Re: [PATCH v6 7/7] arm64: dts: renesas: r8a779f0: spider-cpu: Enable UFS device

[Wolfram Sang <wsa@kernel.org>]

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Hi Avri, all,

> > [    0.449917] ufshcd-renesas e6860000.ufs: ufshcd_query_attr: opcode 0x03
> > for idn 1 failed, index 0, err = 253
> > [    0.452035] ufshcd-renesas e6860000.ufs: ufshcd_query_attr: opcode 0x03
> > for idn 1 failed, index 0, err = 253
> > [    0.453859] ufshcd-renesas e6860000.ufs: ufshcd_query_attr: opcode 0x03
> > for idn 1 failed, index 0, err = 253
> > [    0.453874] ufshcd-renesas e6860000.ufs: ufshcd_query_attr_retry: query
> > attribute, idn 1, failed with error 253 after 3 retires
> Should be interesting to find out who is trying to read an undefined (reserved) attribute in your system.

So, the call trace is:

[    0.455361] Call trace:
[    0.455521]  ufshcd_query_attr_retry+0x68/0xb0
[    0.455808]  ufshpb_get_dev_info+0x80/0x110
[    0.456083]  ufshcd_probe_hba+0xce0/0x10d0
[    0.456349]  ufshcd_async_scan+0x34/0x310
[    0.456609]  async_run_entry_fn+0x34/0x130
[    0.456873]  process_one_work+0x1e4/0x434
[    0.457136]  worker_thread+0x174/0x4dc
[    0.457379]  kthread+0xdc/0xe0
[    0.457580]  ret_from_fork+0x10/0x20

which leads me to this call in ufshpb_get_dev_info():

2622         ret = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR,
2623                 QUERY_ATTR_IDN_MAX_HPB_SINGLE_CMD, 0, 0, &max_single_cmd);

And from here on, I miss the UFS experience to debug further. But I will
happily provide more information if people give me pointers.

All the best,

   Wolfram

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