Sometimes queries from the device might return a failure so it is
recommended to retry sending the query, before giving up.
This change adds a wrapper to retry sending a query attribute,
in cases where we need to wait longer, before we continue,
or before reporting a failure.
Signed-off-by: Yaniv Gardi <yga...@codeaurora.org>
---
drivers/scsi/ufs/ufshcd.c | 51 ++++++++++++++++++++++++++++++++++++++++-------
1 file changed, 44 insertions(+), 7 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 024cc86..1c37a7d 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1827,6 +1827,43 @@ out:
}
/**
+ * ufshcd_query_attr_retry() - API function for sending query
+ * attribute with retries
+ * @hba: per-adapter instance
+ * @opcode: attribute opcode
+ * @idn: attribute idn to access
+ * @index: index field
+ * @selector: selector field
+ * @attr_val: the attribute value after the query request
+ * completes
+ *
+ * Returns 0 for success, non-zero in case of failure
+*/
+static int ufshcd_query_attr_retry(struct ufs_hba *hba,
+ enum query_opcode opcode, enum attr_idn idn, u8 index, u8 selector,
+ u32 *attr_val)
+{
+ int ret = 0;
+ u32 retries;
+
+ for (retries = QUERY_REQ_RETRIES; retries > 0; retries--) {
+ ret = ufshcd_query_attr(hba, opcode, idn, index,
+ selector, attr_val);
+ if (ret)
+ dev_dbg(hba->dev, "%s: failed with error %d, retries
%d\n",
+ __func__, ret, retries);
+ else
+ break;
+ }
+
+ if (ret)
+ dev_err(hba->dev,
+ "%s: query attribute, idn %d, failed with error %d
after %d retires\n",
+ __func__, idn, ret, QUERY_REQ_RETRIES);
+ return ret;
+}
+
+/**
* ufshcd_query_descriptor - API function for sending descriptor requests
* hba: per-adapter instance
* opcode: attribute opcode
@@ -3407,7 +3444,7 @@ static int ufshcd_disable_ee(struct ufs_hba *hba, u16
mask)
val = hba->ee_ctrl_mask & ~mask;
val &= 0xFFFF; /* 2 bytes */
- err = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
+ err = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
QUERY_ATTR_IDN_EE_CONTROL, 0, 0, &val);
if (!err)
hba->ee_ctrl_mask &= ~mask;
@@ -3435,7 +3472,7 @@ static int ufshcd_enable_ee(struct ufs_hba *hba, u16 mask)
val = hba->ee_ctrl_mask | mask;
val &= 0xFFFF; /* 2 bytes */
- err = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
+ err = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
QUERY_ATTR_IDN_EE_CONTROL, 0, 0, &val);
if (!err)
hba->ee_ctrl_mask |= mask;
@@ -3541,7 +3578,7 @@ static void ufshcd_force_reset_auto_bkops(struct ufs_hba
*hba)
static inline int ufshcd_get_bkops_status(struct ufs_hba *hba, u32 *status)
{
- return ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_READ_ATTR,
+ return ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR,
QUERY_ATTR_IDN_BKOPS_STATUS, 0, 0, status);
}
@@ -3604,7 +3641,7 @@ static int ufshcd_urgent_bkops(struct ufs_hba *hba)
static inline int ufshcd_get_ee_status(struct ufs_hba *hba, u32 *status)
{
- return ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_READ_ATTR,
+ return ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR,
QUERY_ATTR_IDN_EE_STATUS, 0, 0, status);
}
@@ -4360,9 +4397,9 @@ static void ufshcd_init_icc_levels(struct ufs_hba *hba)
dev_dbg(hba->dev, "%s: setting icc_level 0x%x",
__func__, hba->init_prefetch_data.icc_level);
- ret = ufshcd_query_attr(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
- QUERY_ATTR_IDN_ACTIVE_ICC_LVL, 0, 0,
- &hba->init_prefetch_data.icc_level);
+ ret = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
+ QUERY_ATTR_IDN_ACTIVE_ICC_LVL, 0, 0,
+ &hba->init_prefetch_data.icc_level);
if (ret)
dev_err(hba->dev,
--
1.8.5.2
--
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