From 73b2d13607f075ff27abbf75d57320a8b9f82461 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 23 Mar 2016 15:36:43 -0700 Subject: [PATCH] staging: comedi: ni_tio_internal: simplify ni_tio_counting_mode_registers_present() Only the e series gpct variant does not have counting mode registers. Simplfy this function. For aesthetics, return bool instead of int. This fixes the checkpatch.pl issues: CHECK: spaces preferred around that '*' (ctx:ExV) CHECK: Avoid crashing the kernel - try using WARN_ON & recovery code rather than BUG() or BUG_ON() Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/ni_tio.c | 2 +- .../staging/comedi/drivers/ni_tio_internal.h | 18 ++++-------------- 2 files changed, 5 insertions(+), 15 deletions(-) diff --git a/drivers/staging/comedi/drivers/ni_tio.c b/drivers/staging/comedi/drivers/ni_tio.c index 5343fce88ebf..44dea4c4da20 100644 --- a/drivers/staging/comedi/drivers/ni_tio.c +++ b/drivers/staging/comedi/drivers/ni_tio.c @@ -451,7 +451,7 @@ static void ni_tio_set_sync_mode(struct ni_gpct *counter, int force_alt_sync) unsigned mode; uint64_t clock_period_ps; - if (ni_tio_counting_mode_registers_present(counter_dev) == 0) + if (!ni_tio_counting_mode_registers_present(counter_dev)) return; mode = ni_tio_get_soft_copy(counter, counting_mode_reg); diff --git a/drivers/staging/comedi/drivers/ni_tio_internal.h b/drivers/staging/comedi/drivers/ni_tio_internal.h index c8ad66a9237f..1e795fd6f288 100644 --- a/drivers/staging/comedi/drivers/ni_tio_internal.h +++ b/drivers/staging/comedi/drivers/ni_tio_internal.h @@ -174,21 +174,11 @@ static inline unsigned read_register(struct ni_gpct *counter, return counter->counter_dev->read_register(counter, reg); } -static inline int ni_tio_counting_mode_registers_present(const struct - ni_gpct_device - *counter_dev) +static inline bool +ni_tio_counting_mode_registers_present(const struct ni_gpct_device *counter_dev) { - switch (counter_dev->variant) { - case ni_gpct_variant_e_series: - return 0; - case ni_gpct_variant_m_series: - case ni_gpct_variant_660x: - return 1; - default: - BUG(); - break; - } - return 0; + /* m series and 660x variants have counting mode registers */ + return counter_dev->variant != ni_gpct_variant_e_series; } void ni_tio_set_bits(struct ni_gpct *, enum ni_gpct_register reg, -- 2.20.1