diff mbox series

[2/6] Bluetooth: hci_qca: schedule a devm action for disabling the clock

Message ID 20240705-hci_qca_refactor-v1-2-e2442121c13e@linaro.org
State Superseded
Headers show
Series Bluetooth: hci_qca: use the power sequencer for wcn7850 | expand

Commit Message

Bartosz Golaszewski July 5, 2024, 8:26 p.m. UTC 
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

In preparation for unduplicating the hci_uart registration code,
schedule a devres action for disabling the SUSCLK rather than doing it
manually.

We cannot really use devm_clk_get_enabled() as we also set the rate
before enabling the clock. While this should in theory work, I don't
want to risk breaking existing users. One solution for the future is to
add devm_clk_get_enabled_with_rate() to the clock framework.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/bluetooth/hci_qca.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

Comments

kernel test robot July 6, 2024, 11:05 p.m. UTC | #1 
Hi Bartosz,

kernel test robot noticed the following build errors:

[auto build test ERROR on 0b58e108042b0ed28a71cd7edf5175999955b233]

url:    https://github.com/intel-lab-lkp/linux/commits/Bartosz-Golaszewski/dt-bindings-bluetooth-qualcomm-describe-the-inputs-from-PMU-for-wcn7850/20240706-055822
base:   0b58e108042b0ed28a71cd7edf5175999955b233
patch link:    https://lore.kernel.org/r/20240705-hci_qca_refactor-v1-2-e2442121c13e%40linaro.org
patch subject: [PATCH 2/6] Bluetooth: hci_qca: schedule a devm action for disabling the clock
config: i386-buildonly-randconfig-006-20240707 (https://download.01.org/0day-ci/archive/20240707/202407070656.wRERdKMy-lkp@intel.com/config)
compiler: gcc-9 (Ubuntu 9.5.0-4ubuntu2) 9.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240707/202407070656.wRERdKMy-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202407070656.wRERdKMy-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/bluetooth/hci_qca.c: In function 'qca_serdev_remove':
>> drivers/bluetooth/hci_qca.c:2498:2: error: label at end of compound statement
    2498 |  default:
         |  ^~~~~~~


vim +2498 drivers/bluetooth/hci_qca.c

05ba533c5c1155 Thierry Escande                2018-03-29  2478  
05ba533c5c1155 Thierry Escande                2018-03-29  2479  static void qca_serdev_remove(struct serdev_device *serdev)
05ba533c5c1155 Thierry Escande                2018-03-29  2480  {
05ba533c5c1155 Thierry Escande                2018-03-29  2481  	struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
054ec5e94a46b0 Venkata Lakshmi Narayana Gubba 2020-09-10  2482  	struct qca_power *power = qcadev->bt_power;
05ba533c5c1155 Thierry Escande                2018-03-29  2483  
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2484  	switch (qcadev->btsoc_type) {
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2485  	case QCA_WCN3988:
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2486  	case QCA_WCN3990:
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2487  	case QCA_WCN3991:
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2488  	case QCA_WCN3998:
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2489  	case QCA_WCN6750:
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2490  	case QCA_WCN6855:
e0c1278ac89b03 Neil Armstrong                 2023-08-16  2491  	case QCA_WCN7850:
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2492  		if (power->vregs_on) {
c2d7827338618a Balakrishna Godavarthi         2018-08-22  2493  			qca_power_shutdown(&qcadev->serdev_hu);
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2494  			break;
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2495  		}
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2496  		fallthrough;
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2497  
691d54d0f7cb14 Neil Armstrong                 2023-08-16 @2498  	default:
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2499  	}
fa9ad876b8e0eb Balakrishna Godavarthi         2018-08-03  2500  
fa9ad876b8e0eb Balakrishna Godavarthi         2018-08-03  2501  	hci_uart_unregister_device(&qcadev->serdev_hu);
05ba533c5c1155 Thierry Escande                2018-03-29  2502  }
05ba533c5c1155 Thierry Escande                2018-03-29  2503
kernel test robot July 6, 2024, 11:27 p.m. UTC | #2 
Hi Bartosz,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 0b58e108042b0ed28a71cd7edf5175999955b233]

