scsi: ufs: pltfrm: Drop PM runtime reference count after ufshcd_remove()

BugLink: https://bugs.launchpad.net/bugs/2096827 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: [email protected] # 3.12 Fixes: 6269473 ("[SCSI] ufs: Add runtime PM support for UFS host controller driver") Signed-off-by: Manivannan Sadhasivam <[email protected]> Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Peter Wang <[email protected]> Reviewed-by: Bean Huo <[email protected]> Reviewed-by: Bart Van Assche <[email protected]> Signed-off-by: Martin K. Petersen <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> Signed-off-by: Koichiro Den <[email protected]>
tuxedocomputers · Feb 14, 2025 · 782d04c · 782d04c
1 parent 785a77c
commit 782d04c
Show file tree

Hide file tree

Showing 6 changed files with 2 additions and 5 deletions.
diff --git 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(struct platform_device *pdev)
  */
 static void tc_dwc_g210_pltfm_remove(struct platform_device *pdev)
 {
-	pm_runtime_get_sync(&(pdev)->dev);
 	ufshcd_pltfrm_remove(pdev);
 }
 

diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c
@@ -1963,7 +1963,6 @@ static void exynos_ufs_remove(struct platform_device *pdev)
 	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);

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
@@ -1869,7 +1869,6 @@ static int ufs_mtk_probe(struct platform_device *pdev)
  */
 static void ufs_mtk_remove(struct platform_device *pdev)
 {
-	pm_runtime_get_sync(&(pdev)->dev);
 	ufshcd_pltfrm_remove(pdev);
 }
 

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
@@ -1845,7 +1845,6 @@ static void ufs_qcom_remove(struct platform_device *pdev)
 	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);

diff --git a/drivers/ufs/host/ufs-sprd.c b/drivers/ufs/host/ufs-sprd.c
@@ -427,7 +427,6 @@ static int ufs_sprd_probe(struct platform_device *pdev)
 
 static void ufs_sprd_remove(struct platform_device *pdev)
 {
-	pm_runtime_get_sync(&(pdev)->dev);
 	ufshcd_pltfrm_remove(pdev);
 }
 

diff --git a/drivers/ufs/host/ufshcd-pltfrm.c b/drivers/ufs/host/ufshcd-pltfrm.c
@@ -536,8 +536,10 @@ void ufshcd_pltfrm_remove(struct platform_device *pdev)
 {
 	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);
-Original file line number
+Diff line change
@@ Expand Up @@
      */
     static void tc_dwc_g210_pltfm_remove(struct platform_device *pdev)
     {
-    	pm_runtime_get_sync(&(pdev)->dev);
     	ufshcd_pltfrm_remove(pdev);
     }
@@ Expand Down @@