6.12-stable review patch. If anyone has any objections, please let me know.
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From: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org
commit 1745dcdb7227102e16248a324c600b9121c8f6df upstream.
During the remove stage of glue drivers, some of them are incrementing the reference count using pm_runtime_get_sync(), before removing the ufshcd using ufshcd_remove(). But they are not dropping that reference count after ufshcd_remove() to balance the refcount.
So drop the reference count by calling pm_runtime_put_noidle() after ufshcd_remove(). Since the behavior is applicable to all glue drivers, move the PM handling to ufshcd_pltfrm_remove().
Cc: stable@vger.kernel.org # 3.12 Fixes: 62694735ca95 ("[SCSI] ufs: Add runtime PM support for UFS host controller driver") Signed-off-by: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org Link: https://lore.kernel.org/r/20241111-ufs_bug_fix-v1-4-45ad8b62f02e@linaro.org Reviewed-by: Peter Wang peter.wang@mediatek.com Reviewed-by: Bean Huo beanhuo@micron.com Reviewed-by: Bart Van Assche bvanassche@acm.org Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/ufs/host/tc-dwc-g210-pltfrm.c | 1 - drivers/ufs/host/ufs-exynos.c | 1 - drivers/ufs/host/ufs-mediatek.c | 1 - drivers/ufs/host/ufs-qcom.c | 1 - drivers/ufs/host/ufs-sprd.c | 1 - drivers/ufs/host/ufshcd-pltfrm.c | 2 ++ 6 files changed, 2 insertions(+), 5 deletions(-)
--- a/drivers/ufs/host/tc-dwc-g210-pltfrm.c +++ b/drivers/ufs/host/tc-dwc-g210-pltfrm.c @@ -76,7 +76,6 @@ static int tc_dwc_g210_pltfm_probe(struc */ static void tc_dwc_g210_pltfm_remove(struct platform_device *pdev) { - pm_runtime_get_sync(&(pdev)->dev); ufshcd_pltfrm_remove(pdev); }
--- a/drivers/ufs/host/ufs-exynos.c +++ b/drivers/ufs/host/ufs-exynos.c @@ -1963,7 +1963,6 @@ static void exynos_ufs_remove(struct pla struct ufs_hba *hba = platform_get_drvdata(pdev); struct exynos_ufs *ufs = ufshcd_get_variant(hba);
- pm_runtime_get_sync(&(pdev)->dev); ufshcd_pltfrm_remove(pdev);
phy_power_off(ufs->phy); --- a/drivers/ufs/host/ufs-mediatek.c +++ b/drivers/ufs/host/ufs-mediatek.c @@ -1869,7 +1869,6 @@ out: */ static void ufs_mtk_remove(struct platform_device *pdev) { - pm_runtime_get_sync(&(pdev)->dev); ufshcd_pltfrm_remove(pdev); }
--- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -1845,7 +1845,6 @@ static void ufs_qcom_remove(struct platf struct ufs_hba *hba = platform_get_drvdata(pdev); struct ufs_qcom_host *host = ufshcd_get_variant(hba);
- pm_runtime_get_sync(&(pdev)->dev); ufshcd_pltfrm_remove(pdev); if (host->esi_enabled) platform_device_msi_free_irqs_all(hba->dev); --- a/drivers/ufs/host/ufs-sprd.c +++ b/drivers/ufs/host/ufs-sprd.c @@ -427,7 +427,6 @@ static int ufs_sprd_probe(struct platfor
static void ufs_sprd_remove(struct platform_device *pdev) { - pm_runtime_get_sync(&(pdev)->dev); ufshcd_pltfrm_remove(pdev); }
--- a/drivers/ufs/host/ufshcd-pltfrm.c +++ b/drivers/ufs/host/ufshcd-pltfrm.c @@ -532,8 +532,10 @@ void ufshcd_pltfrm_remove(struct platfor { struct ufs_hba *hba = platform_get_drvdata(pdev);
+ pm_runtime_get_sync(&pdev->dev); ufshcd_remove(hba); pm_runtime_disable(&pdev->dev); + pm_runtime_put_noidle(&pdev->dev); } EXPORT_SYMBOL_GPL(ufshcd_pltfrm_remove);