rather than hooking it
> into the MAC-layer callbacks.
>
> Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
> ---
> Hi Florian,
>
> Please can you test this patch? Thanks.
Did not spend much time debugging this as I had to do something else but
here is what I got:
[ 1.909223] b53-srab-switch 18036000.ethernet-switch: SerDes lane 0,
model: 1, rev B0 (OUI: 0x0143bff0)
[ 1.918956] 8<--- cut here ---
[ 1.922119] Unable to handle kernel NULL pointer dereference at
virtual address 0000012c
[ 1.930473] [0000012c] *pgd=00000000
[ 1.934177] Internal error: Oops: 805 [#1] SMP ARM
[ 1.939124] Modules linked in:
[ 1.942277] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.18.0-rc1 #8
[ 1.948744] Hardware name: Broadcom Northstar Plus SoC
[ 1.954041] PC is at b53_serdes_init+0x1d8/0x1e0
[ 1.958815] LR is at _printk_rb_static_descs+0x0/0x6000
[ 1.964218] pc : [<c0851e08>] lr : [<c1b425d8>] psr: 60000013
[ 1.970678] sp : e0821d08 ip : 00005ff4 fp : e0821d3c
[ 1.976064] r10: c102d3cc r9 : c0d6a628 r8 : 00000143
[ 1.981448] r7 : 0000012c r6 : 00004281 r5 : 00000000 r4 : c4636b40
[ 1.988177] r3 : c0d6b4ac r2 : 00000000 r1 : 0000003c r0 : 00000000
[ 1.994906] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM
Segment none
[ 2.002273] Control: 10c5387d Table: 6000404a DAC: 00000051
[ 2.008195] Register r0 information: NULL pointer
[ 2.013050] Register r1 information: non-paged memory
[ 2.018265] Register r2 information: NULL pointer
[ 2.023112] Register r3 information: non-slab/vmalloc memory
[ 2.028955] Register r4 information: slab kmalloc-256 start c4636b00
pointer offset 64 size 256
[ 2.037941] Register r5 information: NULL pointer
[ 2.042789] Register r6 information: non-paged memory
[ 2.048004] Register r7 information: non-paged memory
[ 2.053218] Register r8 information: non-paged memory
[ 2.058424] Register r9 information: non-slab/vmalloc memory
[ 2.064266] Register r10 information: non-slab/vmalloc memory
[ 2.070198] Register r11 information: 2-page vmalloc region starting
at 0xe0820000 allocated at kernel_clone+0xa4/0x3d8
[ 2.081335] Register r12 information: non-paged memory
[ 2.086639] Process swapper/0 (pid: 1, stack limit = 0x(ptrval))
[ 2.092840] Stack: (0xe0821d08 to 0xe0822000)
[ 2.097340] 1d00: 00000042 00000000 0143bff0
c05d689c e0821d3c c4636b40
[ 2.105782] 1d20: c4636a40 00000005 c4636b40 c4636a40 e0821d74
e0821d40 c0851128 c0851c3c
[ 2.114222] 1d40: c0f9a998 c21abc10 c0761620 00000000 c21abc10
c1bec070 c1c3b528 00000000
[ 2.122662] 1d60: c1157854 c1c4f000 e0821d94 e0821d78 c0747708
c0850ed8 00000000 c21abc10
[ 2.131103] 1d80: c1bec070 c1c3b528 e0821dbc e0821d98 c07446ec
c07476a8 c07551f0 c0753e00
[ 2.139542] 1da0: c21abc10 c1bec070 c1c3b528 c21abc10 e0821dec
e0821dc0 c0744a38 c0744594
[ 2.147982] 1dc0: c21abc10 c1bec070 c1c83288 c1c8328c c1bec070
c21abc10 00000000 c1157854
[ 2.156423] 1de0: e0821e14 e0821df0 c0744be0 c0744994 c21abc10
c21abc54 c1bec070 c1bd7910
[ 2.164863] 1e00: 00000000 c1157854 e0821e34 e0821e18 c074545c
c0744ba8 00000000 c1bec070
[ 2.173303] 1e20: c0745364 c1bd7910 e0821e64 e0821e38 c07421d4
c0745370 00000000 c2128c58
[ 2.181744] 1e40: c216d134 32ea7446 e0821e74 c1bec070 c45f2700
00000000 e0821e74 e0821e68
[ 2.190185] 1e60: c074400c c074215c e0821e9c e0821e78 c07438e8
c0743fec c102d3e0 c0652620
[ 2.198624] 1e80: c1bec070 00000000 00000007 c2180000 e0821eb4
