diff mbox series

ACPI: power: Use acpi_handle_debug() to pring debug messages

Message ID 2612145.mvXUDI8C0e@kreacher
State New
Headers show
Series ACPI: power: Use acpi_handle_debug() to pring debug messages | expand

Commit Message

Rafael J. Wysocki Aug. 24, 2021, 3:17 p.m. UTC 
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Use acpi_handle_debug() to print diagnostic messages regarding ACPI
power resources so as to make it easier to correlate the kernel
messages with the power resource objects in the ACPI namespace that
they are about.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/power.c |   23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

Comments

kernel test robot Aug. 25, 2021, 8:48 a.m. UTC | #1 
Hi "Rafael,

I love your patch! Perhaps something to improve:

[auto build test WARNING on pm/linux-next]
[also build test WARNING on linus/master v5.14-rc7 next-20210824]
[cannot apply to linux/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Rafael-J-Wysocki/ACPI-power-Use-acpi_handle_debug-to-pring-debug-messages/20210824-231858
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: x86_64-randconfig-c007-20210824 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d26000e4cc2bc65e207a84fa26cb6e374d60aa12)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/055f14fe49e9668695c38bec833ba2ba599df466
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Rafael-J-Wysocki/ACPI-power-Use-acpi_handle_debug-to-pring-debug-messages/20210824-231858
        git checkout 055f14fe49e9668695c38bec833ba2ba599df466
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 clang-analyzer 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


clang-analyzer warnings: (new ones prefixed by >>)
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   arch/x86/kernel/cpu/mtrr/generic.c:427:2: warning: Value stored to 'high_width' is never read [clang-analyzer-deadcode.DeadStores]
           high_width = (__ffs64(size_or_mask) - (32 - PAGE_SHIFT) + 3) / 4;
           ^            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/x86/kernel/cpu/mtrr/generic.c:427:2: note: Value stored to 'high_width' is never read
           high_width = (__ffs64(size_or_mask) - (32 - PAGE_SHIFT) + 3) / 4;
           ^            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   arch/x86/kernel/cpu/mtrr/cleanup.c:950:4: warning: Value stored to 'highest_pfn' is never read [clang-analyzer-deadcode.DeadStores]
                           highest_pfn = range[nr_range].end;
                           ^             ~~~~~~~~~~~~~~~~~~~
   arch/x86/kernel/cpu/mtrr/cleanup.c:950:4: note: Value stored to 'highest_pfn' is never read
                           highest_pfn = range[nr_range].end;
                           ^             ~~~~~~~~~~~~~~~~~~~
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   5 warnings generated.
>> drivers/acpi/power.c:436:14: warning: Value stored to 'handle' during its initialization is never read [clang-analyzer-deadcode.DeadStores]

           acpi_handle handle = resource->device.handle;
                       ^~~~~~   ~~~~~~~~~~~~~~~~~~~~~~~
   drivers/acpi/power.c:436:14: note: Value stored to 'handle' during its initialization is never read
           acpi_handle handle = resource->device.handle;
                       ^~~~~~   ~~~~~~~~~~~~~~~~~~~~~~~
   drivers/acpi/power.c:956:2: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
           strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME);
           ^~~~~~
   drivers/acpi/power.c:956:2: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
           strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME);
           ^~~~~~
   drivers/acpi/power.c:957:2: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
           strcpy(acpi_device_class(device), ACPI_POWER_CLASS);
           ^~~~~~
   drivers/acpi/power.c:957:2: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
           strcpy(acpi_device_class(device), ACPI_POWER_CLASS);
           ^~~~~~
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   drivers/acpi/bus.c:1257:2: warning: Value stored to 'status' is never read [clang-analyzer-deadcode.DeadStores]
           status = acpi_install_table_handler(acpi_bus_table_handler, NULL);
           ^        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/acpi/bus.c:1257:2: note: Value stored to 'status' is never read
           status = acpi_install_table_handler(acpi_bus_table_handler, NULL);
           ^        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   drivers/acpi/glue.c:161:3: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
                   strcpy(buf, PHYSICAL_NODE_STRING);
                   ^~~~~~
   drivers/acpi/glue.c:161:3: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
                   strcpy(buf, PHYSICAL_NODE_STRING);
                   ^~~~~~
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   10 warnings generated.
   drivers/acpi/scan.c:1102:3: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
                   strcpy(device->pnp.bus_id, "ACPI");
                   ^~~~~~
   drivers/acpi/scan.c:1102:3: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
                   strcpy(device->pnp.bus_id, "ACPI");
                   ^~~~~~
   drivers/acpi/scan.c:1108:3: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
                   strcpy(device->pnp.bus_id, "PWRF");
                   ^~~~~~
   drivers/acpi/scan.c:1108:3: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
                   strcpy(device->pnp.bus_id, "PWRF");
                   ^~~~~~
   drivers/acpi/scan.c:1111:3: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
                   strcpy(device->pnp.bus_id, "SLPF");
                   ^~~~~~
   drivers/acpi/scan.c:1111:3: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
                   strcpy(device->pnp.bus_id, "SLPF");
                   ^~~~~~
   drivers/acpi/scan.c:1114:3: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
                   strcpy(device->pnp.bus_id, "ECDT");
                   ^~~~~~
   drivers/acpi/scan.c:1114:3: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
                   strcpy(device->pnp.bus_id, "ECDT");
                   ^~~~~~
   drivers/acpi/scan.c:1125:3: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
                   strcpy(device->pnp.bus_id, bus_id);
                   ^~~~~~
   drivers/acpi/scan.c:1125:3: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
                   strcpy(device->pnp.bus_id, bus_id);
                   ^~~~~~
   drivers/acpi/scan.c:1373:4: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
                           strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME);
                           ^~~~~~
   drivers/acpi/scan.c:1373:4: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
                           strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME);
                           ^~~~~~
   drivers/acpi/scan.c:1374:4: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
                           strcpy(pnp->device_class, ACPI_BUS_CLASS);
                           ^~~~~~
   drivers/acpi/scan.c:1374:4: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
                           strcpy(pnp->device_class, ACPI_BUS_CLASS);
                           ^~~~~~
   drivers/acpi/scan.c:2143:29: warning: Dereference of null pointer [clang-analyzer-core.NullDereference]
           bool skip = !first_pass && device->flags.visited;
                                      ^
   drivers/acpi/scan.c:2614:2: note: Calling 'acpi_bus_scan'
           acpi_bus_scan(ACPI_ROOT_OBJECT);

