Commit 3589b8b8 authored by Lv Zheng's avatar Lv Zheng Committed by Rafael J. Wysocki

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=1094Reported-and-tested-by: default avatarYizhe Wang <yizhe.wang@intel.com>
Signed-off-by: default avatarLv Zheng <lv.zheng@intel.com>
Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 83118b0d
......@@ -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;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment