| Message ID | 20241107121215.5201-1-andy-ld.lu@mediatek.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] mmc: mtk-sd: Fix error handle of probe function | expand |
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>
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index a2750a45c1b7..022526a1f754 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -3007,7 +3007,7 @@ static int msdc_drv_probe(struct platform_device *pdev) ret = msdc_ungate_clock(host); if (ret) { dev_err(&pdev->dev, "Cannot ungate clocks!\n"); - goto release_mem; + goto release_clk; } msdc_init_hw(host); @@ -3017,14 +3017,14 @@ static int msdc_drv_probe(struct platform_device *pdev) GFP_KERNEL); if (!host->cq_host) { ret = -ENOMEM; - goto release_mem; + goto release; } host->cq_host->caps |= CQHCI_TASK_DESC_SZ_128; host->cq_host->mmio = host->base + 0x800; host->cq_host->ops = &msdc_cmdq_ops; ret = cqhci_init(host->cq_host, mmc, true); if (ret) - goto release_mem; + goto release; mmc->max_segs = 128; /* cqhci 16bit length */ /* 0 size, means 65536 so we don't have to -1 here */ @@ -3064,9 +3064,10 @@ static int msdc_drv_probe(struct platform_device *pdev) end: pm_runtime_disable(host->dev); release: - platform_set_drvdata(pdev, NULL); msdc_deinit_hw(host); +release_clk: msdc_gate_clock(host); + platform_set_drvdata(pdev, NULL); release_mem: if (host->dma.gpd) dma_free_coherent(&pdev->dev,
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> --- Changes in v2: - Add the relevant fixes tags. --- drivers/mmc/host/mtk-sd.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-)