vim +/handle +436 drivers/acpi/power.c

   433	
   434	static int acpi_power_off_unlocked(struct acpi_power_resource *resource)
   435	{
 > 436		acpi_handle handle = resource->device.handle;

   437		int result = 0;
   438	
   439		if (!resource->ref_count) {
   440			acpi_handle_debug(handle, "Power resource already off\n");
   441			return 0;
   442		}
   443	
   444		if (--resource->ref_count) {
   445			acpi_handle_debug(handle, "Power resource still in use\n");
   446		} else {
   447			result = __acpi_power_off(resource);
   448			if (result)
   449				resource->ref_count++;
   450		}
   451		return result;
   452	}
   453	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
diff mbox series

Patch

Index: linux-pm/drivers/acpi/power.c
===================================================================
--- linux-pm.orig/drivers/acpi/power.c
+++ linux-pm/drivers/acpi/power.c
@@ -356,10 +356,11 @@  void acpi_device_power_remove_dependent(
 
 static int __acpi_power_on(struct acpi_power_resource *resource)
 {
+	acpi_handle handle = resource->device.handle;
 	struct acpi_power_dependent_device *dep;
 	acpi_status status = AE_OK;
 
-	status = acpi_evaluate_object(resource->device.handle, "_ON", NULL, NULL);
+	status = acpi_evaluate_object(handle, "_ON", NULL, NULL);
 	if (ACPI_FAILURE(status)) {
 		resource->state = ACPI_POWER_RESOURCE_STATE_UNKNOWN;
 		return -ENODEV;
@@ -367,7 +368,7 @@  static int __acpi_power_on(struct acpi_p
 
 	resource->state = ACPI_POWER_RESOURCE_STATE_ON;
 
-	pr_debug("Power resource [%s] turned on\n", resource->name);
+	acpi_handle_debug(handle,"Power resource turned on\n");
 
 	/*
 	 * If there are other dependents on this power resource we need to
@@ -392,7 +393,8 @@  static int acpi_power_on_unlocked(struct
 	int result = 0;
 
 	if (resource->ref_count++) {
-		pr_debug("Power resource [%s] already on\n", resource->name);
+		acpi_handle_debug(resource->device.handle,
+				  "Power resource already on\n");
 	} else {
 		result = __acpi_power_on(resource);
 		if (result)
@@ -413,10 +415,10 @@  static int acpi_power_on(struct acpi_pow
 
 static int __acpi_power_off(struct acpi_power_resource *resource)
 {
+	acpi_handle handle = resource->device.handle;
 	acpi_status status;
 
-	status = acpi_evaluate_object(resource->device.handle, "_OFF",
-				      NULL, NULL);
+	status = acpi_evaluate_object(handle, "_OFF", NULL, NULL);
 	if (ACPI_FAILURE(status)) {
 		resource->state = ACPI_POWER_RESOURCE_STATE_UNKNOWN;
 		return -ENODEV;
@@ -424,22 +426,23 @@  static int __acpi_power_off(struct acpi_
 
 	resource->state = ACPI_POWER_RESOURCE_STATE_OFF;
 
-	pr_debug("Power resource [%s] turned off\n", resource->name);
+	acpi_handle_debug(handle, "Power resource turned off\n");
 
 	return 0;
 }
 
 static int acpi_power_off_unlocked(struct acpi_power_resource *resource)
 {
+	acpi_handle handle = resource->device.handle;
 	int result = 0;
 
 	if (!resource->ref_count) {
-		pr_debug("Power resource [%s] already off\n", resource->name);
+		acpi_handle_debug(handle, "Power resource already off\n");
 		return 0;
 	}
 
 	if (--resource->ref_count) {
-		pr_debug("Power resource [%s] still in use\n", resource->name);
+		acpi_handle_debug(handle, "Power resource still in use\n");
 	} else {
 		result = __acpi_power_off(resource);
 		if (result)
@@ -1004,7 +1007,7 @@  void acpi_resume_power_resources(void)
 
 		if (state == ACPI_POWER_RESOURCE_STATE_OFF
 		    && resource->ref_count) {
-			dev_dbg(&resource->device.dev, "Turning ON\n");
+			acpi_handle_debug(resource->device.handle, "Turning ON\n");
 			__acpi_power_on(resource);
 		}
 
@@ -1034,7 +1037,7 @@  void acpi_turn_off_unused_power_resource
 		 */
 		if (!resource->ref_count &&
 		    resource->state != ACPI_POWER_RESOURCE_STATE_OFF) {
-			dev_dbg(&resource->device.dev, "Turning OFF\n");
+			acpi_handle_debug(resource->device.handle, "Turning OFF\n");
 			__acpi_power_off(resource);
 		}