[PATCH 0/4] Fixes and updates to amd-sfh driver

[PATCH 0/4] Fixes and updates to amd-sfh driver

[Basavaraj Natikar]

Changes include fix to NULL pointer dereference, remove pci_ wrappers,
use dma_set_mask_and_coherent and copyright updates.

Basavaraj Natikar (4):
  amd_sfh: Fix potential NULL pointer dereference
  amd_sfh: Use dma_set_mask_and_coherent()
  amd_sfh: switch from 'pci_' to 'dev_' API
  amd_sfh: Update Copyright details

 drivers/hid/amd-sfh-hid/amd_sfh_client.c      |  3 +-
 drivers/hid/amd-sfh-hid/amd_sfh_hid.c         |  2 ++
 drivers/hid/amd-sfh-hid/amd_sfh_hid.h         |  2 ++
 drivers/hid/amd-sfh-hid/amd_sfh_pcie.c        | 33 +++++++++----------
 drivers/hid/amd-sfh-hid/amd_sfh_pcie.h        |  3 +-
 .../hid_descriptor/amd_sfh_hid_desc.c         |  3 +-
 .../hid_descriptor/amd_sfh_hid_desc.h         |  3 +-
 .../hid_descriptor/amd_sfh_hid_report_desc.h  |  3 +-
 8 files changed, 30 insertions(+), 22 deletions(-)

-- 
2.25.1

[PATCH 1/4] amd_sfh: Fix potential NULL pointer dereference

[Basavaraj Natikar]

The cl_data field of a privdata must be allocated and updated before
using in amd_sfh_hid_client_init() function.

Hence handling NULL pointer cl_data accordingly.

Fixes: d46ef750ed58 ("HID: amd_sfh: Fix potential NULL pointer dereference")
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
---
 drivers/hid/amd-sfh-hid/amd_sfh_pcie.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
index 076b46251c91..f5e580f598cd 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
@@ -251,21 +251,17 @@ static int amd_mp2_pci_probe(struct pci_dev *pdev, const struct pci_device_id *i
 		return rc;
 	}
 
-	rc = amd_sfh_hid_client_init(privdata);
-	if (rc)
-		return rc;
-
 	privdata->cl_data = devm_kzalloc(&pdev->dev, sizeof(struct amdtp_cl_data), GFP_KERNEL);
 	if (!privdata->cl_data)
 		return -ENOMEM;
 
-	rc = devm_add_action_or_reset(&pdev->dev, amd_mp2_pci_remove, privdata);
+	mp2_select_ops(privdata);
+
+	rc = amd_sfh_hid_client_init(privdata);
 	if (rc)
 		return rc;
 
-	mp2_select_ops(privdata);
-
-	return 0;
+	return devm_add_action_or_reset(&pdev->dev, amd_mp2_pci_remove, privdata);
 }
 
 static int __maybe_unused amd_mp2_pci_resume(struct device *dev)
-- 
2.25.1

[PATCH 2/4] amd_sfh: Use dma_set_mask_and_coherent()

[Basavaraj Natikar]

Use dma_set_mask_and_coherent() to set both the streaming and
coherent masks.

Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
---
 drivers/hid/amd-sfh-hid/amd_sfh_pcie.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
index f5e580f598cd..ebe396a4570d 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
@@ -245,10 +245,13 @@ static int amd_mp2_pci_probe(struct pci_dev *pdev, const struct pci_device_id *i
 
 	privdata->mmio = pcim_iomap_table(pdev)[2];
 	pci_set_master(pdev);
-	rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
+	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 	if (rc) {
-		rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
-		return rc;
+		rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+		if (rc) {
+			dev_err(&pdev->dev, "failed to set DMA mask\n");
+			return rc;
+		}
 	}
 
 	privdata->cl_data = devm_kzalloc(&pdev->dev, sizeof(struct amdtp_cl_data), GFP_KERNEL);
-- 
2.25.1

[PATCH 3/4] amd_sfh: switch from 'pci_' to 'dev_' API

[Basavaraj Natikar]

The wrappers pci_set_drvdata or pci_get_drvdata changed to
dev_set_drvdata or dev_get_drvdata.

Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
---
 drivers/hid/amd-sfh-hid/amd_sfh_pcie.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
index ebe396a4570d..b5c5ec52a3af 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
@@ -234,7 +234,7 @@ static int amd_mp2_pci_probe(struct pci_dev *pdev, const struct pci_device_id *i
 		return -ENOMEM;
 
 	privdata->pdev = pdev;
-	pci_set_drvdata(pdev, privdata);
+	dev_set_drvdata(&pdev->dev, privdata);
 	rc = pcim_enable_device(pdev);
 	if (rc)
 		return rc;
@@ -269,8 +269,7 @@ static int amd_mp2_pci_probe(struct pci_dev *pdev, const struct pci_device_id *i
 
 static int __maybe_unused amd_mp2_pci_resume(struct device *dev)
 {
-	struct pci_dev *pdev = to_pci_dev(dev);
-	struct amd_mp2_dev *mp2 = pci_get_drvdata(pdev);
+	struct amd_mp2_dev *mp2 = dev_get_drvdata(dev);
 	struct amdtp_cl_data *cl_data = mp2->cl_data;
 	struct amd_mp2_sensor_info info;
 	int i, status;
@@ -295,8 +294,7 @@ static int __maybe_unused amd_mp2_pci_resume(struct device *dev)
 
 static int __maybe_unused amd_mp2_pci_suspend(struct device *dev)
 {
-	struct pci_dev *pdev = to_pci_dev(dev);
-	struct amd_mp2_dev *mp2 = pci_get_drvdata(pdev);
+	struct amd_mp2_dev *mp2 = dev_get_drvdata(dev);
 	struct amdtp_cl_data *cl_data = mp2->cl_data;
 	int i, status;
 
-- 
2.25.1

[PATCH 4/4] amd_sfh: Update Copyright details

[Basavaraj Natikar]

Update the Copyright header and Author

Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
---
 drivers/hid/amd-sfh-hid/amd_sfh_client.c                      | 3 ++-
 drivers/hid/amd-sfh-hid/amd_sfh_hid.c                         | 2 ++
 drivers/hid/amd-sfh-hid/amd_sfh_hid.h                         | 2 ++
 drivers/hid/amd-sfh-hid/amd_sfh_pcie.c                        | 4 +++-
 drivers/hid/amd-sfh-hid/amd_sfh_pcie.h                        | 3 ++-
 drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.c     | 3 ++-
 drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.h     | 3 ++-
 .../hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_report_desc.h  | 3 ++-
 8 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_client.c b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
index 840fd075c56f..c5de0ec4f9d0 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_client.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
@@ -1,9 +1,10 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  AMD SFH Client Layer
- *  Copyright 2020 Advanced Micro Devices, Inc.
+ *  Copyright 2020-2021 Advanced Micro Devices, Inc.
  *  Authors: Nehal Bakulchandra Shah <Nehal-Bakulchandra.Shah@amd.com>
  *	     Sandeep Singh <Sandeep.singh@amd.com>
+ *	     Basavaraj Natikar <Basavaraj.Natikar@amd.com>
  */
 
 #include <linux/dma-mapping.h>
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_hid.c b/drivers/hid/amd-sfh-hid/amd_sfh_hid.c
index 5ad1e7acd294..2bf97b6ac973 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_hid.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_hid.c
@@ -2,8 +2,10 @@
 /*
  * AMD MP2 Sensors transport driver
  *
+ * Copyright 2020-2021 Advanced Micro Devices, Inc.
  * Authors: Nehal Bakulchandra Shah <Nehal-bakulchandra.shah@amd.com>
  *	    Sandeep Singh <sandeep.singh@amd.com>
+ *	    Basavaraj Natikar <Basavaraj.Natikar@amd.com>
  */
 #include <linux/hid.h>
 #include <linux/wait.h>
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_hid.h b/drivers/hid/amd-sfh-hid/amd_sfh_hid.h
index ae2ac9191ba7..c60abd38054c 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_hid.h
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_hid.h
@@ -2,8 +2,10 @@
 /*
  * AMD MP2 Sensors transport driver
  *
+ * Copyright 2020-2021 Advanced Micro Devices, Inc.
  * Authors: Nehal Bakulchandra Shah <Nehal-bakulchandra.shah@amd.com>
  *	    Sandeep Singh <sandeep.singh@amd.com>
+ *	    Basavaraj Natikar <Basavaraj.Natikar@amd.com>
  */
 
 #ifndef AMDSFH_HID_H
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
index b5c5ec52a3af..2503be0253d3 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.c
@@ -1,10 +1,11 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * AMD MP2 PCIe communication driver
- * Copyright 2020 Advanced Micro Devices, Inc.
+ * Copyright 2020-2021 Advanced Micro Devices, Inc.
  *
  * Authors: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
  *	    Sandeep Singh <Sandeep.singh@amd.com>
+ *	    Basavaraj Natikar <Basavaraj.Natikar@amd.com>
  */
 
