Re: [PATCH] mmc: mtk-sd: Fix error handle of probe function

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Il 07/11/24 02:47, Andy-ld Lu ha scritto:
In the probe function, it goes to 'release_mem' label and returns after
some procedure failure. But if the clocks (partial or all) have been
enabled previously, they would not be disabled in msdc_runtime_suspend,
since runtime PM is not yet enabled for this case.

That cause mmc related clocks always on during system suspend and block
suspend flow. Below log is from a SDCard issue of MT8196 chromebook, it
returns -ETIMEOUT while polling clock stable in the msdc_ungate_clock()
and probe failed, but the enabled clocks could not be disabled anyway.

[  129.059253] clk_chk_dev_pm_suspend()
[  129.350119] suspend warning: msdcpll is on
[  129.354494] [ck_msdc30_1_sel : enabled, 1, 1, 191999939,   ck_msdcpll_d2]
[  129.362787] [ck_msdcpll_d2   : enabled, 1, 1, 191999939,         msdcpll]
[  129.371041] [ck_msdc30_1_ck  : enabled, 1, 1, 191999939, ck_msdc30_1_sel]
[  129.379295] [msdcpll         : enabled, 1, 1, 383999878,          clk26m]

Add a new 'release_clk' label and reorder the error handle functions to
make sure the clocks be disabled after probe failure.

Signed-off-by: Andy-ld Lu <andy-ld.lu@xxxxxxxxxxxx>

Please add the relevant Fixes tag, as this is a fix and should be backported.

After which, I'll give you my R-b.

Cheers,
Angelo





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