sdb driver error when transfer buffer size big than 16M

[ugxmg]

strsep will change value of rxbuf_str

so, the right is below

static long rpmsg_sdb_decode_rxbuf_string(char *rxbuf_str, int *buffer_id, size_t *size)
{
int ret = 0;
char *sub_str;
long bsize;
long bufid;
const char delimiter[1] = {'L'};

//pr_err("%s: rxbuf_str:%s\n", __func__, rxbuf_str);

/* Get first part containing the buffer id */
sub_str = strsep(&rxbuf_str, delimiter);

//pr_err("%s: sub_str:%s\n", __func__, sub_str);

/* Save Buffer id and size: template BxLyyyyyyyy*/
ret = kstrtol(&sub_str[1], 10, &bufid);
if (ret < 0) {
	pr_err("%s: extract of buffer id failed(%d)", __func__, ret);
	goto out;
}

ret = kstrtol(rxbuf_str, 16, &bsize);
if (ret < 0) {
	pr_err("%s: extract of buffer size failed(%d)", __func__, ret);
	goto out;
}

*size = (size_t)bsize;
*buffer_id = (int)bufid;

out:
return ret;
}