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Merge branch 'for-5.18-vsprintf-fourcc-fixup' into for-linus

This commit is contained in:
Petr Mladek 2022-03-21 14:44:49 +01:00
parent b665eae7a7 f74a08fc61
commit 0834c6f03b
1 changed files with 8 additions and 5 deletions
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13
lib/vsprintf.c
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@ -49,6 +49,7 @@
#include <asm/page.h> /* for PAGE_SIZE */
#include <asm/byteorder.h> /* cpu_to_le16 */
#include <asm/unaligned.h>
#include <linux/string_helpers.h>
#include "kstrtox.h"
@ -1788,7 +1789,7 @@ char *fourcc_string(char *buf, char *end, const u32 *fourcc,
char output[sizeof("0123 little-endian (0x01234567)")];
char *p = output;
unsigned int i;
u32 val;
u32 orig, val;
if (fmt[1] != 'c' || fmt[2] != 'c')
return error_string(buf, end, "(%p4?)", spec);
@ -1796,21 +1797,23 @@ char *fourcc_string(char *buf, char *end, const u32 *fourcc,
if (check_pointer(&buf, end, fourcc, spec))
return buf;
val = *fourcc & ~BIT(31);
orig = get_unaligned(fourcc);
val = orig & ~BIT(31);
for (i = 0; i < sizeof(*fourcc); i++) {
for (i = 0; i < sizeof(u32); i++) {
unsigned char c = val >> (i * 8);
/* Print non-control ASCII characters as-is, dot otherwise */
*p++ = isascii(c) && isprint(c) ? c : '.';
}
strcpy(p, *fourcc & BIT(31) ? " big-endian" : " little-endian");
*p++ = ' ';
strcpy(p, orig & BIT(31) ? "big-endian" : "little-endian");
p += strlen(p);
*p++ = ' ';
*p++ = '(';
p = special_hex_number(p, output + sizeof(output) - 2, *fourcc, sizeof(u32));
p = special_hex_number(p, output + sizeof(output) - 2, orig, sizeof(u32));
*p++ = ')';
*p = '\0';