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vsprintf: add %pR support for IRQ and DMA resources

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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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31
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);
*p++ = '-';
p = number(p, pend, res->end, 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, addr ? hex_spec : dec_spec);
}
*p++ = ']';
*p = 0;