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USB: cxacru: return an empty value for modulation if there is no connection

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When there is no connection, return an empty string
instead of "0" for the connection modulation.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Simon Arlott 2009-11-21 15:03:23 +00:00 committed by Greg Kroah-Hartman
parent 4e0fa90d1d
commit 1bfbd283cd
2 changed files with 3 additions and 2 deletions
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1
Documentation/networking/cxacru.txt
View File

@ -61,6 +61,7 @@ several sysfs attribute files for retrieving device statistics:
* mac_address
* modulation
"" (when not connected)
"ANSI T1.413"
"ITU-T G.992.1 (G.DMT)"
"ITU-T G.992.2 (G.LITE)"

4
drivers/usb/atm/cxacru.c
View File

@ -267,12 +267,12 @@ static ssize_t cxacru_sysfs_showattr_LINE(u32 value, char *buf)
static ssize_t cxacru_sysfs_showattr_MODU(u32 value, char *buf)
{
static char *str[] = {
NULL,
"",
"ANSI T1.413",
"ITU-T G.992.1 (G.DMT)",
"ITU-T G.992.2 (G.LITE)"
};
if (unlikely(value >= ARRAY_SIZE(str) || str[value] == NULL))
if (unlikely(value >= ARRAY_SIZE(str)))
return snprintf(buf, PAGE_SIZE, "%u\n", value);
return snprintf(buf, PAGE_SIZE, "%s\n", str[value]);
}