url:    https://github.com/intel-lab-lkp/linux/commits/Bartosz-Golaszewski/dt-bindings-bluetooth-qualcomm-describe-the-inputs-from-PMU-for-wcn7850/20240706-055822
base:   0b58e108042b0ed28a71cd7edf5175999955b233
patch link:    https://lore.kernel.org/r/20240705-hci_qca_refactor-v1-2-e2442121c13e%40linaro.org
patch subject: [PATCH 2/6] Bluetooth: hci_qca: schedule a devm action for disabling the clock
config: hexagon-allyesconfig (https://download.01.org/0day-ci/archive/20240707/202407070754.L1XER9qH-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project a0c6b8aef853eedaa0980f07c0a502a5a8a9740e)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240707/202407070754.L1XER9qH-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202407070754.L1XER9qH-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/bluetooth/hci_qca.c:23:
   In file included from include/linux/devcoredump.h:12:
   In file included from include/linux/scatterlist.h:8:
   In file included from include/linux/mm.h:2229:
   include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   In file included from drivers/bluetooth/hci_qca.c:23:
   In file included from include/linux/devcoredump.h:12:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     548 |         val = __raw_readb(PCI_IOBASE + addr);
         |                           ~~~~~~~~~~ ^
   include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     561 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
      37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
         |                                                   ^
   In file included from drivers/bluetooth/hci_qca.c:23:
   In file included from include/linux/devcoredump.h:12:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     574 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
      35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
         |                                                   ^
   In file included from drivers/bluetooth/hci_qca.c:23:
   In file included from include/linux/devcoredump.h:12:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     585 |         __raw_writeb(value, PCI_IOBASE + addr);
         |                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     595 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     605 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
>> drivers/bluetooth/hci_qca.c:2499:2: warning: label at end of compound statement is a C23 extension [-Wc23-extensions]
    2499 |         }
         |         ^
   8 warnings generated.


vim +2499 drivers/bluetooth/hci_qca.c

05ba533c5c1155 Thierry Escande                2018-03-29  2478  
05ba533c5c1155 Thierry Escande                2018-03-29  2479  static void qca_serdev_remove(struct serdev_device *serdev)
05ba533c5c1155 Thierry Escande                2018-03-29  2480  {
05ba533c5c1155 Thierry Escande                2018-03-29  2481  	struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
054ec5e94a46b0 Venkata Lakshmi Narayana Gubba 2020-09-10  2482  	struct qca_power *power = qcadev->bt_power;
05ba533c5c1155 Thierry Escande                2018-03-29  2483  
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2484  	switch (qcadev->btsoc_type) {
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2485  	case QCA_WCN3988:
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2486  	case QCA_WCN3990:
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2487  	case QCA_WCN3991:
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2488  	case QCA_WCN3998:
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2489  	case QCA_WCN6750:
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2490  	case QCA_WCN6855:
e0c1278ac89b03 Neil Armstrong                 2023-08-16  2491  	case QCA_WCN7850:
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2492  		if (power->vregs_on) {
c2d7827338618a Balakrishna Godavarthi         2018-08-22  2493  			qca_power_shutdown(&qcadev->serdev_hu);
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2494  			break;
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2495  		}
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2496  		fallthrough;
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2497  
691d54d0f7cb14 Neil Armstrong                 2023-08-16  2498  	default:
691d54d0f7cb14 Neil Armstrong                 2023-08-16 @2499  	}
fa9ad876b8e0eb Balakrishna Godavarthi         2018-08-03  2500  
fa9ad876b8e0eb Balakrishna Godavarthi         2018-08-03  2501  	hci_uart_unregister_device(&qcadev->serdev_hu);
05ba533c5c1155 Thierry Escande                2018-03-29  2502  }
05ba533c5c1155 Thierry Escande                2018-03-29  2503
diff mbox series

Patch

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index bc6a49ba26f9..895ce8e11da8 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -2295,6 +2295,13 @@  static int qca_init_regulators(struct qca_power *qca,
 	return 0;
 }
 
+static void qca_clk_disable_unprepare(void *data)
+{
+	struct clk *clk = data;
+
+	clk_disable_unprepare(clk);
+}
+
 static int qca_serdev_probe(struct serdev_device *serdev)
 {
 	struct qca_serdev *qcadev;
@@ -2434,10 +2441,15 @@  static int qca_serdev_probe(struct serdev_device *serdev)
 		if (err)
 			return err;
 
+		err = devm_add_action_or_reset(&serdev->dev,
+					       qca_clk_disable_unprepare,
+					       qcadev->susclk);
+		if (err)
+			return err;
+
 		err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
 		if (err) {
 			BT_ERR("Rome serdev registration failed");
-			clk_disable_unprepare(qcadev->susclk);
 			return err;
 		}
 	}
@@ -2484,8 +2496,6 @@  static void qca_serdev_remove(struct serdev_device *serdev)
 		fallthrough;
 
 	default:
-		if (qcadev->susclk)
-			clk_disable_unprepare(qcadev->susclk);
 	}
 
 	hci_uart_unregister_device(&qcadev->serdev_hu);