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Message-ID: <20241107014714.24981-1-andy-ld.lu@mediatek.com>
Date: Thu, 7 Nov 2024 09:47:07 +0800
From: Andy-ld Lu <andy-ld.lu@...iatek.com>
To: <angelogioacchino.delregno@...labora.com>, <ulf.hansson@...aro.org>,
<matthias.bgg@...il.com>, <wenbin.mei@...iatek.com>
CC: <linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>,
Andy-ld Lu <andy-ld.lu@...iatek.com>
Subject: [PATCH] mmc: mtk-sd: Fix error handle of probe function
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@...iatek.com>
---
drivers/mmc/host/mtk-sd.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
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,
--
2.46.0
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