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Subject: [PATCH v4 1/7] scsi: ufs: wb: Move ufshcd_is_wb_allowed() to callee
Reply-To: j-young.choi@samsung.com
Sender: Jinyoung CHOI <j-young.choi@samsung.com>
From:   Jinyoung CHOI <j-young.choi@samsung.com>
To:     ALIM AKHTAR <alim.akhtar@samsung.com>,
        "avri.altman@wdc.com" <avri.altman@wdc.com>,
        "bvanassche@acm.org" <bvanassche@acm.org>,
        "jejb@linux.ibm.com" <jejb@linux.ibm.com>,
        "martin.petersen@oracle.com" <martin.petersen@oracle.com>,
        "beanhuo@micron.com" <beanhuo@micron.com>,
        "adrian.hunter@intel.com" <adrian.hunter@intel.com>,
        "linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
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Message-ID: <20220727070410epcms2p5206785e4d960b32dcbb6729710dab535@epcms2p5>
Date:   Wed, 27 Jul 2022 16:04:10 +0900
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References: <20220727065904epcms2p60a7a56101785ddefa55c82b3cc25116d@epcms2p6>
        <CGME20220727065904epcms2p60a7a56101785ddefa55c82b3cc25116d@epcms2p5>
Precedence: bulk

The condition test is performed for each function calling
__ufshcd_wb_toggle().
By modifying the position, it removes the code redundancy and prevents
the test from being missing in the caller function.

Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Jinyoung Choi <j-young.choi@samsung.com>
---
 drivers/ufs/core/ufshcd.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 8f11f118c30e..a3bdf9986511 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -5722,6 +5722,9 @@ static int __ufshcd_wb_toggle(struct ufs_hba *hba, bool set, enum flag_idn idn)
 	enum query_opcode opcode = set ? UPIU_QUERY_OPCODE_SET_FLAG :
 				   UPIU_QUERY_OPCODE_CLEAR_FLAG;
 
+	if (!ufshcd_is_wb_allowed(hba))
+		return -EPERM;
+
 	index = ufshcd_wb_get_query_index(hba);
 	return ufshcd_query_flag_retry(hba, opcode, idn, index, NULL);
 }
@@ -5730,9 +5733,6 @@ int ufshcd_wb_toggle(struct ufs_hba *hba, bool enable)
 {
 	int ret;
 
-	if (!ufshcd_is_wb_allowed(hba))
-		return 0;
-
 	if (!(enable ^ hba->dev_info.wb_enabled))
 		return 0;
 
@@ -5769,8 +5769,7 @@ static inline void ufshcd_wb_toggle_flush(struct ufs_hba *hba, bool enable)
 {
 	int ret;
 
-	if (!ufshcd_is_wb_allowed(hba) ||
-	    hba->dev_info.wb_buf_flush_enabled == enable)
+	if (hba->dev_info.wb_buf_flush_enabled == enable)
 		return;
 
 	ret = __ufshcd_wb_toggle(hba, enable, QUERY_FLAG_IDN_WB_BUFF_FLUSH_EN);
-- 
2.25.1