From a7ed5b3e7dca197de4da6273940a7ca6d1d756a1 Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Thu, 11 Oct 2018 21:05:20 +0200 Subject: [PATCH] staging: comedi: tio: fix multiple missing break in switch bugs Currently, there are multiple missing break statements in two switch code blocks. This makes the execution path to fall all the way down through to the default cases, which makes the function ni_tio_set_gate_src() to always return -EINVAL. Fix this by adding the missing break statements. Also, notice that due to the absence of the break statements, the following pieces of code are unreachable: 1078 if (ret) 1079 return ret; 1080 /* 3. reenable & set mode to starts things back up */ 1081 ni_tio_set_gate_mode(counter, src); 1098 if (ret) 1099 return ret; 1100 /* 3. reenable & set mode to starts things back up */ 1101 ni_tio_set_gate2_mode(counter, src); So, by adding the missing breaks, this patch also fixes the problem above. Addresses-Coverity-ID: 1474165 ("Missing break in switch") Addresses-Coverity-ID: 1474162 ("Structurally dead code") Fixes: 347e244884c3 ("staging: comedi: tio: implement global tio/ctr routing") Signed-off-by: Gustavo A. R. Silva Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/ni_tio.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/staging/comedi/drivers/ni_tio.c b/drivers/staging/comedi/drivers/ni_tio.c index 838614ee64d6..0eb388c0e1f0 100644 --- a/drivers/staging/comedi/drivers/ni_tio.c +++ b/drivers/staging/comedi/drivers/ni_tio.c @@ -1070,8 +1070,10 @@ int ni_tio_set_gate_src(struct ni_gpct *counter, case ni_gpct_variant_e_series: case ni_gpct_variant_m_series: ret = ni_m_set_gate(counter, chan); + break; case ni_gpct_variant_660x: ret = ni_660x_set_gate(counter, chan); + break; default: return -EINVAL; } @@ -1090,8 +1092,10 @@ int ni_tio_set_gate_src(struct ni_gpct *counter, switch (counter_dev->variant) { case ni_gpct_variant_m_series: ret = ni_m_set_gate2(counter, chan); + break; case ni_gpct_variant_660x: ret = ni_660x_set_gate2(counter, chan); + break; default: return -EINVAL; }