scsi: Revert "scsi: ufs: core: Probe for EXT_IID support"

This reverts commit 6e1d850acff9477ae4c18a73c19ef52841ac2010.

Although added a while ago, to date no one make use of ext_iid,
specifically incorporates it in the upiu header. Therefore, remove it as
it is currently unused and not serving any purpose.

Signed-off-by: Avri Altman <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Cc: Can Guo <[e-mail]>
Cc: Asutosh Das <[e-mail]>
Reviewed-by: Bart Van Assche <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/ufs/core/ufshcd.c

···
 	else
 		hba->lsdb_sup = true;
 
-	if (!hba->mcq_sup)
-		return 0;
-
 	hba->mcq_capabilities = ufshcd_readl(hba, REG_MCQCAP);
-	hba->ext_iid_sup = FIELD_GET(MASK_EXT_IID_SUPPORT,
-				     hba->mcq_capabilities);
 
 	return 0;
 }
···
 	}
 }
 
-static void ufshcd_ext_iid_probe(struct ufs_hba *hba, u8 *desc_buf)
-{
-	struct ufs_dev_info *dev_info = &hba->dev_info;
-	u32 ext_ufs_feature;
-	u32 ext_iid_en = 0;
-	int err;
-
-	/* Only UFS-4.0 and above may support EXT_IID */
-	if (dev_info->wspecversion < 0x400)
-		goto out;
-
-	ext_ufs_feature = get_unaligned_be32(desc_buf +
-				     DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP);
-	if (!(ext_ufs_feature & UFS_DEV_EXT_IID_SUP))
-		goto out;
-
-	err = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR,
-				      QUERY_ATTR_IDN_EXT_IID_EN, 0, 0, &ext_iid_en);
-	if (err)
-		dev_err(hba->dev, "failed reading bEXTIIDEn. err = %d\n", err);
-
-out:
-	dev_info->b_ext_iid_en = ext_iid_en;
-}
-
 static void ufshcd_set_rtt(struct ufs_hba *hba)
 {
 	struct ufs_dev_info *dev_info = &hba->dev_info;
···
 	ufshcd_temp_notif_probe(hba, desc_buf);
 
 	ufs_init_rtc(hba, desc_buf);
-
-	if (hba->ext_iid_sup)
-		ufshcd_ext_iid_probe(hba, desc_buf);
 
 	/*
 	 * ufshcd_read_string_desc returns size of the string

include/ufs/ufs.h

···
 	QUERY_ATTR_IDN_AVAIL_WB_BUFF_SIZE       = 0x1D,
 	QUERY_ATTR_IDN_WB_BUFF_LIFE_TIME_EST    = 0x1E,
 	QUERY_ATTR_IDN_CURR_WB_BUFF_SIZE        = 0x1F,
-	QUERY_ATTR_IDN_EXT_IID_EN		= 0x2A,
 	QUERY_ATTR_IDN_TIMESTAMP		= 0x30
 };
 
···
 	UFS_DEV_EXT_TEMP_NOTIF		= BIT(6),
 	UFS_DEV_HPB_SUPPORT		= BIT(7),
 	UFS_DEV_WRITE_BOOSTER_SUP	= BIT(8),
-	UFS_DEV_EXT_IID_SUP		= BIT(16),
 };
 #define UFS_DEV_HPB_SUPPORT_VERSION		0x310
 
···
 	u8	b_presrv_uspc_en;
 
 	bool    b_advanced_rpmb_en;
-
-	/* UFS EXT_IID Enable */
-	bool	b_ext_iid_en;
 
 	/* UFS RTC */
 	enum ufs_rtc_time rtc_type;

include/ufs/ufshcd.h

···
  * @nr_queues: number of Queues of different queue types
  * @complete_put: whether or not to call ufshcd_rpm_put() from inside
  *	ufshcd_resume_complete()
- * @ext_iid_sup: is EXT_IID is supported by UFSHC
  * @mcq_sup: is mcq supported by UFSHC
  * @mcq_enabled: is mcq ready to accept requests
  * @res: array of resource info of MCQ registers
···
 	unsigned int nr_hw_queues;
 	unsigned int nr_queues[HCTX_MAX_TYPES];
 	bool complete_put;
-	bool ext_iid_sup;
 	bool scsi_host_added;
 	bool mcq_sup;
 	bool lsdb_sup;

include/ufs/ufshci.h

···
 	MASK_MCQ_SUPPORT			= 0x40000000,
 };
 
-/* MCQ capability mask */
-enum {
-	MASK_EXT_IID_SUPPORT = 0x00000400,
-};
-
 enum {
 	REG_SQATTR		= 0x0,
 	REG_SQLBA		= 0x4,