[PATCH v1] Bluetooth: btintel: Refactor btintel_set_ppag()

[PATCH v1] Bluetooth: btintel: Refactor btintel_set_ppag()

[Kiran K]

Current flow iterates the ACPI table associated with Bluetooth
controller looking for PPAG method. Method name can be directly passed
to acpi_evaluate_object function instead of iterating the table.

Fixes: c585a92b2f9c ("Bluetooth: btintel: Set Per Platform Antenna Gain(PPAG)")
Signed-off-by: Kiran K <kiran.k@intel.com>
---
 drivers/bluetooth/btintel.c | 119 +++++++++++-------------------------
 1 file changed, 34 insertions(+), 85 deletions(-)

diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
index 0c855c3ee1c1..7ecc67deecb0 100644
--- a/drivers/bluetooth/btintel.c
+++ b/drivers/bluetooth/btintel.c
@@ -26,21 +26,11 @@
 #define ECDSA_OFFSET		644
 #define ECDSA_HEADER_LEN	320
 
-#define BTINTEL_PPAG_NAME   "PPAG"
-
 enum {
 	DSM_SET_WDISABLE2_DELAY = 1,
 	DSM_SET_RESET_METHOD = 3,
 };
 
-/* structure to store the PPAG data read from ACPI table */
-struct btintel_ppag {
-	u32	domain;
-	u32     mode;
-	acpi_status status;
-	struct hci_dev *hdev;
-};
-
 #define CMD_WRITE_BOOT_PARAMS	0xfc0e
 struct cmd_write_boot_params {
 	__le32 boot_addr;
@@ -1324,65 +1314,6 @@ static int btintel_read_debug_features(struct hci_dev *hdev,
 	return 0;
 }
 
-static acpi_status btintel_ppag_callback(acpi_handle handle, u32 lvl, void *data,
-					 void **ret)
-{
-	acpi_status status;
-	size_t len;
-	struct btintel_ppag *ppag = data;
-	union acpi_object *p, *elements;
-	struct acpi_buffer string = {ACPI_ALLOCATE_BUFFER, NULL};
-	struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
-	struct hci_dev *hdev = ppag->hdev;
-
-	status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
-	if (ACPI_FAILURE(status)) {
-		bt_dev_warn(hdev, "PPAG-BT: ACPI Failure: %s", acpi_format_exception(status));
-		return status;
-	}
-
-	len = strlen(string.pointer);
-	if (len < strlen(BTINTEL_PPAG_NAME)) {
-		kfree(string.pointer);
-		return AE_OK;
-	}
-
-	if (strncmp((char *)string.pointer + len - 4, BTINTEL_PPAG_NAME, 4)) {
-		kfree(string.pointer);
-		return AE_OK;
-	}
-	kfree(string.pointer);
-
-	status = acpi_evaluate_object(handle, NULL, NULL, &buffer);
-	if (ACPI_FAILURE(status)) {
-		ppag->status = status;
-		bt_dev_warn(hdev, "PPAG-BT: ACPI Failure: %s", acpi_format_exception(status));
-		return status;
-	}
-
-	p = buffer.pointer;
-	ppag = (struct btintel_ppag *)data;
-
-	if (p->type != ACPI_TYPE_PACKAGE || p->package.count != 2) {
-		kfree(buffer.pointer);
-		bt_dev_warn(hdev, "PPAG-BT: Invalid object type: %d or package count: %d",
-			    p->type, p->package.count);
-		ppag->status = AE_ERROR;
-		return AE_ERROR;
-	}
-
-	elements = p->package.elements;
-
-	/* PPAG table is located at element[1] */
-	p = &elements[1];
-
-	ppag->domain = (u32)p->package.elements[0].integer.value;
-	ppag->mode = (u32)p->package.elements[1].integer.value;
-	ppag->status = AE_OK;
-	kfree(buffer.pointer);
-	return AE_CTRL_TERMINATE;
-}
-
 static int btintel_set_debug_features(struct hci_dev *hdev,
 			       const struct intel_debug_features *features)
 {
@@ -2427,10 +2358,13 @@ static int btintel_configure_offload(struct hci_dev *hdev)
 