e0821ea0 c07460b0 c0743774
[ 2.207065] 1ea0: c1c2bb40 c112d33c e0821ec4 e0821eb8 c074736c
c0746024 e0821ed4 e0821ec8
[ 2.215506] 1ec0: c112d360 c074734c e0821f4c e0821ed8 c0102300
c112d348 c0fa28d8 c0fa28b8
[ 2.223946] 1ee0: c0fa2904 c0fbaf00 00000000 c0fa2894 00000006
00000006 c1c36440 c11005cc
[ 2.232386] 1f00: c1046b18 00000000 0000011c 00000000 c1101554
c20d9fd2 c20d9fdd 32ea7446
[ 2.240826] 1f20: c018bd80 32ea7446 c20d9f80 c1190248 c20d9f80
00000007 c1157834 0000011c
[ 2.249267] 1f40: e0821f94 e0821f50 c110161c c01022b4 00000006
00000006 00000000 c11005cc
[ 2.257707] 1f60: c10eda18 c11005cc 00000000 c1b04d00 c0c9bf20
00000000 00000000 00000000
[ 2.266147] 1f80: 00000000 00000000 e0821fac e0821f98 c0c9bf48
c1101454 00000000 c0c9bf20
[ 2.274588] 1fa0: 00000000 e0821fb0 c0100148 c0c9bf2c 00000000
00000000 00000000 00000000
[ 2.283027] 1fc0: 00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
[ 2.291467] 1fe0: 00000000 00000000 00000000 00000000 00000013
00000000 00000000 00000000
[ 2.299905] Backtrace:
[ 2.302423] b53_serdes_init from b53_srab_probe+0x25c/0x2b0
[ 2.308269] r8:c4636a40 r7:c4636b40 r6:00000005 r5:c4636a40 r4:c4636b40
[ 2.315181] b53_srab_probe from platform_probe+0x6c/0xcc
[ 2.320759] r10:c1c4f000 r9:c1157854 r8:00000000 r7:c1c3b528
r6:c1bec070 r5:c21abc10
[ 2.328837] r4:00000000
[ 2.331445] platform_probe from really_probe+0x164/0x400
[ 2.337029] r7:c1c3b528 r6:c1bec070 r5:c21abc10 r4:00000000
[ 2.342868] really_probe from __driver_probe_device+0xb0/0x214
[ 2.348982] r7:c21abc10 r6:c1c3b528 r5:c1bec070 r4:c21abc10
[ 2.354821] __driver_probe_device from driver_probe_device+0x44/0xd4
[ 2.361473] r9:c1157854 r8:00000000 r7:c21abc10 r6:c1bec070
r5:c1c8328c r4:c1c83288
[ 2.369462] driver_probe_device from __driver_attach+0xf8/0x1dc
[ 2.375666] r9:c1157854 r8:00000000 r7:c1bd7910 r6:c1bec070
r5:c21abc54 r4:c21abc10
[ 2.383654] __driver_attach from bus_for_each_dev+0x84/0xd0
[ 2.389498] r7:c1bd7910 r6:c0745364 r5:c1bec070 r4:00000000
[ 2.395329] bus_for_each_dev from driver_attach+0x2c/0x30
[ 2.400993] r6:00000000 r5:c45f2700 r4:c1bec070
[ 2.405749] driver_attach from bus_add_driver+0x180/0x21c
[ 2.411412] bus_add_driver from driver_register+0x98/0x128
[ 2.417167] r7:c2180000 r6:00000007 r5:00000000 r4:c1bec070
[ 2.423007] driver_register from __platform_driver_register+0x2c/0x34
[ 2.429746] r5:c112d33c r4:c1c2bb40
[ 2.433427] __platform_driver_register from
b53_srab_driver_init+0x24/0x28
[ 2.440622] b53_srab_driver_init from do_one_initcall+0x58/0x210
[ 2.446920] do_one_initcall from kernel_init_freeable+0x1d4/0x230
[ 2.453313] r8:0000011c r7:c1157834 r6:00000007 r5:c20d9f80 r4:c1190248
[ 2.460227] kernel_init_freeable from kernel_init+0x28/0x140
[ 2.466170] r10:00000000 r9:00000000 r8:00000000 r7:00000000
r6:00000000 r5:c0c9bf20
[ 2.474249] r4:c1b04d00
[ 2.476857] kernel_init from ret_from_fork+0x14/0x2c
[ 2.482070] Exception stack(0xe0821fb0 to 0xe0821ff8)
[ 2.487279] 1fa0: 00000000
00000000 00000000 00000000
[ 2.495720] 1fc0: 00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
[ 2.504160] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 2.510986] r5:c0c9bf20 r4:00000000
[ 2.514671] Code: e30b34ac e34c30d6 e0070791 e3a00000 (e7823007)
[ 2.520987] ---[ end trace 0000000000000000 ]---
--
Florian
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