[L] [PATCH 3/3] thunderbolt: Fix a backport error for display flickering issue

[Kai-Heng Feng]

From: Mario Limonciello <mario.limonciello at amd.com>

BugLink: https://bugs.launchpad.net/bugs/2034491

A mistake was made when backporting commit 583893a66d73 ("thunderbolt: Fix
Thunderbolt 3 display flickering issue on 2nd hot plug onwards") in missing
the `if` block.  Add it back in.

Reported-by: Joakim.Tjernlund at infinera.com
Closes: https://lore.kernel.org/stable/28b5d0accce90bedf2f75d65290c5a1302225f0f.camel@infinera.com/
Fixes: 06614ca4f18e ("thunderbolt: Fix Thunderbolt 3 display flickering issue on 2nd hot plug onwards")
Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
(cherry picked from commit ae0188f9c2a88a2f9e96e5a0ced48adc84982287 linux-6.1.y)
Signed-off-by: Kai-Heng Feng <kai.heng.feng at canonical.com>
---
 drivers/thunderbolt/tmu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/thunderbolt/tmu.c b/drivers/thunderbolt/tmu.c
index d9544600b386..49146f97bb16 100644
--- a/drivers/thunderbolt/tmu.c
+++ b/drivers/thunderbolt/tmu.c
@@ -416,6 +416,7 @@ int tb_switch_tmu_disable(struct tb_switch *sw)
 		 * mode.
 		 */
 		ret = tb_switch_tmu_rate_write(sw, TB_SWITCH_TMU_RATE_OFF);
+		if (ret)
 			return ret;
 
 		tb_port_tmu_time_sync_disable(up);
-- 
2.34.1