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vsprintf: add %pR support for IRQ and DMA resources 

Print addresses (IO port numbers and memory addresses) in hex, but print
others (IRQs and DMA channels) in decimal.  Only print the end if it's
different from the start.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Bjorn Helgaas 2009-10-06 15:33:34 -06:00 committed by Jesse Barnes
parent 2840537228
commit c91d3376e5
1 changed files with 21 additions and 10 deletions
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29
lib/vsprintf.c
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@ -604,26 +604,37 @@ static char *resource_string(char *buf, char *end, struct resource *res,
#ifndef MEM_RSRC_PRINTK_SIZE
#define MEM_RSRC_PRINTK_SIZE 10
#endif
struct printf_spec num_spec = {
struct printf_spec hex_spec = {
.base = 16,
.precision = -1,
.flags = SPECIAL | SMALL | ZEROPAD,
};
/* room for the actual numbers, the two "0x", -, [, ] and the final zero */
char sym[4*sizeof(resource_size_t) + 8];
struct printf_spec dec_spec = {
.base = 10,
.precision = -1,
.flags = 0,
};
/* room for two actual numbers (decimal or hex), the two "0x", -, [, ]
* and the final zero */
char sym[2*3*sizeof(resource_size_t) + 8];
char *p = sym, *pend = sym + sizeof(sym);
int size = -1;
int size = -1, addr = 0;
if (res->flags & IORESOURCE_IO)
if (res->flags & IORESOURCE_IO) {
size = IO_RSRC_PRINTK_SIZE;
else if (res->flags & IORESOURCE_MEM)
addr = 1;
} else if (res->flags & IORESOURCE_MEM) {
size = MEM_RSRC_PRINTK_SIZE;
addr = 1;
}
*p++ = '[';
num_spec.field_width = size;
p = number(p, pend, res->start, num_spec);
hex_spec.field_width = size;
p = number(p, pend, res->start, addr ? hex_spec : dec_spec);
if (res->start != res->end) {
*p++ = '-';
p = number(p, pend, res->end, num_spec);
p = number(p, pend, res->end, addr ? hex_spec : dec_spec);
}
*p++ = ']';
*p = 0;