Commit ef124960 authored Dec 17, 2012 by Jason Gunthorpe Committed by Linus Torvalds Dec 17, 2012

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>

parent 2fa72c8f

lib/vsprintf.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -1485,6 +1485,9 @@ int vsnprintf(char buf, size_t size, const char fmt, va_list args)
		num = va_arg(args, long);
		break;
		case FORMAT_TYPE_SIZE_T:
		if (spec.flags & SIGN)
		num = va_arg(args, ssize_t);
		else
		num = va_arg(args, size_t);
		break;
		case FORMAT_TYPE_PTRDIFF: