staging: rtl8723bs: simplify control flow

staging: rtl8723bs: simplify control flow

Checkpatch issues "WARNING: else is not generally useful after a break
or return" for the following code:

while (1) {
	do_join_r = rtw_do_join(padapter);
	if (do_join_r == _SUCCESS) {
		break;
	} else {
		rtw_dec_to_roam(padapter);

		if (rtw_to_roam(padapter) > 0) {
			continue;
		} else {
			rtw_indicate_disconnect(padapter);
			break;
		}
	}
}

We simplify this code in multiple steps. First, we remove do_join_r
variable because it is only used right after it is assigned. Second,
we remove the unnecessary else statement right after break:

while (1) {
	if (rtw_do_join(padapter) == _SUCCESS)
		break;
	rtw_dec_to_roam(padapter);

	if (rtw_to_roam(padapter) > 0) {
		continue;
	} else {
		rtw_indicate_disconnect(padapter);
		break;
	}
}

Next, we move the call to rtw_do_join into the while test because the
while will loop only until the call is successful:

while (rtw_do_join(padapter) != _SUCCESS) {
	rtw_dec_to_roam(padapter);
	if (rtw_to_roam(padapter) > 0) {
		continue;
	} else {
		rtw_indicate_disconnect(padapter);
		break;
	}
}

Finally, looking at the code above, it is clear that the code will
break out of the loop if rtw_to_roam call is <= 0. Hence:

while (rtw_do_join(padapter) != _SUCCESS) {
	rtw_dec_to_roam(padapter);
	if (rtw_to_roam(padapter) <= 0) {
		rtw_indicate_disconnect(padapter);
		break;
	}
}

Signed-off-by: Sevinj Aghayeva <sevinj.aghayeva@gmail.com>
Link: https://lore.kernel.org/r/20220403224207.GA397480@euclid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>