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| author | Jason Gunthorpe <jgunthorpe@obsidianresearch.com> | 2012-12-17 15:59:58 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-17 17:15:13 -0800 |
| commit | ef12496022d5917cfe0b04cf8fd685fc6bc08400 (patch) | |
| tree | 0dde49b464f3d06f1279c6262e2b3d9800893e1d | |
| parent | 2fa72c8fa5d03c4e07894ccb9f0be72e8687a455 (diff) | |
| download | lwn-ef12496022d5917cfe0b04cf8fd685fc6bc08400.tar.gz lwn-ef12496022d5917cfe0b04cf8fd685fc6bc08400.zip | |
lib/vsprintf.c: fix handling of %zd when using ssize_t
Documentation/printk-formats.txt says to use %zd for a ssize_t argument
and some drivers do. Unfortunately this prints a positive number for
negative values eg:
tpm_tis 70030000.tpm_tis: tpm_transmit: tpm_send: error 4294967234
Add a case to va_args a ssize_t type if the interpretation should be
signed.
Tested on PPC32.
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | lib/vsprintf.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 39c99fea7c03..41da0741a663 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -1485,7 +1485,10 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) num = va_arg(args, long); break; case FORMAT_TYPE_SIZE_T: - num = va_arg(args, size_t); + if (spec.flags & SIGN) + num = va_arg(args, ssize_t); + else + num = va_arg(args, size_t); break; case FORMAT_TYPE_PTRDIFF: num = va_arg(args, ptrdiff_t); |