Looks good to me. Reviewed-by: Subhash Jadavani <subhashj@xxxxxxxxxxxxxx> > Some of the data structures (like response UPIU) and/or its elements > (unused fields) should be cleared before sending out the respective > command to UFS device. > > This change clears the UPIU response data structure for query commands > and NOP command before sending out the command. We also initialize the > PRDT table length to zero which should take care of commands which doesn't > have any data associated with it. We are also clearing the unused fields > in > request UPIU for NOP command. > > Signed-off-by: Subhash Jadavani <subhashj@xxxxxxxxxxxxxx> > Signed-off-by: Yaniv Gardi <ygardi@xxxxxxxxxxxxxx> > > --- > drivers/scsi/ufs/ufshcd.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c > index 3428f72..2d3ebca 100644 > --- a/drivers/scsi/ufs/ufshcd.c > +++ b/drivers/scsi/ufs/ufshcd.c > @@ -1129,6 +1129,8 @@ static void ufshcd_prepare_req_desc_hdr(struct > ufshcd_lrb *lrbp, > cpu_to_le32(OCS_INVALID_COMMAND_STATUS); > /* dword_3 is reserved, hence it is set to 0 */ > req_desc->header.dword_3 = 0; > + > + req_desc->prd_table_length = 0; > } > > /** > @@ -1198,6 +1200,7 @@ static void ufshcd_prepare_utp_query_req_upiu(struct > ufs_hba *hba, > if (query->request.upiu_req.opcode == UPIU_QUERY_OPCODE_WRITE_DESC) > memcpy(descp, query->descriptor, len); > > + memset(lrbp->ucd_rsp_ptr, 0, sizeof(struct utp_upiu_rsp)); > } > > static inline void ufshcd_prepare_utp_nop_upiu(struct ufshcd_lrb *lrbp) > @@ -1210,6 +1213,11 @@ static inline void > ufshcd_prepare_utp_nop_upiu(struct ufshcd_lrb *lrbp) > ucd_req_ptr->header.dword_0 = > UPIU_HEADER_DWORD( > UPIU_TRANSACTION_NOP_OUT, 0, 0, lrbp->task_tag); > + /* clear rest of the fields of basic header */ > + ucd_req_ptr->header.dword_1 = 0; > + ucd_req_ptr->header.dword_2 = 0; > + > + memset(lrbp->ucd_rsp_ptr, 0, sizeof(struct utp_upiu_rsp)); > } > > /** > -- > 1.8.5.2 > > -- > QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member > of Code Aurora Forum, hosted by The Linux Foundation > -- > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
