Re: [PATCH v2] mmc: mtk-sd: Fix error handle of probe function

[AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>]

Il 07/11/24 13:11, 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.
> 
> Fixes: ffaea6ebfe9c ("mmc: mtk-sd: Use readl_poll_timeout instead of open-coded polling")
> Fixes: 7a2fa8eed936 ("mmc: mtk-sd: use devm_mmc_alloc_host")
> Signed-off-by: Andy-ld Lu <andy-ld.lu@mediatek.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>