linux-kernel - Re: [PATCH 3/4] scsi: ufs: ufs-qcom: Remove usage of dbg_print

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Date:   Fri, 2 Dec 2022 13:09:51 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Andrew Halaney <ahalaney@...hat.com>
Cc:     andersson@...nel.org, agross@...nel.org, konrad.dybcio@...aro.org,
        jejb@...ux.ibm.com, martin.petersen@...cle.com,
        p.zabel@...gutronix.de, linux-arm-msm@...r.kernel.org,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] scsi: ufs: ufs-qcom: Remove usage of dbg_print_en

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@...hat.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.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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