lkml.org 
[lkml]   [2022]   [May]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v7 06/36] iommu/mediatek: Remove clk_disable in mtk_iommu_remove
Date
After the commit b34ea31fe013 ("iommu/mediatek: Always enable the clk on
resume"), the iommu clock is controlled by the runtime callback.
thus remove the clk control in the mtk_iommu_remove.

Otherwise, it will warning like:

echo 14018000.iommu > /sys/bus/platform/drivers/mtk-iommu/unbind

[ 51.413044] ------------[ cut here ]------------
[ 51.413648] vpp0_smi_iommu already disabled
[ 51.414233] WARNING: CPU: 2 PID: 157 at */v5.15-rc1/kernel/mediatek/
drivers/clk/clk.c:952 clk_core_disable+0xb0/0xb8
[ 51.417174] Hardware name: MT8195V/C(ENG) (DT)
[ 51.418635] pc : clk_core_disable+0xb0/0xb8
[ 51.419177] lr : clk_core_disable+0xb0/0xb8
...
[ 51.429375] Call trace:
[ 51.429694] clk_core_disable+0xb0/0xb8
[ 51.430193] clk_core_disable_lock+0x24/0x40
[ 51.430745] clk_disable+0x20/0x30
[ 51.431189] mtk_iommu_remove+0x58/0x118
[ 51.431705] platform_remove+0x28/0x60
[ 51.432197] device_release_driver_internal+0x110/0x1f0
[ 51.432873] device_driver_detach+0x18/0x28
[ 51.433418] unbind_store+0xd4/0x108
[ 51.433886] drv_attr_store+0x24/0x38
[ 51.434363] sysfs_kf_write+0x40/0x58
[ 51.434843] kernfs_fop_write_iter+0x164/0x1e0

Fixes: b34ea31fe013 ("iommu/mediatek: Always enable the clk on resume")
Reported-by: Hsin-Yi Wang <hsinyi@chromium.org>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
drivers/iommu/mtk_iommu.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index e4b4ebbcb73f..81b8db450eac 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -957,7 +957,6 @@ static int mtk_iommu_remove(struct platform_device *pdev)

list_del(&data->list);

- clk_disable_unprepare(data->bclk);
device_link_remove(data->smicomm_dev, &pdev->dev);
pm_runtime_disable(&pdev->dev);
devm_free_irq(&pdev->dev, data->irq, data);
--
2.18.0
\
 
 \ /
  Last update: 2022-05-03 09:17    [W:0.788 / U:0.516 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site