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fd42798fea
No manual changes needed.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
(cherry picked from commit 1fbe41f489)
117 lines
4.0 KiB
Diff
117 lines
4.0 KiB
Diff
From 1f15b5e8733115cee65342bcaafeaf0368809fae Mon Sep 17 00:00:00 2001
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From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
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Date: Mon, 25 Apr 2022 22:28:02 +0100
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Subject: [PATCH 10/13] net: dsa: mt753x: fix pcs conversion regression
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Daniel Golle reports that the conversion of mt753x to phylink PCS caused
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an oops as below.
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The problem is with the placement of the PCS initialisation, which
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occurs after mt7531_setup() has been called. However, burited in this
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function is a call to setup the CPU port, which requires the PCS
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structure to be already setup.
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Fix this by changing the initialisation order.
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Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020
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Mem abort info:
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ESR = 0x96000005
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EC = 0x25: DABT (current EL), IL = 32 bits
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SET = 0, FnV = 0
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EA = 0, S1PTW = 0
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FSC = 0x05: level 1 translation fault
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Data abort info:
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ISV = 0, ISS = 0x00000005
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CM = 0, WnR = 0
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user pgtable: 4k pages, 39-bit VAs, pgdp=0000000046057000
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[0000000000000020] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000
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Internal error: Oops: 96000005 [#1] SMP
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Modules linked in:
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CPU: 0 PID: 32 Comm: kworker/u4:1 Tainted: G S 5.18.0-rc3-next-20220422+ #0
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Hardware name: Bananapi BPI-R64 (DT)
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Workqueue: events_unbound deferred_probe_work_func
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pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
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pc : mt7531_cpu_port_config+0xcc/0x1b0
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lr : mt7531_cpu_port_config+0xc0/0x1b0
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sp : ffffffc008d5b980
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x29: ffffffc008d5b990 x28: ffffff80060562c8 x27: 00000000f805633b
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x26: ffffff80001a8880 x25: 00000000000009c4 x24: 0000000000000016
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x23: ffffff8005eb6470 x22: 0000000000003600 x21: ffffff8006948080
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x20: 0000000000000000 x19: 0000000000000006 x18: 0000000000000000
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x17: 0000000000000001 x16: 0000000000000001 x15: 02963607fcee069e
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x14: 0000000000000000 x13: 0000000000000030 x12: 0101010101010101
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x11: ffffffc037302000 x10: 0000000000000870 x9 : ffffffc008d5b800
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x8 : ffffff800028f950 x7 : 0000000000000001 x6 : 00000000662b3000
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x5 : 00000000000002f0 x4 : 0000000000000000 x3 : ffffff800028f080
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x2 : 0000000000000000 x1 : ffffff800028f080 x0 : 0000000000000000
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Call trace:
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mt7531_cpu_port_config+0xcc/0x1b0
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mt753x_cpu_port_enable+0x24/0x1f0
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mt7531_setup+0x49c/0x5c0
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mt753x_setup+0x20/0x31c
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dsa_register_switch+0x8bc/0x1020
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mt7530_probe+0x118/0x200
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mdio_probe+0x30/0x64
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really_probe.part.0+0x98/0x280
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__driver_probe_device+0x94/0x140
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driver_probe_device+0x40/0x114
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__device_attach_driver+0xb0/0x10c
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bus_for_each_drv+0x64/0xa0
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__device_attach+0xa8/0x16c
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device_initial_probe+0x10/0x20
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bus_probe_device+0x94/0x9c
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deferred_probe_work_func+0x80/0xb4
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process_one_work+0x200/0x3a0
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worker_thread+0x260/0x4c0
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kthread+0xd4/0xe0
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ret_from_fork+0x10/0x20
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Code: 9409e911 937b7e60 8b0002a0 f9405800 (f9401005)
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---[ end trace 0000000000000000 ]---
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Reported-by: Daniel Golle <daniel@makrotopia.org>
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Tested-by: Daniel Golle <daniel@makrotopia.org>
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Fixes: cbd1f243bc41 ("net: dsa: mt7530: partially convert to phylink_pcs")
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Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
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Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
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Link: https://lore.kernel.org/r/E1nj6FW-007WZB-5Y@rmk-PC.armlinux.org.uk
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Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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---
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drivers/net/dsa/mt7530.c | 18 +++++++++---------
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1 file changed, 9 insertions(+), 9 deletions(-)
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--- a/drivers/net/dsa/mt7530.c
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+++ b/drivers/net/dsa/mt7530.c
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@@ -3304,9 +3304,16 @@ static int
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mt753x_setup(struct dsa_switch *ds)
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{
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struct mt7530_priv *priv = ds->priv;
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- int ret = priv->info->sw_setup(ds);
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- int i;
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+ int i, ret;
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+ /* Initialise the PCS devices */
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+ for (i = 0; i < priv->ds->num_ports; i++) {
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+ priv->pcs[i].pcs.ops = priv->info->pcs_ops;
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+ priv->pcs[i].priv = priv;
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+ priv->pcs[i].port = i;
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+ }
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+
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+ ret = priv->info->sw_setup(ds);
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if (ret)
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return ret;
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@@ -3318,13 +3325,6 @@ mt753x_setup(struct dsa_switch *ds)
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if (ret && priv->irq)
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mt7530_free_irq_common(priv);
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- /* Initialise the PCS devices */
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- for (i = 0; i < priv->ds->num_ports; i++) {
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- priv->pcs[i].pcs.ops = priv->info->pcs_ops;
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- priv->pcs[i].priv = priv;
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- priv->pcs[i].port = i;
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- }
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-
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return ret;
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}
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