linux-kernel - [PATCH v9 01/16] ufs: core: Optimize duplicate code to read extended feature

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Date:   Wed, 30 Nov 2022 15:50:33 -0800
From:   Asutosh Das <quic_asutoshd@...cinc.com>
To:     <quic_cang@...cinc.com>, <martin.petersen@...cle.com>,
        <linux-scsi@...r.kernel.org>
CC:     <quic_nguyenb@...cinc.com>, <quic_xiaosenh@...cinc.com>,
        <stanley.chu@...iatek.com>, <eddie.huang@...iatek.com>,
        <daejun7.park@...sung.com>, <bvanassche@....org>,
        <avri.altman@....com>, <mani@...nel.org>, <beanhuo@...ron.com>,
        Asutosh Das <quic_asutoshd@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        Jinyoung Choi <j-young.choi@...sung.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH v9 01/16] ufs: core: Optimize duplicate code to read extended feature

The code to parse the extended feature is duplicated twice
in the ufs core. Replace the duplicated code with a
function.

Signed-off-by: Asutosh Das <quic_asutoshd@...cinc.com>
Reviewed-by: Bart Van Assche <bvanassche@....org>
Reviewed-by: Manivannan Sadhasivam <mani@...nel.org>
---
 drivers/ufs/core/ufshcd.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 2dbe249..6ea22b5 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -215,6 +215,17 @@ ufs_get_desired_pm_lvl_for_dev_link_state(enum ufs_dev_pwr_mode dev_state,
 	return UFS_PM_LVL_0;
 }
 
+static unsigned int ufs_get_ext_ufs_feature(struct ufs_hba *hba,
+					    const u8 *desc_buf)
+{
+	if (hba->desc_size[QUERY_DESC_IDN_DEVICE] <
+	    DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP + 4)
+		return 0;
+
+	return get_unaligned_be32(desc_buf +
+				  DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP);
+}
+
 static const struct ufs_dev_quirk ufs_fixups[] = {
 	/* UFS cards deviations table */
 	{ .wmanufacturerid = UFS_VENDOR_MICRON,
@@ -7608,13 +7619,7 @@ static void ufshcd_wb_probe(struct ufs_hba *hba, const u8 *desc_buf)
 	     (hba->dev_quirks & UFS_DEVICE_QUIRK_SUPPORT_EXTENDED_FEATURES)))
 		goto wb_disabled;
 
-	if (hba->desc_size[QUERY_DESC_IDN_DEVICE] <
-	    DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP + 4)
-		goto wb_disabled;
-
-	ext_ufs_feature = get_unaligned_be32(desc_buf +
-					DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP);
-
+	ext_ufs_feature = ufs_get_ext_ufs_feature(hba, desc_buf);
 	if (!(ext_ufs_feature & UFS_DEV_WRITE_BOOSTER_SUP))
 		goto wb_disabled;
 
@@ -7668,7 +7673,7 @@ static void ufshcd_temp_notif_probe(struct ufs_hba *hba, const u8 *desc_buf)
 	if (!(hba->caps & UFSHCD_CAP_TEMP_NOTIF) || dev_info->wspecversion < 0x300)
 		return;
 
-	ext_ufs_feature = get_unaligned_be32(desc_buf + DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP);
+	ext_ufs_feature = ufs_get_ext_ufs_feature(hba, desc_buf);
 
 	if (ext_ufs_feature & UFS_DEV_LOW_TEMP_NOTIF)
 		mask |= MASK_EE_TOO_LOW_TEMP;
-- 
2.7.4