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net: dhcp: make unmodified variable const 

'str' in dhcp_set_string_options is never modified, so make it const.
With this we no longer have to cast away the const returned from getenv.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2015-12-11 19:56:27 +01:00
parent 802d8fdfbe
commit 7065fa32ca
1 changed files with 3 additions and 3 deletions
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6
net/dhcp.c
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@ -204,13 +204,13 @@ static void bootfile_vendorex_handle(struct dhcp_opt *opt, unsigned char *popt,
static int dhcp_set_string_options(struct dhcp_opt *param, u8 *e)
{
int str_len;
char* str = param->data;
const char *str = param->data;
if (!str && param->barebox_var_name && IS_ENABLED(CONFIG_ENVIRONMENT_VARIABLES))
str = (char*)getenv(param->barebox_var_name);
str = getenv(param->barebox_var_name);
if (!str && param->barebox_dhcp_global && IS_ENABLED(CONFIG_GLOBALVAR))
str = (char*)dhcp_get_barebox_global(param->barebox_dhcp_global);
str = dhcp_get_barebox_global(param->barebox_dhcp_global);
if (!str)
return 0;