Hi,
I had submitted this patch sometime earlier. Submitting again after
fixing a bug in the patch.
I have not subscribed to linux-acpi. please CC me in replies.
Regards,
Om.
Signed Off by : Om Narasimhan <[email protected]>
--
drivers/acpi/ac.c | 4 +---
drivers/acpi/acpi_memhotplug.c | 14 ++++----------
drivers/acpi/asus_acpi.c | 3 +--
drivers/acpi/battery.c | 13 +++----------
drivers/acpi/bus.c | 3 +--
drivers/acpi/button.c | 4 +---
drivers/acpi/container.c | 4 +---
drivers/acpi/ec.c | 20 +++++---------------
drivers/acpi/fan.c | 3 +--
drivers/acpi/i2c_ec.c | 8 ++------
drivers/acpi/osl.c | 2 +-
drivers/acpi/pci_bind.c | 21 +++++----------------
drivers/acpi/pci_irq.c | 16 +++-------------
drivers/acpi/pci_link.c | 6 ++----
drivers/acpi/pci_root.c | 3 +--
drivers/acpi/power.c | 4 +---
drivers/acpi/processor_core.c | 4 +---
drivers/acpi/sbs.c | 4 +---
drivers/acpi/thermal.c | 13 +++----------
drivers/acpi/utils.c | 2 --
20 files changed, 38 insertions(+), 113 deletions(-)
diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index 11abc7b..0d05d36 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -221,11 +221,9 @@ static int acpi_ac_add(struct acpi_devic
if (!device)
return -EINVAL;
- ac = kmalloc(sizeof(struct acpi_ac), GFP_KERNEL);
+ ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
if (!ac)
return -ENOMEM;
- memset(ac, 0, sizeof(struct acpi_ac));
-
ac->device = device;
strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_AC_CLASS);
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 1dda370..4b1a77d 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -292,7 +292,6 @@ static int acpi_memory_disable_device(st
int result;
struct acpi_memory_info *info, *n;
-
/*
* Ask the VM to offline this memory range.
* Note: Assume that this function returns zero on success
@@ -323,7 +322,6 @@ static void acpi_memory_device_notify(ac
struct acpi_memory_device *mem_device;
struct acpi_device *device;
-
switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
@@ -376,7 +374,6 @@ static void acpi_memory_device_notify(ac
"Unsupported event [0x%x]\n", event));
break;
}
-
return;
}
@@ -385,15 +382,12 @@ static int acpi_memory_device_add(struct
int result;
struct acpi_memory_device *mem_device = NULL;
-
if (!device)
return -EINVAL;
- mem_device = kmalloc(sizeof(struct acpi_memory_device), GFP_KERNEL);
+ mem_device = kzalloc(sizeof(struct acpi_memory_device), GFP_KERNEL);
if (!mem_device)
return -ENOMEM;
- memset(mem_device, 0, sizeof(struct acpi_memory_device));
-
INIT_LIST_HEAD(&mem_device->res_list);
mem_device->device = device;
sprintf(acpi_device_name(device), "%s", ACPI_MEMORY_DEVICE_NAME);
@@ -418,14 +412,14 @@ static int acpi_memory_device_add(struct
static int acpi_memory_device_remove(struct acpi_device *device, int type)
{
struct acpi_memory_device *mem_device = NULL;
-
+ struct acpi_memory_info *info, *n;
if (!device || !acpi_driver_data(device))
return -EINVAL;
-
mem_device = (struct acpi_memory_device *)acpi_driver_data(device);
+ list_for_each_entry_safe(info, n, &mem_device->res_list, list)
+ kfree(info);
kfree(mem_device);
-
return 0;
}
diff --git a/drivers/acpi/asus_acpi.c b/drivers/acpi/asus_acpi.c
index e9ee4c5..937d9a4 100644
--- a/drivers/acpi/asus_acpi.c
+++ b/drivers/acpi/asus_acpi.c
@@ -1246,10 +1246,9 @@ static int asus_hotk_add(struct acpi_dev
ASUS_ACPI_VERSION);
hotk =
- (struct asus_hotk *)kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
+ (struct asus_hotk *)kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
if (!hotk)
return -ENOMEM;
- memset(hotk, 0, sizeof(struct asus_hotk));
hotk->handle = device->handle;
strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 9810e2a..798413e 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -158,13 +158,11 @@ acpi_battery_get_info(struct acpi_batter
goto end;
}
- data.pointer = kmalloc(data.length, GFP_KERNEL);
+ data.pointer = kzalloc(data.length, GFP_KERNEL);
if (!data.pointer) {
result = -ENOMEM;
goto end;
}
- memset(data.pointer, 0, data.length);
-
status = acpi_extract_package(package, &format, &data);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Extracting _BIF"));
@@ -218,13 +216,11 @@ acpi_battery_get_status(struct acpi_batt
goto end;
}
- data.pointer = kmalloc(data.length, GFP_KERNEL);
+ data.pointer = kzalloc(data.length, GFP_KERNEL);
if (!data.pointer) {
result = -ENOMEM;
goto end;
}
- memset(data.pointer, 0, data.length);
-
status = acpi_extract_package(package, &format, &data);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Extracting _BST"));
@@ -692,11 +688,9 @@ static int acpi_battery_add(struct acpi_
if (!device)
return -EINVAL;
- battery = kmalloc(sizeof(struct acpi_battery), GFP_KERNEL);
+ battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
if (!battery)
return -ENOMEM;
- memset(battery, 0, sizeof(struct acpi_battery));
-
battery->device = device;
strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
@@ -727,7 +721,6 @@ static int acpi_battery_add(struct acpi_
acpi_battery_remove_fs(device);
kfree(battery);
}
-
return result;
}
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 279c4ba..8a23498 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -290,7 +290,6 @@ int acpi_bus_generate_event(struct acpi_
struct acpi_bus_event *event = NULL;
unsigned long flags = 0;
-
if (!device)
return -EINVAL;
@@ -298,7 +297,7 @@ int acpi_bus_generate_event(struct acpi_
if (!event_is_open)
return 0;
- event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC);
+ event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC);
if (!event)
return -ENOMEM;
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index 5ef885e..bec7520 100644
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -296,11 +296,9 @@ static int acpi_button_add(struct acpi_d
if (!device)
return -EINVAL;
- button = kmalloc(sizeof(struct acpi_button), GFP_KERNEL);
+ button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
if (!button)
return -ENOMEM;
- memset(button, 0, sizeof(struct acpi_button));
-
button->device = device;
acpi_driver_data(device) = button;
diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c
index 871aa52..322d60e 100644
--- a/drivers/acpi/container.c
+++ b/drivers/acpi/container.c
@@ -96,11 +96,9 @@ static int acpi_container_add(struct acp
return -EINVAL;
}
- container = kmalloc(sizeof(struct acpi_container), GFP_KERNEL);
+ container = kzalloc(sizeof(struct acpi_container), GFP_KERNEL);
if (!container)
return -ENOMEM;
-
- memset(container, 0, sizeof(struct acpi_container));
container->handle = device->handle;
strcpy(acpi_device_name(device), ACPI_CONTAINER_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_CONTAINER_CLASS);
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index e5d7963..6c24b62 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -988,11 +988,9 @@ static int acpi_ec_poll_add(struct acpi_
if (!device)
return -EINVAL;
- ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
+ ec = kzalloc(sizeof(union acpi_ec), GFP_KERNEL);
if (!ec)
return -ENOMEM;
- memset(ec, 0, sizeof(union acpi_ec));
-
ec->common.handle = device->handle;
ec->common.uid = -1;
init_MUTEX(&ec->poll.sem);
@@ -1055,11 +1053,9 @@ static int acpi_ec_intr_add(struct acpi_
if (!device)
return -EINVAL;
- ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
+ ec = kzalloc(sizeof(union acpi_ec), GFP_KERNEL);
if (!ec)
return -ENOMEM;
- memset(ec, 0, sizeof(union acpi_ec));
-
