[PATCH] HID: sfh: fix address space confusion

[PATCH] HID: sfh: fix address space confusion

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

The new driver uses a phys_addr_t to store a DMA address,
which does not work when the two are different size:

drivers/hid/amd-sfh-hid/amd_sfh_client.c:157:11: error: incompatible pointer types passing 'phys_addr_t *' (aka 'unsigned int *') to parameter of type 'dma_addr_t *' (aka 'unsigned long long *') [-Werror,-Wincompatible-pointer-types]
                                                                  &cl_data->sensor_phys_addr[i],
                                                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:393:15: note: passing argument to parameter 'dma_handle' here
                dma_addr_t *dma_handle, gfp_t gfp)
                            ^

Change both the type and the variable name to dma_addr for consistency.

Fixes: 4b2c53d93a4b ("SFH:Transport Driver to add support of AMD Sensor Fusion Hub (SFH)")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/hid/amd-sfh-hid/amd_sfh_client.c | 8 ++++----
 drivers/hid/amd-sfh-hid/amd_sfh_hid.h    | 2 +-
 drivers/hid/amd-sfh-hid/amd_sfh_pcie.c   | 2 +-
 drivers/hid/amd-sfh-hid/amd_sfh_pcie.h   | 2 +-
 4 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_client.c b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
index 3d1ccac5d99a..2ab38b715347 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_client.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
@@ -154,7 +154,7 @@ int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
 
 	for (i = 0; i < cl_data->num_hid_devices; i++) {
 		cl_data->sensor_virt_addr[i] = dma_alloc_coherent(dev, sizeof(int) * 8,
-								  &cl_data->sensor_phys_addr[i],
+								  &cl_data->sensor_dma_addr[i],
 								  GFP_KERNEL);
 		cl_data->sensor_sts[i] = 0;
 		cl_data->sensor_requested_cnt[i] = 0;
@@ -187,7 +187,7 @@ int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
 		}
 		info.period = msecs_to_jiffies(AMD_SFH_IDLE_LOOP);
 		info.sensor_idx = cl_idx;
-		info.phys_address = cl_data->sensor_phys_addr[i];
+		info.dma_address = cl_data->sensor_dma_addr[i];
 
 		cl_data->report_descr[i] = kzalloc(cl_data->report_descr_sz[i], GFP_KERNEL);
 		if (!cl_data->report_descr[i]) {
@@ -212,7 +212,7 @@ int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
 		if (cl_data->sensor_virt_addr[i]) {
 			dma_free_coherent(&privdata->pdev->dev, 8 * sizeof(int),
 					  cl_data->sensor_virt_addr[i],
-					  cl_data->sensor_phys_addr[i]);
+					  cl_data->sensor_dma_addr[i]);
 		}
 		kfree(cl_data->feature_report[i]);
 		kfree(cl_data->input_report[i]);
@@ -238,7 +238,7 @@ int amd_sfh_hid_client_deinit(struct amd_mp2_dev *privdata)
 		if (cl_data->sensor_virt_addr[i]) {
 			dma_free_coherent(&privdata->pdev->dev, 8 * sizeof(int),
 					  cl_data->sensor_virt_addr[i],
-					  cl_data->sensor_phys_addr[i]);
+					  cl_data->sensor_dma_addr[i]);
 		}
 	}
 	kfree(cl_data);
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_hid.h b/drivers/hid/amd-sfh-hid/amd_sfh_hid.h
index 6be0783d885c..d7eac1728e31 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_hid.h
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_hid.h
@@ -27,7 +27,7 @@ struct amdtp_cl_data {
 	int hid_descr_size[MAX_HID_DEVICES];
 	phys_addr_t phys_addr_base;
 	u32 *sensor_virt_addr[MAX_HID_DEVICES];
-	phys_addr_t sensor_phys_addr[MAX_HID_DEVICES];
+	dma_addr_t sensor_dma_addr[MAX_HID_DEVICES];
 	u32 sensor_sts[MAX_HID_DEVICES];
 	u32 sensor_requested_cnt[MAX_HID_DEVICES];
 	u8 report_type[MAX_HID_DEVICES];
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
index a51c7b76283b..dbac16641662 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
@@ -41,7 +41,7 @@ void amd_start_sensor(struct amd_mp2_dev *privdata, struct amd_mp2_sensor_info i
 	cmd_param.s.buf_layout = 1;
 	cmd_param.s.buf_length = 16;
 
-	writeq(info.phys_address, privdata->mmio + AMD_C2P_MSG2);
+	writeq(info.dma_address, privdata->mmio + AMD_C2P_MSG2);
 	writel(cmd_param.ul, privdata->mmio + AMD_C2P_MSG1);
 	writel(cmd_base.ul, privdata->mmio + AMD_C2P_MSG0);
 }
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h
index e8be94f935b7..8f8d19b2cfe5 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h
@@ -67,7 +67,7 @@ struct amd_mp2_dev {
 struct amd_mp2_sensor_info {
 	u8 sensor_idx;
 	u32 period;
-	phys_addr_t phys_address;
+	dma_addr_t dma_address;
 };
 
 void amd_start_sensor(struct amd_mp2_dev *privdata, struct amd_mp2_sensor_info info);
-- 
2.29.2

Re: [PATCH] HID: sfh: fix address space confusion

[Jiri Kosina]

On Sun, 3 Jan 2021, Arnd Bergmann wrote:

> From: Arnd Bergmann <arnd@arndb.de>
> 
> The new driver uses a phys_addr_t to store a DMA address,
> which does not work when the two are different size:
> 
> drivers/hid/amd-sfh-hid/amd_sfh_client.c:157:11: error: incompatible pointer types passing 'phys_addr_t *' (aka 'unsigned int *') to parameter of type 'dma_addr_t *' (aka 'unsigned long long *') [-Werror,-Wincompatible-pointer-types]
>                                                                   &cl_data->sensor_phys_addr[i],
>                                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/dma-mapping.h:393:15: note: passing argument to parameter 'dma_handle' here
>                 dma_addr_t *dma_handle, gfp_t gfp)
>                             ^
> 
> Change both the type and the variable name to dma_addr for consistency.
> 
> Fixes: 4b2c53d93a4b ("SFH:Transport Driver to add support of AMD Sensor Fusion Hub (SFH)")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Good catch; queued for 5.11, thanks.

-- 
Jiri Kosina
SUSE Labs