FAILED: patch "[PATCH] mmc: mtk-sd: Fix error handle of probe function" failed to apply to 6.6-stable tree

FAILED: patch "[PATCH] mmc: mtk-sd: Fix error handle of probe function" failed to apply to 6.6-stable tree

[gregkh]

The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x 291220451c775a054cedc4fab4578a1419eb6256
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2024120628-radiator-underwire-a0d9@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 291220451c775a054cedc4fab4578a1419eb6256 Mon Sep 17 00:00:00 2001
From: Andy-ld Lu <andy-ld.lu@mediatek.com>
Date: Thu, 7 Nov 2024 20:11:21 +0800
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.

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>
Cc: stable@vger.kernel.org
Message-ID: <20241107121215.5201-1-andy-ld.lu@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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,

[PATCH 6.6.y] mmc: mtk-sd: Fix error handle of probe function

[Andy-ld Lu]

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")
Signed-off-by: Andy-ld Lu <andy-ld.lu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: stable@vger.kernel.org
Message-ID: <20241107121215.5201-1-andy-ld.lu@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit 291220451c775a054cedc4fab4578a1419eb6256)
---
 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 8b755f162732..bafd020f234a 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -2823,7 +2823,7 @@ 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);
 
@@ -2833,14 +2833,14 @@ static int msdc_drv_probe(struct platform_device *pdev)
 					     GFP_KERNEL);
 		if (!host->cq_host) {
 			ret = -ENOMEM;
-			goto host_free;
+			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 host_free;
+			goto release;
 		mmc->max_segs = 128;
 		/* cqhci 16bit length */
 		/* 0 size, means 65536 so we don't have to -1 here */
@@ -2867,9 +2867,10 @@ 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

Re: [PATCH 6.6.y] mmc: mtk-sd: Fix error handle of probe function

[Sasha Levin]

[ Sasha's backport helper bot ]

Hi,

Found matching upstream commit: 291220451c775a054cedc4fab4578a1419eb6256


Status in newer kernel trees:
6.12.y | Present (different SHA1: da15282c09f8)
6.6.y | Present (different SHA1: 359c7e5ed332)

Note: The patch differs from the upstream commit:
---
1:  291220451c775 ! 1:  5a73d6712ce59 mmc: mtk-sd: Fix error handle of probe function
    @@ Commit message
         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>
         Cc: stable@vger.kernel.org
         Message-ID: <20241107121215.5201-1-andy-ld.lu@mediatek.com>
         Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
    +    (cherry picked from commit 291220451c775a054cedc4fab4578a1419eb6256)
     
      ## drivers/mmc/host/mtk-sd.c ##
     @@ drivers/mmc/host/mtk-sd.c: static int msdc_drv_probe(struct platform_device *pdev)
    @@ drivers/mmc/host/mtk-sd.c: static int msdc_drv_probe(struct platform_device *pde
      					     GFP_KERNEL);
      		if (!host->cq_host) {
      			ret = -ENOMEM;
    --			goto release_mem;
    +-			goto host_free;
     +			goto release;
      		}
      		host->cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
    @@ drivers/mmc/host/mtk-sd.c: static int msdc_drv_probe(struct platform_device *pde
      		host->cq_host->ops = &msdc_cmdq_ops;
      		ret = cqhci_init(host->cq_host, mmc, true);
      		if (ret)
    --			goto release_mem;
    +-			goto host_free;
     +			goto release;
      		mmc->max_segs = 128;
      		/* cqhci 16bit length */
---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-6.6.y        |  Success    |  Success   |