ec->common.handle = device->handle;
ec->common.uid = -1;
atomic_set(&ec->intr.pending_gpe, 0);
@@ -1342,13 +1338,11 @@ static int __init acpi_ec_fake_ecdt(void
printk(KERN_INFO PREFIX "Try to make an fake ECDT\n");
- ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
+ ec_ecdt = kzalloc(sizeof(union acpi_ec), GFP_KERNEL);
if (!ec_ecdt) {
ret = -ENOMEM;
goto error;
}
- memset(ec_ecdt, 0, sizeof(union acpi_ec));
-
status = acpi_get_devices(ACPI_EC_HID,
acpi_fake_ecdt_callback, NULL, NULL);
if (ACPI_FAILURE(status)) {
@@ -1387,11 +1381,9 @@ static int __init acpi_ec_poll_get_real_
/*
* Generate a temporary ec context to use until the namespace is scanned
*/
- ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
+ ec_ecdt = kzalloc(sizeof(union acpi_ec), GFP_KERNEL);
if (!ec_ecdt)
return -ENOMEM;
- memset(ec_ecdt, 0, sizeof(union acpi_ec));
-
ec_ecdt->common.command_addr = ecdt_ptr->ec_control;
ec_ecdt->common.status_addr = ecdt_ptr->ec_control;
ec_ecdt->common.data_addr = ecdt_ptr->ec_data;
@@ -1432,11 +1424,9 @@ static int __init acpi_ec_intr_get_real_
/*
* Generate a temporary ec context to use until the namespace is scanned
*/
- ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
+ ec_ecdt = kzalloc(sizeof(union acpi_ec), GFP_KERNEL);
if (!ec_ecdt)
return -ENOMEM;
- memset(ec_ecdt, 0, sizeof(union acpi_ec));
-
init_MUTEX(&ec_ecdt->intr.sem);
init_waitqueue_head(&ec_ecdt->intr.wait);
ec_ecdt->common.command_addr = ecdt_ptr->ec_control;
diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index 045c894..9e73c98 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -186,10 +186,9 @@ static int acpi_fan_add(struct acpi_devi
if (!device)
return -EINVAL;
- fan = kmalloc(sizeof(struct acpi_fan), GFP_KERNEL);
+ fan = kzalloc(sizeof(struct acpi_fan), GFP_KERNEL);
if (!fan)
return -ENOMEM;
- memset(fan, 0, sizeof(struct acpi_fan));
fan->device = device;
strcpy(acpi_device_name(device), "Fan");
diff --git a/drivers/acpi/i2c_ec.c b/drivers/acpi/i2c_ec.c
index 6809c28..f25d700 100644
--- a/drivers/acpi/i2c_ec.c
+++ b/drivers/acpi/i2c_ec.c
@@ -309,19 +309,15 @@ static int acpi_ec_hc_add(struct acpi_de
return -EINVAL;
}
- ec_hc = kmalloc(sizeof(struct acpi_ec_hc), GFP_KERNEL);
+ ec_hc = kzalloc(sizeof(struct acpi_ec_hc), GFP_KERNEL);
if (!ec_hc) {
return -ENOMEM;
}
- memset(ec_hc, 0, sizeof(struct acpi_ec_hc));
-
- smbus = kmalloc(sizeof(struct acpi_ec_smbus), GFP_KERNEL);
+ smbus = kzalloc(sizeof(struct acpi_ec_smbus), GFP_KERNEL);
if (!smbus) {
kfree(ec_hc);
return -ENOMEM;
}
- memset(smbus, 0, sizeof(struct acpi_ec_smbus));
-
ec_hc->handle = device->handle;
strcpy(acpi_device_name(device), ACPI_EC_HC_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_EC_HC_CLASS);
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 507f051..544d9ae 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -625,7 +625,7 @@ acpi_status acpi_os_execute(acpi_execute
*/
dpc =
- kmalloc(sizeof(struct acpi_os_dpc) + sizeof(struct work_struct),
+ kzalloc(sizeof(struct acpi_os_dpc) + sizeof(struct work_struct),
GFP_ATOMIC);
if (!dpc)
return_ACPI_STATUS(AE_NO_MEMORY);
diff --git a/drivers/acpi/pci_bind.c b/drivers/acpi/pci_bind.c
index 1e2ae6e..ec55b3b 100644
--- a/drivers/acpi/pci_bind.c
+++ b/drivers/acpi/pci_bind.c
@@ -122,20 +122,17 @@ int acpi_pci_bind(struct acpi_device *de
if (!device || !device->parent)
return -EINVAL;
- pathname = kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
+ pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
if (!pathname)
return -ENOMEM;
- memset(pathname, 0, ACPI_PATHNAME_MAX);
buffer.length = ACPI_PATHNAME_MAX;
buffer.pointer = pathname;
- data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
+ data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
