linux-kernel - [PATCH v2] soc: kunpeng_hccs: fix some sparse warnings about incorrect type

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Message-ID: <20230816073706.33297-1-lihuisong@huawei.com>
Date:   Wed, 16 Aug 2023 15:37:06 +0800
From:   Huisong Li <lihuisong@...wei.com>
To:     <xuwei5@...ilicon.com>, <arnd@...db.de>, <arnd@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <soc@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <liuyonglong@...wei.com>,
        <lihuisong@...wei.com>
Subject: [PATCH v2] soc: kunpeng_hccs: fix some sparse warnings about incorrect type

This patch fixes some sparse warnings about incorrect type.
The address about PCC communication space should use '__iomem' tag.

Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202308151142.dH5Muhva-lkp@intel.com/
Fixes: 886bdf9c883b ("soc: hisilicon: Support HCCS driver on Kunpeng SoC")
Signed-off-by: Huisong Li <lihuisong@...wei.com>
---
v2: remove (u8 *) before cl_info->pcc_comm_addr to resolve "cast removes
    address space '__iomem' of expression" warning.

---
 drivers/soc/hisilicon/kunpeng_hccs.c | 13 +++++++------
 drivers/soc/hisilicon/kunpeng_hccs.h |  2 +-
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/soc/hisilicon/kunpeng_hccs.c b/drivers/soc/hisilicon/kunpeng_hccs.c
index 0d6f6bacd3f6..f3810d9d1caa 100644
--- a/drivers/soc/hisilicon/kunpeng_hccs.c
+++ b/drivers/soc/hisilicon/kunpeng_hccs.c
@@ -156,8 +156,8 @@ static int hccs_register_pcc_channel(struct hccs_dev *hdev)
 	}
 
 	if (pcc_chan->shmem_base_addr) {
-		cl_info->pcc_comm_addr = (void __force *)ioremap(
-			pcc_chan->shmem_base_addr, pcc_chan->shmem_size);
+		cl_info->pcc_comm_addr = ioremap(pcc_chan->shmem_base_addr,
+						 pcc_chan->shmem_size);
 		if (!cl_info->pcc_comm_addr) {
 			dev_err(dev, "Failed to ioremap PCC communication region for channel-%d.\n",
 				hdev->chan_id);
@@ -177,7 +177,8 @@ static int hccs_register_pcc_channel(struct hccs_dev *hdev)
 static int hccs_check_chan_cmd_complete(struct hccs_dev *hdev)
 {
 	struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
-	struct acpi_pcct_shared_memory *comm_base = cl_info->pcc_comm_addr;
+	struct acpi_pcct_shared_memory __iomem *comm_base =
+							cl_info->pcc_comm_addr;
 	u16 status;
 	int ret;
 
@@ -199,8 +200,8 @@ static int hccs_pcc_cmd_send(struct hccs_dev *hdev, u8 cmd,
 			     struct hccs_desc *desc)
 {
 	struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
-	struct acpi_pcct_shared_memory *comm_base = cl_info->pcc_comm_addr;
-	void *comm_space = (void *)(comm_base + 1);
+	void __iomem *comm_space = cl_info->pcc_comm_addr +
+					sizeof(struct acpi_pcct_shared_memory);
 	struct hccs_fw_inner_head *fw_inner_head;
 	struct acpi_pcct_shared_memory tmp = {0};
 	u16 comm_space_size;
@@ -212,7 +213,7 @@ static int hccs_pcc_cmd_send(struct hccs_dev *hdev, u8 cmd,
 	tmp.command = cmd;
 	/* Clear cmd complete bit */
 	tmp.status = 0;
-	memcpy_toio(comm_base, (void *)&tmp,
+	memcpy_toio(cl_info->pcc_comm_addr, (void *)&tmp,
 			sizeof(struct acpi_pcct_shared_memory));
 
 	/* Copy the message to the PCC comm space */
diff --git a/drivers/soc/hisilicon/kunpeng_hccs.h b/drivers/soc/hisilicon/kunpeng_hccs.h
index 9d71fb78443f..6012d2776028 100644
--- a/drivers/soc/hisilicon/kunpeng_hccs.h
+++ b/drivers/soc/hisilicon/kunpeng_hccs.h
@@ -50,7 +50,7 @@ struct hccs_mbox_client_info {
 	struct mbox_chan *mbox_chan;
 	struct pcc_mbox_chan *pcc_chan;
 	u64 deadline_us;
-	void *pcc_comm_addr;
+	void __iomem *pcc_comm_addr;
 };
 
 struct hccs_dev {
-- 
2.33.0