 static void btintel_set_ppag(struct hci_dev *hdev, struct intel_version_tlv *ver)
 {
-	struct btintel_ppag ppag;
 	struct sk_buff *skb;
 	struct hci_ppag_enable_cmd ppag_cmd;
 	acpi_handle handle;
+	struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+	union acpi_object *p, *elements;
+	u32 domain, mode;
+	acpi_status status;
 
 	/* PPAG is not supported if CRF is HrP2, Jfp2, JfP1 */
 	switch (ver->cnvr_top & 0xFFF) {
@@ -2448,22 +2382,34 @@ static void btintel_set_ppag(struct hci_dev *hdev, struct intel_version_tlv *ver
 		return;
 	}
 
-	memset(&ppag, 0, sizeof(ppag));
-
-	ppag.hdev = hdev;
-	ppag.status = AE_NOT_FOUND;
-	acpi_walk_namespace(ACPI_TYPE_PACKAGE, handle, 1, NULL,
-			    btintel_ppag_callback, &ppag, NULL);
-
-	if (ACPI_FAILURE(ppag.status)) {
-		if (ppag.status == AE_NOT_FOUND) {
+	status = acpi_evaluate_object(handle, "PPAG", NULL, &buffer);
+	if (ACPI_FAILURE(status)) {
+		if (status == AE_NOT_FOUND) {
 			bt_dev_dbg(hdev, "PPAG-BT: ACPI entry not found");
 			return;
 		}
+		bt_dev_warn(hdev, "PPAG-BT: ACPI Failure: %s", acpi_format_exception(status));
+		return;
+	}
+
+	p = buffer.pointer;
+	if (p->type != ACPI_TYPE_PACKAGE || p->package.count != 2) {
+		bt_dev_warn(hdev, "PPAG-BT: Invalid object type: %d or package count: %d",
+			    p->type, p->package.count);
+		kfree(buffer.pointer);
 		return;
 	}
 
-	if (ppag.domain != 0x12) {
+	elements = p->package.elements;
+
+	/* PPAG table is located at element[1] */
+	p = &elements[1];
+
+	domain = (u32)p->package.elements[0].integer.value;
+	mode = (u32)p->package.elements[1].integer.value;
+	kfree(buffer.pointer);
+
+	if (domain != 0x12) {
 		bt_dev_dbg(hdev, "PPAG-BT: Bluetooth domain is disabled in ACPI firmware");
 		return;
 	}
@@ -2474,19 +2420,22 @@ static void btintel_set_ppag(struct hci_dev *hdev, struct intel_version_tlv *ver
 	 * BIT 1 : 0 Disabled in China
 	 *         1 Enabled in China
 	 */
-	if ((ppag.mode & 0x01) != BIT(0) && (ppag.mode & 0x02) != BIT(1)) {
-		bt_dev_dbg(hdev, "PPAG-BT: EU, China mode are disabled in CB/BIOS");
+	mode &= 0x03;
+
+	if (!mode) {
+		bt_dev_dbg(hdev, "PPAG-BT: EU, China mode are disabled in BIOS");
 		return;
 	}
 
-	ppag_cmd.ppag_enable_flags = cpu_to_le32(ppag.mode);
+	ppag_cmd.ppag_enable_flags = cpu_to_le32(mode);
 