if (!data) {
kfree(pathname);
return -ENOMEM;
}
- memset(data, 0, sizeof(struct acpi_pci_data));
-
acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n",
pathname));
@@ -277,15 +274,12 @@ int acpi_pci_unbind(struct acpi_device *
char *pathname = NULL;
struct acpi_buffer buffer = { 0, NULL };
-
if (!device || !device->parent)
return -EINVAL;
- pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
+ pathname = (char *)kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
if (!pathname)
return -ENOMEM;
- memset(pathname, 0, ACPI_PATHNAME_MAX);
-
buffer.length = ACPI_PATHNAME_MAX;
buffer.pointer = pathname;
acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
@@ -332,11 +326,9 @@ acpi_pci_bind_root(struct acpi_device *d
struct acpi_buffer buffer = { 0, NULL };
- pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
+ pathname = (char *)kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
if (!pathname)
return -ENOMEM;
- memset(pathname, 0, ACPI_PATHNAME_MAX);
-
buffer.length = ACPI_PATHNAME_MAX;
buffer.pointer = pathname;
@@ -345,13 +337,11 @@ acpi_pci_bind_root(struct acpi_device *d
return -EINVAL;
}
- data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
+ data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
if (!data) {
kfree(pathname);
return -ENOMEM;
}
- memset(data, 0, sizeof(struct acpi_pci_data));
-
data->id = *id;
data->bus = bus;
device->ops.bind = acpi_pci_bind;
@@ -375,6 +365,5 @@ acpi_pci_bind_root(struct acpi_device *d
kfree(pathname);
if (result != 0)
kfree(data);
-
return result;
}
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index feda034..b64c50a 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -85,21 +85,14 @@ acpi_pci_irq_add_entry(acpi_handle handl
{
struct acpi_prt_entry *entry = NULL;
-
- if (!prt)
- return -EINVAL;
-
- entry = kmalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL);
+ entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL);
if (!entry)
return -ENOMEM;
- memset(entry, 0, sizeof(struct acpi_prt_entry));
-
entry->id.segment = segment;
entry->id.bus = bus;
entry->id.device = (prt->address >> 16) & 0xFFFF;
entry->id.function = prt->address & 0xFFFF;
entry->pin = prt->pin;
-
/*
* Type 1: Dynamic
* ---------------
@@ -161,11 +154,9 @@ int acpi_pci_irq_add_prt(acpi_handle han
static int first_time = 1;
- pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
+ pathname = (char *)kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
if (!pathname)
return -ENOMEM;
- memset(pathname, 0, ACPI_PATHNAME_MAX);
-
if (first_time) {
acpi_prt.count = 0;
INIT_LIST_HEAD(&acpi_prt.entries);
@@ -198,11 +189,10 @@ int acpi_pci_irq_add_prt(acpi_handle han
return -ENODEV;
}
- prt = kmalloc(buffer.length, GFP_KERNEL);
+ prt = kzalloc(buffer.length, GFP_KERNEL);
if (!prt) {
return -ENOMEM;
}
- memset(prt, 0, buffer.length);
buffer.pointer = prt;
status = acpi_get_irq_routing_table(handle, &buffer);
diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index 7f3e7e7..a67af5d 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -307,11 +307,10 @@ static int acpi_pci_link_set(struct acpi
if (!link || !irq)
return -EINVAL;
- resource = kmalloc(sizeof(*resource) + 1, GFP_ATOMIC);
+ resource = kzalloc(sizeof(*resource) + 1, GFP_ATOMIC);
if (!resource)
return -ENOMEM;
- memset(resource, 0, sizeof(*resource) + 1);
buffer.length = sizeof(*resource) + 1;
buffer.pointer = resource;
@@ -718,10 +717,9 @@ static int acpi_pci_link_add(struct acpi
if (!device)
return -EINVAL;
- link = kmalloc(sizeof(struct acpi_pci_link), GFP_KERNEL);
+ link = kzalloc(sizeof(struct acpi_pci_link), GFP_KERNEL);
if (!link)
return -ENOMEM;
- memset(link, 0, sizeof(struct acpi_pci_link));
