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  3. [PATCH 0/4] scsi: ufs: ufs-qcom: Debug clean ups
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[PATCH 3/4] scsi: ufs: ufs-qcom: Remove usage of dbg_print_en

Andrew Halaney posted 4 patches 3 years, 2 months ago
[PATCH 3/4] scsi: ufs: ufs-qcom: Remove usage of dbg_print_en
Posted by Andrew Halaney 3 years, 2 months ago 
This bitmask is unconditionally set in the current driver,
so all conditionals using it can be considered bit rot.

Let's take the current default conditional path everywhere and remove
dbg_print_en from the driver.

Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
---
 drivers/ufs/host/ufs-qcom.c | 18 +++---------------
 drivers/ufs/host/ufs-qcom.h | 11 -----------
 2 files changed, 3 insertions(+), 26 deletions(-)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 1b0dfbbdcdf3..b1fcff1fad0c 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -22,9 +22,6 @@
 #include <ufs/ufshci.h>
 #include <ufs/ufs_quirks.h>
 
-#define UFS_QCOM_DEFAULT_DBG_PRINT_EN	\
-	(UFS_QCOM_DBG_PRINT_REGS_EN | UFS_QCOM_DBG_PRINT_TEST_BUS_EN)
-
 enum {
 	TSTBUS_UAWM,
 	TSTBUS_UARM,
@@ -1040,7 +1037,6 @@ static int ufs_qcom_init(struct ufs_hba *hba)
 	if (hba->dev->id < MAX_UFS_QCOM_HOSTS)
 		ufs_qcom_hosts[hba->dev->id] = host;
 
-	host->dbg_print_en |= UFS_QCOM_DEFAULT_DBG_PRINT_EN;
 	ufs_qcom_get_default_testbus_cfg(host);
 	err = ufs_qcom_testbus_config(host);
 	if (err) {
@@ -1191,14 +1187,9 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
 
 static void ufs_qcom_enable_test_bus(struct ufs_qcom_host *host)
 {
-	if (host->dbg_print_en & UFS_QCOM_DBG_PRINT_TEST_BUS_EN) {
-		ufshcd_rmwl(host->hba, UFS_REG_TEST_BUS_EN,
-				UFS_REG_TEST_BUS_EN, REG_UFS_CFG1);
-		ufshcd_rmwl(host->hba, TEST_BUS_EN, TEST_BUS_EN, REG_UFS_CFG1);
-	} else {
-		ufshcd_rmwl(host->hba, UFS_REG_TEST_BUS_EN, 0, REG_UFS_CFG1);
-		ufshcd_rmwl(host->hba, TEST_BUS_EN, 0, REG_UFS_CFG1);
-	}
+	ufshcd_rmwl(host->hba, UFS_REG_TEST_BUS_EN,
+			UFS_REG_TEST_BUS_EN, REG_UFS_CFG1);
+	ufshcd_rmwl(host->hba, TEST_BUS_EN, TEST_BUS_EN, REG_UFS_CFG1);
 }
 
 static void ufs_qcom_get_default_testbus_cfg(struct ufs_qcom_host *host)
@@ -1315,9 +1306,6 @@ static void ufs_qcom_dump_dbg_regs(struct ufs_hba *hba)
 	ufshcd_dump_regs(hba, REG_UFS_SYS1CLK_1US, 16 * 4,
 			 "HCI Vendor Specific Registers ");
 
-	if (!(host->dbg_print_en & UFS_QCOM_DBG_PRINT_REGS_EN))
-		return;
-
 	reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_REG_OCSC);
 	ufshcd_dump_regs(hba, reg, 44 * 4, "UFS_UFS_DBG_RD_REG_OCSC ");
 
diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h
index 44466a395bb5..e567e4636357 100644
--- a/drivers/ufs/host/ufs-qcom.h
+++ b/drivers/ufs/host/ufs-qcom.h
@@ -113,15 +113,6 @@ enum {
 	MASK_CLK_NS_REG                     = 0xFFFC00,
 };
 
-/* QCOM UFS debug print bit mask */
-#define UFS_QCOM_DBG_PRINT_REGS_EN	BIT(0)
-#define UFS_QCOM_DBG_PRINT_ICE_REGS_EN	BIT(1)
-#define UFS_QCOM_DBG_PRINT_TEST_BUS_EN	BIT(2)
-
-#define UFS_QCOM_DBG_PRINT_ALL	\
-	(UFS_QCOM_DBG_PRINT_REGS_EN | UFS_QCOM_DBG_PRINT_ICE_REGS_EN | \
-	 UFS_QCOM_DBG_PRINT_TEST_BUS_EN)
-
 /* QUniPro Vendor specific attributes */
 #define PA_VS_CONFIG_REG1	0x9000
 #define DME_VS_CORE_CLK_CTRL	0xD002
@@ -212,8 +203,6 @@ struct ufs_qcom_host {
 
 	u32 dev_ref_clk_en_mask;
 
-	/* Bitmask for enabling debug prints */
-	u32 dbg_print_en;
 	struct ufs_qcom_testbus testbus;
 
