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ACPI: clean up video.c boundary checks and types 

proc.c and video.c are a bit sloppy around types and style,
confusing gcc for a new feature that'll be in 2.6.33 and will
cause a warning on the current code.

This patch changes

if  (foo + 1 > sizeof bar)

into

if (foo >= sizeof(bar))

which is more kernel-style.

it also changes a variable in proc.c to unsigned; it gets assigned
a value from an unsigned type, and is then only compared for > not
for negative, so using unsigned is just outright the right type

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Arjan van de Ven 2009-10-01 15:48:40 -07:00 committed by Len Brown
parent 012abeea66
commit 52a2b11caf
2 changed files with 5 additions and 5 deletions
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2
drivers/acpi/proc.c
View File

@ -393,7 +393,7 @@ acpi_system_write_wakeup_device(struct file *file,
struct list_head *node, *next;
char strbuf[5];
char str[5] = "";
int len = count;
unsigned int len = count;
struct acpi_device *found_dev = NULL;
if (len > 4)

8
drivers/acpi/video.c
View File

@ -1223,7 +1223,7 @@ acpi_video_device_write_state(struct file *file,
u32 state = 0;
if (!dev || count + 1 > sizeof str)
if (!dev || count >= sizeof(str))
return -EINVAL;
if (copy_from_user(str, buffer, count))
@ -1280,7 +1280,7 @@ acpi_video_device_write_brightness(struct file *file,
int i;
if (!dev || !dev->brightness || count + 1 > sizeof str)
if (!dev || !dev->brightness || count >= sizeof(str))
return -EINVAL;
if (copy_from_user(str, buffer, count))
@ -1562,7 +1562,7 @@ acpi_video_bus_write_POST(struct file *file,
unsigned long long opt, options;
if (!video || count + 1 > sizeof str)
if (!video || count >= sizeof(str))
return -EINVAL;
status = acpi_video_bus_POST_options(video, &options);
@ -1602,7 +1602,7 @@ acpi_video_bus_write_DOS(struct file *file,
unsigned long opt;
if (!video || count + 1 > sizeof str)
if (!video || count >= sizeof(str))
return -EINVAL;
if (copy_from_user(str, buffer, count))