[PATCH v3 04/33] iommu/mediatek: Remove clk_disable in mtk_iommu_remove
AngeloGioacchino Del Regno
angelogioacchino.delregno at collabora.com
Tue Jan 4 07:55:10 PST 2022
Il 23/09/21 13:58, Yong Wu ha scritto:
> 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 at chromium.org>
> Signed-off-by: Yong Wu <yong.wu at mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
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