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Message-ID: <00d201cea4c9$b30564e0$19102ea0$@codeaurora.org>
Date: Thu, 29 Aug 2013 18:09:00 +0300
From: "Yaniv Gardi" <ygardi@...eaurora.org>
To: "'Raviv Shvili'" <rshvili@...eaurora.org>,
<linux-scsi@...r.kernel.org>
Cc: <linux-arm-msm@...r.kernel.org>,
"'open list'" <linux-kernel@...r.kernel.org>
Subject: RE: [RFC/PATCH 2/3] scsi: ufs: device query status and size check
Tested-by: Yaniv Gardi <ygardi@...eaurora.org>
QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
= > -----Original Message-----
= > From: linux-scsi-owner@...r.kernel.org [mailto:linux-scsi-
= > owner@...r.kernel.org] On Behalf Of Yaniv Gardi
= > Sent: Thursday, August 29, 2013 6:07 PM
= > To: 'Raviv Shvili'; linux-scsi@...r.kernel.org
= > Cc: linux-arm-msm@...r.kernel.org; 'open list'
= > Subject: RE: [RFC/PATCH 2/3] scsi: ufs: device query status and size
check
= >
= > Looks good to me.
= > Reviewed-by: Yaniv Gardi <ygardi@...eaurora.org>
= >
= > QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a
= > member of Code Aurora Forum, hosted by The Linux Foundation
= >
= >
= > = > -----Original Message-----
= > = > From: linux-scsi-owner@...r.kernel.org [mailto:linux-scsi- = >
= > owner@...r.kernel.org] On Behalf Of Raviv Shvili = > Sent: Thursday,
= > August 29, 2013 6:00 PM = > To: linux-scsi@...r.kernel.org = > Cc:
linux-
= > arm-msm@...r.kernel.org; Raviv Shvili; open list = > Subject: [RFC/PATCH
= > 2/3] scsi: ufs: device query status and size check = > = > Check query
= > response status before copying the response.
= > = > Add descriptor query response size check, before copying it to
buffer.
= > = >
= > = > Signed-off-by: Raviv Shvili <rshvili@...eaurora.org> = > = > diff
--git
= > a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index = >
= > 6da0d41..d0cad34 100644 = > --- a/drivers/scsi/ufs/ufshcd.c = > +++
= > b/drivers/scsi/ufs/ufshcd.c = > @@ -440,31 +440,35 @@ static inline void
= > ufshcd_query_to_be(struct = > utp_upiu_query *request)
= > = > * @lrb - pointer to local reference block
= > = > */
= > = > static
= > = > -void ufshcd_copy_query_response(struct ufs_hba *hba, struct
= > ufshcd_lrb = > *lrbp) = > +int ufshcd_copy_query_response(struct ufs_hba
= > *hba, struct ufshcd_lrb = > +*lrbp) = > {
= > = > struct ufs_query_res *query_res = &hba-
= > = > >dev_cmd.query.response;
= > = >
= > = > - /* Get the UPIU response */
= > = > - query_res->response = ufshcd_get_rsp_upiu_result(lrbp-
= > = > >ucd_rsp_ptr) >>
= > = > - UPIU_RSP_CODE_OFFSET;
= > = > -
= > = > memcpy(&query_res->upiu_res, &lrbp->ucd_rsp_ptr->qr,
= > = > QUERY_OSF_SIZE);
= > = > ufshcd_query_to_cpu(&query_res->upiu_res);
= > = >
= > = > -
= > = > /* Get the descriptor */
= > = > if (lrbp->ucd_rsp_ptr->qr.opcode ==
= > = > UPIU_QUERY_OPCODE_READ_DESC) {
= > = > u8 *descp = (u8 *)lrbp->ucd_rsp_ptr +
= > = > GENERAL_UPIU_REQUEST_SIZE;
= > = > - u16 len;
= > = > + u16 resp_len;
= > = > + u16 buf_len;
= > = >
= > = > /* data segment length */
= > = > - len = be32_to_cpu(lrbp->ucd_rsp_ptr->header.dword_2)
&
= > = > + resp_len = be32_to_cpu(lrbp->ucd_rsp_ptr-
= > = > >header.dword_2) &
= > = >
= > = > MASK_QUERY_DATA_SEG_LEN;
= > = > -
= > = > - memcpy(hba->dev_cmd.query.descriptor, descp,
= > = > - min_t(u16, len,
QUERY_DESC_MAX_SIZE));
= > = > + buf_len =
hba->dev_cmd.query.request.upiu_req.length;
= > = > + if (likely(buf_len >= resp_len)) {
= > = > + memcpy(hba->dev_cmd.query.descriptor, descp,
= > = > resp_len);
= > = > + } else {
= > = > + dev_warn(hba->dev,
= > = > + "%s: Response size is bigger than
buffer",
= > = > + __func__);
= > = > + return -EINVAL;
= > = > + }
= > = > }
= > = > +
= > = > + return 0;
= > = > }
= > = >
= > = > /**
= > = > @@ -781,11 +785,9 @@ static void
= > = > ufshcd_prepare_utp_query_req_upiu(struct ufs_hba *hba,
= > = > ufshcd_query_to_be(&ucd_req_ptr->qr);
= > = >
= > = > /* Copy the Descriptor */
= > = > - if ((len > 0) && (query->request.upiu_req.opcode ==
= > = > -
= > = > UPIU_QUERY_OPCODE_WRITE_DESC)) {
= > = > - memcpy(descp, query->descriptor,
= > = > - min_t(u16, len,
QUERY_DESC_MAX_SIZE));
= > = > - }
= > = > + if (query->request.upiu_req.opcode ==
= > = > UPIU_QUERY_OPCODE_WRITE_DESC)
= > = > + memcpy(descp, query->descriptor, len);
= > = > +
= > = > }
= > = >
= > = > static inline void ufshcd_prepare_utp_nop_upiu(struct ufshcd_lrb
= > *lrbp) = > @@ -964,6 +966,17 @@ ufshcd_clear_cmd(struct ufs_hba *hba,
= > int tag)
= > = > return err;
= > = > }
= > = >
= > = > +static int
= > = > +ufshcd_check_query_response(struct ufs_hba *hba, struct ufshcd_lrb
= > = > +*lrbp) {
= > = > + struct ufs_query_res *query_res = &hba-
= > = > >dev_cmd.query.response;
= > = > +
= > = > + /* Get the UPIU response */
= > = > + query_res->response = ufshcd_get_rsp_upiu_result(lrbp-
= > = > >ucd_rsp_ptr) >>
= > = > + UPIU_RSP_CODE_OFFSET;
= > = > + return query_res->response;
= > = > +}
= > = > +
= > = > /**
= > = > * ufshcd_dev_cmd_completion() - handles device management
= > command
= > = > responses
= > = > * @hba: per adapter instance
= > = > @@ -986,7 +999,9 @@ ufshcd_dev_cmd_completion(struct ufs_hba
= > *hba, = > struct ufshcd_lrb *lrbp)
= > = > }
= > = > break;
= > = > case UPIU_TRANSACTION_QUERY_RSP:
= > = > - ufshcd_copy_query_response(hba, lrbp);
= > = > + err = ufshcd_check_query_response(hba, lrbp);
= > = > + if (!err)
= > = > + err = ufshcd_copy_query_response(hba, lrbp);
= > = > break;
= > = > case UPIU_TRANSACTION_REJECT_UPIU:
= > = > /* TODO: handle Reject UPIU Response */
= > = > --
= > = > 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@...r.kernel.org More
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= >
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