link->device = device;
strcpy(acpi_device_name(device), ACPI_PCI_LINK_DEVICE_NAME);
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 0984a1e..6b55f43 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -164,10 +164,9 @@ static int acpi_pci_root_add(struct acpi
if (!device)
return -EINVAL;
- root = kmalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
+ root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
if (!root)
return -ENOMEM;
- memset(root, 0, sizeof(struct acpi_pci_root));
INIT_LIST_HEAD(&root->node);
root->device = device;
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index fec225d..b73d9c3 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -535,11 +535,9 @@ static int acpi_power_add(struct acpi_de
if (!device)
return -EINVAL;
- resource = kmalloc(sizeof(struct acpi_power_resource), GFP_KERNEL);
+ resource = kzalloc(sizeof(struct acpi_power_resource), GFP_KERNEL);
if (!resource)
return -ENOMEM;
- memset(resource, 0, sizeof(struct acpi_power_resource));
-
resource->device = device;
strcpy(resource->name, device->pnp.bus_id);
strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME);
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index b13d644..e3943f4 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -615,11 +615,9 @@ static int acpi_processor_add(struct acp
if (!device)
return -EINVAL;
- pr = kmalloc(sizeof(struct acpi_processor), GFP_KERNEL);
+ pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL);
if (!pr)
return -ENOMEM;
- memset(pr, 0, sizeof(struct acpi_processor));
-
pr->handle = device->handle;
strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS);
diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c
index 62bef0b..3cd77bc 100644
--- a/drivers/acpi/sbs.c
+++ b/drivers/acpi/sbs.c
@@ -1576,13 +1576,11 @@ static int acpi_sbs_add(struct acpi_devi
int id, cnt;
acpi_status status = AE_OK;
- sbs = kmalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
+ sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
if (!sbs) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "kmalloc() failed\n"));
return -ENOMEM;
}
- memset(sbs, 0, sizeof(struct acpi_sbs));
-
cnt = 0;
while (cnt < 10) {
cnt++;
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 5753d06..bdb0353 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -902,13 +902,11 @@ acpi_thermal_write_trip_points(struct fi
int i = 0;
- limit_string = kmalloc(ACPI_THERMAL_MAX_LIMIT_STR_LEN, GFP_KERNEL);
+ limit_string = kzalloc(ACPI_THERMAL_MAX_LIMIT_STR_LEN, GFP_KERNEL);
if (!limit_string)
return -ENOMEM;
- memset(limit_string, 0, ACPI_THERMAL_MAX_LIMIT_STR_LEN);
-
- active = kmalloc(ACPI_THERMAL_MAX_ACTIVE * sizeof(int), GFP_KERNEL);
+ active = kzalloc(ACPI_THERMAL_MAX_ACTIVE * sizeof(int), GFP_KERNEL);
if (!active) {
kfree(limit_string);
return -ENOMEM;
@@ -923,9 +921,6 @@ acpi_thermal_write_trip_points(struct fi
count = -EFAULT;
goto end;
}
-
- limit_string[count] = '\0';
-
num = sscanf(limit_string, "%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d",
&critical, &hot, &passive,
&active[0], &active[1], &active[2], &active[3], &active[4],
@@ -1271,11 +1266,9 @@ static int acpi_thermal_add(struct acpi_
if (!device)
return -EINVAL;
- tz = kmalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
+ tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
if (!tz)
return -ENOMEM;
- memset(tz, 0, sizeof(struct acpi_thermal));
-
tz->device = device;
strcpy(tz->name, device->pnp.bus_id);
strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index d0d84c4..b27d8d0 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -265,8 +265,6 @@ acpi_evaluate_integer(acpi_handle handle
element = kmalloc(sizeof(union acpi_object), irqs_disabled() ?
