From: H Hartley Sweeten Date: Thu, 24 Jul 2014 17:14:29 +0000 (-0700) Subject: staging: comedi: ni_tio: remove unnecessary ni_gpct_variant BUG() cases X-Git-Tag: firefly_0821_release~176^2~3491^2~266 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=856031614ef3e848f5c60b5c098d365e200d0d20;p=firefly-linux-kernel-4.4.55.git staging: comedi: ni_tio: remove unnecessary ni_gpct_variant BUG() cases The enum ni_gpct_variant is used to handle hardware variations in the gpct timers handled by this driver. This enum is defined as: enum ni_gpct_variant { ni_gpct_variant_e_series, ni_gpct_variant_m_series, ni_gpct_variant_660x }; For all the switch statements where all three enum values are handled, remove the unreachable BUG(). Move the default case so it is handled the same as ni_gpct_variant_e_series. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers/ni_tio.c b/drivers/staging/comedi/drivers/ni_tio.c index 49ffb508de00..c876273a80f4 100644 --- a/drivers/staging/comedi/drivers/ni_tio.c +++ b/drivers/staging/comedi/drivers/ni_tio.c @@ -58,16 +58,13 @@ Gi_Alternate_Sync_Bit(enum ni_gpct_variant variant) { switch (variant) { case ni_gpct_variant_e_series: + default: return 0; case ni_gpct_variant_m_series: return Gi_M_Series_Alternate_Sync_Bit; case ni_gpct_variant_660x: return Gi_660x_Alternate_Sync_Bit; - default: - BUG(); - break; } - return 0; } static inline enum Gi_Counting_Mode_Reg_Bits @@ -75,16 +72,13 @@ Gi_Prescale_X2_Bit(enum ni_gpct_variant variant) { switch (variant) { case ni_gpct_variant_e_series: + default: return 0; case ni_gpct_variant_m_series: return Gi_M_Series_Prescale_X2_Bit; case ni_gpct_variant_660x: return Gi_660x_Prescale_X2_Bit; - default: - BUG(); - break; } - return 0; } static inline enum Gi_Counting_Mode_Reg_Bits @@ -92,16 +86,13 @@ Gi_Prescale_X8_Bit(enum ni_gpct_variant variant) { switch (variant) { case ni_gpct_variant_e_series: + default: return 0; case ni_gpct_variant_m_series: return Gi_M_Series_Prescale_X8_Bit; case ni_gpct_variant_660x: return Gi_660x_Prescale_X8_Bit; - default: - BUG(); - break; } - return 0; } static inline enum Gi_Counting_Mode_Reg_Bits @@ -109,16 +100,13 @@ Gi_HW_Arm_Select_Mask(enum ni_gpct_variant variant) { switch (variant) { case ni_gpct_variant_e_series: + default: return 0; case ni_gpct_variant_m_series: return Gi_M_Series_HW_Arm_Select_Mask; case ni_gpct_variant_660x: return Gi_660x_HW_Arm_Select_Mask; - default: - BUG(); - break; } - return 0; } /* clock sources for ni_660x boards, get bits with Gi_Source_Select_Bits() */ @@ -304,15 +292,12 @@ ni_tio_second_gate_registers_present(const struct ni_gpct_device *counter_dev) { switch (counter_dev->variant) { case ni_gpct_variant_e_series: + default: return 0; case ni_gpct_variant_m_series: case ni_gpct_variant_660x: return 1; - default: - BUG(); - break; } - return 0; } static void ni_tio_reset_count_and_disarm(struct ni_gpct *counter) @@ -704,12 +689,10 @@ static int ni_tio_set_clock_src(struct ni_gpct *counter, break; case ni_gpct_variant_e_series: case ni_gpct_variant_m_series: + default: input_select_bits |= ni_m_series_source_select_bits(clock_source); break; - default: - BUG(); - break; } if (clock_source & NI_GPCT_INVERT_CLOCK_SRC_BIT) input_select_bits |= Gi_Source_Polarity_Bit; @@ -891,14 +874,11 @@ static unsigned ni_tio_generic_clock_src_select(const struct ni_gpct *counter) switch (counter->counter_dev->variant) { case ni_gpct_variant_e_series: case ni_gpct_variant_m_series: + default: return ni_m_series_clock_src_select(counter); case ni_gpct_variant_660x: return ni_660x_clock_src_select(counter); - default: - BUG(); - break; } - return 0; } static uint64_t ni_tio_clock_period_ps(const struct ni_gpct *counter, @@ -1174,12 +1154,10 @@ int ni_tio_set_gate_src(struct ni_gpct *counter, unsigned gate_index, switch (counter_dev->variant) { case ni_gpct_variant_e_series: case ni_gpct_variant_m_series: + default: return ni_m_series_set_first_gate(counter, gate_source); case ni_gpct_variant_660x: return ni_660x_set_first_gate(counter, gate_source); - default: - BUG(); - break; } break; case 1: @@ -1415,6 +1393,7 @@ static int ni_tio_get_gate_src(struct ni_gpct *counter, unsigned gate_index, switch (counter_dev->variant) { case ni_gpct_variant_e_series: case ni_gpct_variant_m_series: + default: *gate_source = ni_m_series_first_gate_to_generic_gate_source (gate_select_bits); @@ -1424,9 +1403,6 @@ static int ni_tio_get_gate_src(struct ni_gpct *counter, unsigned gate_index, ni_660x_first_gate_to_generic_gate_source (gate_select_bits); break; - default: - BUG(); - break; } if (mode_bits & Gi_Gate_Polarity_Bit) *gate_source |= CR_INVERT; @@ -1448,6 +1424,7 @@ static int ni_tio_get_gate_src(struct ni_gpct *counter, unsigned gate_index, switch (counter_dev->variant) { case ni_gpct_variant_e_series: case ni_gpct_variant_m_series: + default: *gate_source = ni_m_series_second_gate_to_generic_gate_source (gate_select_bits); @@ -1457,9 +1434,6 @@ static int ni_tio_get_gate_src(struct ni_gpct *counter, unsigned gate_index, ni_660x_second_gate_to_generic_gate_source (gate_select_bits); break; - default: - BUG(); - break; } if (counter_dev->regs[second_gate_reg] & Gi_Second_Gate_Polarity_Bit) {