linux-kernel - [PATCH v1 1/1] scsi: ufs: core: correct utp_transfer_cmd

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Date:   Wed, 26 Apr 2023 22:59:41 -0700
From:   "Bao D. Nguyen" <quic_nguyenb@...cinc.com>
To:     <quic_asutoshd@...cinc.com>, <quic_cang@...cinc.com>,
        <bvanassche@....org>, <mani@...nel.org>,
        <stanley.chu@...iatek.com>, <adrian.hunter@...el.com>,
        <beanhuo@...ron.com>, <avri.altman@....com>,
        <martin.petersen@...cle.com>
CC:     <linux-scsi@...r.kernel.org>,
        "Bao D. Nguyen" <quic_nguyenb@...cinc.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        Alice Chao <alice.chao@...iatek.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH v1 1/1] scsi: ufs: core: correct utp_transfer_cmd_desc size

When allocating memory for the UTP Command Descriptor
hba->ucdl_base_addr in ufshcd_memory_alloc(), the macro
sizeof_utp_transfer_cmd_desc() is used to calculate the size
of the memory allocation. This macro includes the prd_table as
part of the UTP Command Descriptor memory. However, when freeing
this memory in the ufshcd_release_sdb_queue(), the
sizeof(struct utp_transfer_cmd_desc) is used, and it does not
include the prd_table size for the memory to be freed.
This results in a mismatch of memory size allocated/freed.

Similarly, the ufshcd_mcq_get_tag() incorrectly uses the
sizeof(struct utp_transfer_cmd_desc) to find the tag number.
This results in failing to probe.

Signed-off-by: Bao D. Nguyen <quic_nguyenb@...cinc.com>
---
 drivers/ufs/core/ufs-mcq.c | 2 +-
 drivers/ufs/core/ufshcd.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c
index 202ff71..b7c5f39 100644
--- a/drivers/ufs/core/ufs-mcq.c
+++ b/drivers/ufs/core/ufs-mcq.c
@@ -265,7 +265,7 @@ static int ufshcd_mcq_get_tag(struct ufs_hba *hba,
 	addr = (le64_to_cpu(cqe->command_desc_base_addr) & CQE_UCD_BA) -
 		hba->ucdl_dma_addr;
 
-	return div_u64(addr, sizeof(struct utp_transfer_cmd_desc));
+	return div_u64(addr, sizeof_utp_transfer_cmd_desc(hba));
 }
 
 static void ufshcd_mcq_process_cqe(struct ufs_hba *hba,
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 9434328..b009e55 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -8444,7 +8444,7 @@ static void ufshcd_release_sdb_queue(struct ufs_hba *hba, int nutrs)
 {
 	size_t ucdl_size, utrdl_size;
 
-	ucdl_size = sizeof(struct utp_transfer_cmd_desc) * nutrs;
+	ucdl_size = sizeof_utp_transfer_cmd_desc(hba) * nutrs;
 	dmam_free_coherent(hba->dev, ucdl_size, hba->ucdl_base_addr,
 			   hba->ucdl_dma_addr);
 
-- 
2.7.4