GFP_ATOMIC: GFP_KERNEL);
if (!element)
return AE_NO_MEMORY;
-
- memset(element, 0, sizeof(union acpi_object));
buffer.length = sizeof(union acpi_object);
buffer.pointer = element;
status = acpi_evaluate_object(handle, pathname, arguments, &buffer);
Om Narasimhan wrote:
> Hi,
> I had submitted this patch sometime earlier. Submitting again after
> fixing a bug in the patch.
> I have not subscribed to linux-acpi. please CC me in replies.
Please add a description here what you do in your patch. Especially if you're
going to fix a bug it would be good if you shortly describe where it was and
how it was wrong, e.g. "foo() was freeing struct bar on error, but nobody
ever cared for the children of bar".
> Signed Off by : Om Narasimhan <[email protected]>
>
> --
>
> drivers/acpi/ac.c | 4 +---
> drivers/acpi/acpi_memhotplug.c | 14 ++++----------
> drivers/acpi/asus_acpi.c | 3 +--
> drivers/acpi/battery.c | 13 +++----------
> drivers/acpi/bus.c | 3 +--
> drivers/acpi/button.c | 4 +---
> drivers/acpi/container.c | 4 +---
> drivers/acpi/ec.c | 20 +++++---------------
> drivers/acpi/fan.c | 3 +--
> drivers/acpi/i2c_ec.c | 8 ++------
> drivers/acpi/osl.c | 2 +-
> drivers/acpi/pci_bind.c | 21 +++++----------------
> drivers/acpi/pci_irq.c | 16 +++-------------
> drivers/acpi/pci_link.c | 6 ++----
> drivers/acpi/pci_root.c | 3 +--
> drivers/acpi/power.c | 4 +---
> drivers/acpi/processor_core.c | 4 +---
> drivers/acpi/sbs.c | 4 +---
> drivers/acpi/thermal.c | 13 +++----------
> drivers/acpi/utils.c | 2 --
> 20 files changed, 38 insertions(+), 113 deletions(-)
>
> diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
> index 11abc7b..0d05d36 100644
> --- a/drivers/acpi/ac.c
> +++ b/drivers/acpi/ac.c
> @@ -221,11 +221,9 @@ static int acpi_ac_add(struct acpi_devic
> if (!device)
> return -EINVAL;
>
> - ac = kmalloc(sizeof(struct acpi_ac), GFP_KERNEL);
> + ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
> if (!ac)
> return -ENOMEM;
> - memset(ac, 0, sizeof(struct acpi_ac));
> -
> ac->device = device;
> strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
> strcpy(acpi_device_class(device), ACPI_AC_CLASS);
> diff --git a/drivers/acpi/acpi_memhotplug.c
> b/drivers/acpi/acpi_memhotplug.c index 1dda370..4b1a77d 100644
> --- a/drivers/acpi/acpi_memhotplug.c
> +++ b/drivers/acpi/acpi_memhotplug.c
> @@ -292,7 +292,6 @@ static int acpi_memory_disable_device(st
> int result;
> struct acpi_memory_info *info, *n;
>
> -
> /*
> * Ask the VM to offline this memory range.
> * Note: Assume that this function returns zero on success
Depends on the maintainer, but usually it is preferred to do whitespace
cleanups in their own patch. Now I have to dig through >600 lines of patch to
find the bug you fixed. I would have split this one into 3 seperate pieces:
whitespace, k[mz]alloc and the bug fix. This depends on the whishes of the
maintainer, but usually this makes tracking of changes much easier as the
first two can later be ignored more or less if someones trying to nail down a
change in behaviour to a specific patch.
> @@ -418,14 +412,14 @@ static int acpi_memory_device_add(struct
> static int acpi_memory_device_remove(struct acpi_device *device, int type)
> {
> struct acpi_memory_device *mem_device = NULL;
> -
> + struct acpi_memory_info *info, *n;
>
> if (!device || !acpi_driver_data(device))
> return -EINVAL;
> -
> mem_device = (struct acpi_memory_device *)acpi_driver_data(device);
> + list_for_each_entry_safe(info, n, &mem_device->res_list, list)
> + kfree(info);
> kfree(mem_device);
> -
> return 0;
> }
This has nothing to do with your patch, but isn't this check here a bit
superfluous? Also the check in acpi_memory_device_add() to check for device?