 #include <linux/bitops.h>
@@ -335,3 +336,4 @@ MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_AUTHOR("Shyam Sundar S K <Shyam-sundar.S-k@amd.com>");
 MODULE_AUTHOR("Sandeep Singh <Sandeep.singh@amd.com>");
+MODULE_AUTHOR("Basavaraj Natikar <Basavaraj.Natikar@amd.com>");
diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h
index 1ff6f83cb6fd..ae30e059f847 100644
--- a/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h
+++ b/drivers/hid/amd-sfh-hid/amd_sfh_pcie.h
@@ -1,9 +1,10 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * AMD MP2 PCIe communication driver
- * Copyright 2020 Advanced Micro Devices, Inc.
+ * Copyright 2020-2021 Advanced Micro Devices, Inc.
  * Authors: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
  *	    Sandeep Singh <Sandeep.singh@amd.com>
+ *	    Basavaraj Natikar <Basavaraj.Natikar@amd.com>
  */
 
 #ifndef PCIE_MP2_AMD_H
diff --git a/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.c b/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.c
index 0c3697219382..be41f83b0289 100644
--- a/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.c
+++ b/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.c
@@ -1,9 +1,10 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  AMD SFH Report Descriptor generator
- *  Copyright 2020 Advanced Micro Devices, Inc.
+ *  Copyright 2020-2021 Advanced Micro Devices, Inc.
  *  Authors: Nehal Bakulchandra Shah <Nehal-Bakulchandra.Shah@amd.com>
  *	     Sandeep Singh <sandeep.singh@amd.com>
+ *	     Basavaraj Natikar <Basavaraj.Natikar@amd.com>
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.h b/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.h
index 16f563d1823b..70b1b7abe2c6 100644
--- a/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.h
+++ b/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.h
@@ -1,9 +1,10 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * HID report descriptors, structures and routines
- * Copyright 2020 Advanced Micro Devices, Inc.
+ * Copyright 2020-2021 Advanced Micro Devices, Inc.
  * Authors: Nehal Bakulchandra Shah <Nehal-bakulchandra.shah@amd.com>
  *	    Sandeep Singh <Sandeep.singh@amd.com>
+ *	    Basavaraj Natikar <Basavaraj.Natikar@amd.com>
  */
 
 #ifndef AMD_SFH_HID_DESCRIPTOR_H
diff --git a/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_report_desc.h b/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_report_desc.h
index 66d6b26e4708..8d97ca0f9b52 100644
--- a/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_report_desc.h
+++ b/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_report_desc.h
@@ -1,9 +1,10 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * HID  descriptor stuructures
- * Copyright 2020 Advanced Micro Devices, Inc.
+ * Copyright 2020-2021 Advanced Micro Devices, Inc.
  * Authors: Nehal Bakulchandra Shah <Nehal-bakulchandra.shah@amd.com>
  *	    Sandeep Singh <Sandeep.singh@amd.com>
+ *	    Basavaraj Natikar <Basavaraj.Natikar@amd.com>
  */
 
 #ifndef AMD_SFH_HID_REPORT_DESCRIPTOR_H
-- 
2.25.1

Re: [PATCH 0/4] Fixes and updates to amd-sfh driver

[Jiri Kosina]

On Thu, 23 Sep 2021, Basavaraj Natikar wrote:

> Changes include fix to NULL pointer dereference, remove pci_ wrappers,
> use dma_set_mask_and_coherent and copyright updates.
> 
> Basavaraj Natikar (4):
>   amd_sfh: Fix potential NULL pointer dereference
>   amd_sfh: Use dma_set_mask_and_coherent()

Thanks for the patches. My plan is to push the two above as 5.15 material 
(fixes), and queue the 2 below as 5.16 merge window material. Please 
holler if you disagree.

>   amd_sfh: switch from 'pci_' to 'dev_' API
>   amd_sfh: Update Copyright details

-- 
Jiri Kosina
SUSE Labs

Re: [PATCH 0/4] Fixes and updates to amd-sfh driver

[Basavaraj Natikar]

On 9/27/2021 1:16 PM, Jiri Kosina wrote:
> [CAUTION: External Email]
>
> On Thu, 23 Sep 2021, Basavaraj Natikar wrote:
>
>> Changes include fix to NULL pointer dereference, remove pci_ wrappers,
>> use dma_set_mask_and_coherent and copyright updates.
>>
>> Basavaraj Natikar (4):
>>   amd_sfh: Fix potential NULL pointer dereference
>>   amd_sfh: Use dma_set_mask_and_coherent()
> Thanks for the patches. My plan is to push the two above as 5.15 material
> (fixes), and queue the 2 below as 5.16 merge window material. Please
> holler if you disagree.
>
>>   amd_sfh: switch from 'pci_' to 'dev_' API
>>   amd_sfh: Update Copyright details

Makes sense. Appreciate your help.

Thanks,
Basavaraj