soc: mediatek: cmdq: remove OR opertaion from err return

Debugging gets harder if we OR two error return values.
Return each error on it's own instead
Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
[mb: rephrase commit message]
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

drivers/soc/mediatek/mtk-cmdq-helper.c

@@ -149,13 +149,16 @@ int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys,
 			u16 offset, u32 value, u32 mask)
 {
 	u32 offset_mask = offset;
-	int err = 0;
+	int err;
 
 	if (mask != 0xffffffff) {
 		err = cmdq_pkt_append_command(pkt, CMDQ_CODE_MASK, 0, ~mask);
+		if (err < 0)
+			return err;
+
 		offset_mask |= CMDQ_WRITE_ENABLE_MASK;
 	}
-	err |= cmdq_pkt_write(pkt, subsys, offset_mask, value);
+	err = cmdq_pkt_write(pkt, subsys, offset_mask, value);
 
 	return err;
 }
@@ -197,9 +200,11 @@ static int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
 
 	/* insert EOC and generate IRQ for each command iteration */
 	err = cmdq_pkt_append_command(pkt, CMDQ_CODE_EOC, 0, CMDQ_EOC_IRQ_EN);
+	if (err < 0)
+		return err;
 
 	/* JUMP to end */
-	err |= cmdq_pkt_append_command(pkt, CMDQ_CODE_JUMP, 0, CMDQ_JUMP_PASS);
+	err = cmdq_pkt_append_command(pkt, CMDQ_CODE_JUMP, 0, CMDQ_JUMP_PASS);
 
 	return err;
 }