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| author | Lv Zheng <lv.zheng@intel.com> | 2014-07-30 12:21:07 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-07-31 00:50:23 +0200 |
| commit | 3589b8b8af6bdc3aafe520d76a73b77d965006b6 (patch) | |
| tree | a62376b1c3225aa5ef39e22fce0bef558d59c7ad /drivers/acpi | |
| parent | 83118b0de3a84c4728822abf6ce60bf6c8d1dbce (diff) | |
| download | op-kernel-dev-3589b8b8af6bdc3aafe520d76a73b77d965006b6.zip op-kernel-dev-3589b8b8af6bdc3aafe520d76a73b77d965006b6.tar.gz | |
ACPICA: Utilities: Fix local printf issue.
The bug can be reproduced by using a format that do not have the width.prec
specified after a format that have the width.prec specified. The second
formatted output will be wrong. The root cause is acpi_ut_vsnprintf()
doesn't reset the specifiers to the default values.
This patch fixes this issue. BZ 1094. Reported by Yizhe Wang, fixed by
Lv Zheng.
Since acpi_ut_vprintf() is only enabled for specific OSPM now, this patch
doesn't affect Linux kernel.
Link: https://bugs.acpica.org/show_bug.cgi?id=1094
Reported-and-tested-by: Yizhe Wang <yizhe.wang@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpica/utprint.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/utprint.c b/drivers/acpi/acpica/utprint.c index 080e22a..0ce3f5a 100644 --- a/drivers/acpi/acpica/utprint.c +++ b/drivers/acpi/acpica/utprint.c @@ -401,6 +401,7 @@ acpi_ut_vsnprintf(char *string, /* Process width */ + width = -1; if (ACPI_IS_DIGIT(*format)) { format = acpi_ut_scan_number(format, &number); width = (s32) number; @@ -415,6 +416,7 @@ acpi_ut_vsnprintf(char *string, /* Process precision */ + precision = -1; if (*format == '.') { ++format; if (ACPI_IS_DIGIT(*format)) { @@ -431,6 +433,7 @@ acpi_ut_vsnprintf(char *string, /* Process qualifier */ + qualifier = -1; if (*format == 'h' || *format == 'l' || *format == 'L') { qualifier = *format; ++format; |