These functions should never be called if device is NULL. If it is this is a
bug and it's better to BUG() or just oops here instead of hiding this bug.
Also acpi_memory_device_remove() should never be called if
acpi_memory_device_add() fails. But if this succeeded
acpi_driver_data(device) will always be valid. If it is deleted later by
anyone else this is also a bug and shouldn't be "ignored" silently. Opinions?
> @@ -277,15 +274,12 @@ int acpi_pci_unbind(struct acpi_device *
> char *pathname = NULL;
> struct acpi_buffer buffer = { 0, NULL };
>
> -
> if (!device || !device->parent)
> return -EINVAL;
>
> - pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
> + pathname = (char *)kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
> if (!pathname)
> return -ENOMEM;
> - memset(pathname, 0, ACPI_PATHNAME_MAX);
> -
> buffer.length = ACPI_PATHNAME_MAX;
> buffer.pointer = pathname;
> acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
This btw. is an example where I would also do a whitespace change in a "real"
patch. It doesn't matter here as this area is touched anyway. Not 100%
correct, but who is? :)
> @@ -332,11 +326,9 @@ acpi_pci_bind_root(struct acpi_device *d
> struct acpi_buffer buffer = { 0, NULL };
>
>
> - pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
> + pathname = (char *)kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
> if (!pathname)
> return -ENOMEM;
> - memset(pathname, 0, ACPI_PATHNAME_MAX);
> -
> buffer.length = ACPI_PATHNAME_MAX;
> buffer.pointer = pathname;
>
Kill that cast. kzalloc() returns void* which is assignement compatible with
any pointer.
> diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
> index feda034..b64c50a 100644
> --- a/drivers/acpi/pci_irq.c
> +++ b/drivers/acpi/pci_irq.c
> @@ -85,21 +85,14 @@ acpi_pci_irq_add_entry(acpi_handle handl
> {
> struct acpi_prt_entry *entry = NULL;
>
> -
> - if (!prt)
> - return -EINVAL;
> -
> - entry = kmalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL);
> + entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL);
> if (!entry)
> return -ENOMEM;
> - memset(entry, 0, sizeof(struct acpi_prt_entry));
> -
> entry->id.segment = segment;
> entry->id.bus = bus;
> entry->id.device = (prt->address >> 16) & 0xFFFF;
> entry->id.function = prt->address & 0xFFFF;
> entry->pin = prt->pin;
> -
> /*
> * Type 1: Dynamic
> * ---------------
You are changing the way how this code works here as you removed the check for
prt. Another good example why to split up this patch as this might sometime
really byte someone (haven't checked the code).
> diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
> index 5753d06..bdb0353 100644
> --- a/drivers/acpi/thermal.c
> +++ b/drivers/acpi/thermal.c
> @@ -902,13 +902,11 @@ acpi_thermal_write_trip_points(struct fi
> int i = 0;
>
>
> - limit_string = kmalloc(ACPI_THERMAL_MAX_LIMIT_STR_LEN, GFP_KERNEL);
> + limit_string = kzalloc(ACPI_THERMAL_MAX_LIMIT_STR_LEN, GFP_KERNEL);
> if (!limit_string)
> return -ENOMEM;
>
> - memset(limit_string, 0, ACPI_THERMAL_MAX_LIMIT_STR_LEN);
> -
> - active = kmalloc(ACPI_THERMAL_MAX_ACTIVE * sizeof(int), GFP_KERNEL);
> + active = kzalloc(ACPI_THERMAL_MAX_ACTIVE * sizeof(int), GFP_KERNEL);
> if (!active) {
> kfree(limit_string);
> return -ENOMEM;
*looking in the file*
Eeks, what's that?
if (!tz || (count > ACPI_THERMAL_MAX_LIMIT_STR_LEN - 1)) {
What about
if (!tz || (count >= ACPI_THERMAL_MAX_LIMIT_STR_LEN)) {
Eike