thunderbolt: Fix a backport error for display flickering issue

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@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@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/thunderbolt/tmu.c b/drivers/thunderbolt/tmu.c
index d9544600b386778e7a7402b815be565753bde327..49146f97bb16e7cd19ba516ca46affcfc1b17eca 100644 (file)
--- 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);