linux-kernel - [PATCH] fsl/qe: ucc: copy and paste bug in ucc_get_tdm_sync

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Message-ID: <20180604115842.7c4vzge3igjbnblt@kili.mountain>
Date:   Mon, 4 Jun 2018 14:58:42 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Qiang Zhao <qiang.zhao@....com>
Cc:     Li Yang <leoyang.li@....com>, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH] fsl/qe: ucc: copy and paste bug in ucc_get_tdm_sync_shift()

There is a copy and paste bug so we accidentally use the RX_ shift when
we're in TX_ mode.

Fixes: bb8b2062aff3 ("fsl/qe: setup clock source for TDM mode")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
Static analysis work.  Not tested.  This affects the success path, so
we should probably test it.

diff --git a/drivers/soc/fsl/qe/ucc.c b/drivers/soc/fsl/qe/ucc.c
index c646d8713861..681f7d4b7724 100644
--- a/drivers/soc/fsl/qe/ucc.c
+++ b/drivers/soc/fsl/qe/ucc.c
@@ -626,7 +626,7 @@ static u32 ucc_get_tdm_sync_shift(enum comm_dir mode, u32 tdm_num)
 {
 	u32 shift;
 
-	shift = (mode == COMM_DIR_RX) ? RX_SYNC_SHIFT_BASE : RX_SYNC_SHIFT_BASE;
+	shift = (mode == COMM_DIR_RX) ? RX_SYNC_SHIFT_BASE : TX_SYNC_SHIFT_BASE;
 	shift -= tdm_num * 2;
 
 	return shift;