-	skb = __hci_cmd_sync(hdev, INTEL_OP_PPAG_CMD, sizeof(ppag_cmd), &ppag_cmd, HCI_CMD_TIMEOUT);
+	skb = __hci_cmd_sync(hdev, INTEL_OP_PPAG_CMD, sizeof(ppag_cmd),
+			     &ppag_cmd, HCI_CMD_TIMEOUT);
 	if (IS_ERR(skb)) {
 		bt_dev_warn(hdev, "Failed to send PPAG Enable (%ld)", PTR_ERR(skb));
 		return;
 	}
-	bt_dev_info(hdev, "PPAG-BT: Enabled (Mode %d)", ppag.mode);
+	bt_dev_info(hdev, "PPAG-BT: Enabled (Mode %d)", mode);
 	kfree_skb(skb);
 }
 
-- 
2.40.1

RE: [v1] Bluetooth: btintel: Refactor btintel_set_ppag()

[bluez.test.bot]

[-- Attachment #1: Type: text/plain, Size: 2312 bytes --]

This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=853679

---Test result---

Test Summary:
CheckPatch                    PASS      0.80 seconds
GitLint                       PASS      0.33 seconds
SubjectPrefix                 PASS      0.13 seconds
BuildKernel                   PASS      30.21 seconds
CheckAllWarning               PASS      33.26 seconds
CheckSparse                   PASS      38.70 seconds
CheckSmatch                   FAIL      35.43 seconds
BuildKernel32                 PASS      29.21 seconds
TestRunnerSetup               PASS      527.23 seconds
TestRunner_l2cap-tester       PASS      20.41 seconds
TestRunner_iso-tester         PASS      30.76 seconds
TestRunner_bnep-tester        PASS      4.81 seconds
TestRunner_mgmt-tester        PASS      112.80 seconds
TestRunner_rfcomm-tester      PASS      7.38 seconds
TestRunner_sco-tester         PASS      15.02 seconds
TestRunner_ioctl-tester       PASS      7.80 seconds
TestRunner_mesh-tester        PASS      5.84 seconds
TestRunner_smp-tester         PASS      6.90 seconds
TestRunner_userchan-tester    PASS      4.95 seconds
IncrementalBuild              PASS      28.10 seconds

Details
##############################
Test: CheckSmatch - FAIL
Desc: Run smatch tool with source
Output:

Segmentation fault (core dumped)
make[4]: *** [scripts/Makefile.build:244: net/bluetooth/hci_core.o] Error 139
make[4]: *** Deleting file 'net/bluetooth/hci_core.o'
make[3]: *** [scripts/Makefile.build:485: net/bluetooth] Error 2
make[2]: *** [scripts/Makefile.build:485: net] Error 2
make[2]: *** Waiting for unfinished jobs....
Segmentation fault (core dumped)
make[4]: *** [scripts/Makefile.build:244: drivers/bluetooth/bcm203x.o] Error 139
make[4]: *** Deleting file 'drivers/bluetooth/bcm203x.o'
make[4]: *** Waiting for unfinished jobs....
make[3]: *** [scripts/Makefile.build:485: drivers/bluetooth] Error 2
make[2]: *** [scripts/Makefile.build:485: drivers] Error 2
make[1]: *** [/github/workspace/src/src/Makefile:1919: .] Error 2
make: *** [Makefile:240: __sub-make] Error 2


---
Regards,
Linux Bluetooth

Re: [PATCH v1] Bluetooth: btintel: Refactor btintel_set_ppag()

[patchwork-bot+bluetooth]

Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@intel.com>:

On Thu, 16 May 2024 17:54:36 +0530 you wrote:
> Current flow iterates the ACPI table associated with Bluetooth
> controller looking for PPAG method. Method name can be directly passed
> to acpi_evaluate_object function instead of iterating the table.
> 
> Fixes: c585a92b2f9c ("Bluetooth: btintel: Set Per Platform Antenna Gain(PPAG)")
> Signed-off-by: Kiran K <kiran.k@intel.com>
> 
> [...]

Here is the summary with links:
  - [v1] Bluetooth: btintel: Refactor btintel_set_ppag()
    https://git.kernel.org/bluetooth/bluetooth-next/c/287da9035b2e

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html