 	/* Reset control of HCI */
-- 
2.38.1
Re: [PATCH 3/4] scsi: ufs: ufs-qcom: Remove usage of dbg_print_en
Posted by Manivannan Sadhasivam 3 years, 2 months ago 
On Thu, Dec 01, 2022 at 05:08:09PM -0600, Andrew Halaney wrote:
> This bitmask is unconditionally set in the current driver,
> so all conditionals using it can be considered bit rot.
> 
> Let's take the current default conditional path everywhere and remove
> dbg_print_en from the driver.
> 
> Signed-off-by: Andrew Halaney <ahalaney@redhat.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

Thanks,
Mani

> ---
>  drivers/ufs/host/ufs-qcom.c | 18 +++---------------
>  drivers/ufs/host/ufs-qcom.h | 11 -----------
>  2 files changed, 3 insertions(+), 26 deletions(-)
> 
> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
> index 1b0dfbbdcdf3..b1fcff1fad0c 100644
> --- a/drivers/ufs/host/ufs-qcom.c
> +++ b/drivers/ufs/host/ufs-qcom.c
> @@ -22,9 +22,6 @@
>  #include <ufs/ufshci.h>
>  #include <ufs/ufs_quirks.h>
>  
> -#define UFS_QCOM_DEFAULT_DBG_PRINT_EN	\
> -	(UFS_QCOM_DBG_PRINT_REGS_EN | UFS_QCOM_DBG_PRINT_TEST_BUS_EN)
> -
>  enum {
>  	TSTBUS_UAWM,
>  	TSTBUS_UARM,
> @@ -1040,7 +1037,6 @@ static int ufs_qcom_init(struct ufs_hba *hba)
>  	if (hba->dev->id < MAX_UFS_QCOM_HOSTS)
>  		ufs_qcom_hosts[hba->dev->id] = host;
>  
> -	host->dbg_print_en |= UFS_QCOM_DEFAULT_DBG_PRINT_EN;
>  	ufs_qcom_get_default_testbus_cfg(host);
>  	err = ufs_qcom_testbus_config(host);
>  	if (err) {
> @@ -1191,14 +1187,9 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
>  
>  static void ufs_qcom_enable_test_bus(struct ufs_qcom_host *host)
>  {
> -	if (host->dbg_print_en & UFS_QCOM_DBG_PRINT_TEST_BUS_EN) {
> -		ufshcd_rmwl(host->hba, UFS_REG_TEST_BUS_EN,
> -				UFS_REG_TEST_BUS_EN, REG_UFS_CFG1);
> -		ufshcd_rmwl(host->hba, TEST_BUS_EN, TEST_BUS_EN, REG_UFS_CFG1);
> -	} else {
> -		ufshcd_rmwl(host->hba, UFS_REG_TEST_BUS_EN, 0, REG_UFS_CFG1);
> -		ufshcd_rmwl(host->hba, TEST_BUS_EN, 0, REG_UFS_CFG1);
> -	}
> +	ufshcd_rmwl(host->hba, UFS_REG_TEST_BUS_EN,
> +			UFS_REG_TEST_BUS_EN, REG_UFS_CFG1);
> +	ufshcd_rmwl(host->hba, TEST_BUS_EN, TEST_BUS_EN, REG_UFS_CFG1);
>  }
>  
>  static void ufs_qcom_get_default_testbus_cfg(struct ufs_qcom_host *host)
> @@ -1315,9 +1306,6 @@ static void ufs_qcom_dump_dbg_regs(struct ufs_hba *hba)
>  	ufshcd_dump_regs(hba, REG_UFS_SYS1CLK_1US, 16 * 4,
>  			 "HCI Vendor Specific Registers ");
>  
> -	if (!(host->dbg_print_en & UFS_QCOM_DBG_PRINT_REGS_EN))
> -		return;
> -
>  	reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_REG_OCSC);
>  	ufshcd_dump_regs(hba, reg, 44 * 4, "UFS_UFS_DBG_RD_REG_OCSC ");
>  
> diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h
> index 44466a395bb5..e567e4636357 100644
> --- a/drivers/ufs/host/ufs-qcom.h
> +++ b/drivers/ufs/host/ufs-qcom.h
> @@ -113,15 +113,6 @@ enum {
>  	MASK_CLK_NS_REG                     = 0xFFFC00,
>  };
>  
> -/* QCOM UFS debug print bit mask */
> -#define UFS_QCOM_DBG_PRINT_REGS_EN	BIT(0)
> -#define UFS_QCOM_DBG_PRINT_ICE_REGS_EN	BIT(1)
> -#define UFS_QCOM_DBG_PRINT_TEST_BUS_EN	BIT(2)
> -
> -#define UFS_QCOM_DBG_PRINT_ALL	\
> -	(UFS_QCOM_DBG_PRINT_REGS_EN | UFS_QCOM_DBG_PRINT_ICE_REGS_EN | \
> -	 UFS_QCOM_DBG_PRINT_TEST_BUS_EN)
> -
>  /* QUniPro Vendor specific attributes */
>  #define PA_VS_CONFIG_REG1	0x9000
>  #define DME_VS_CORE_CLK_CTRL	0xD002
> @@ -212,8 +203,6 @@ struct ufs_qcom_host {
>  
>  	u32 dev_ref_clk_en_mask;
>  
> -	/* Bitmask for enabling debug prints */
> -	u32 dbg_print_en;
>  	struct ufs_qcom_testbus testbus;
>  
>  	/* Reset control of HCI */
> -- 
> 2.38.1
> 

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