staging: comedi: ni_tio: export and fix ni_tio_set_bits()

Move the inline function from the header and export it instead.

Fix the checkpatch.pl issue:
WARNING: Prefer 'unsigned int' to bare use of 'unsigned'

The 'unsigned' vars can safely be changed to 'unsigned int'.

This allows moving ni_tio_set_bits_transient() into the driver and
making it static.

Fix the checkpatch.pl issue:
CHECK: Avoid crashing the kernel - try using WARN_ON & recovery code
       rather than BUG() or BUG_ON()

The BUG_ON() is overkill. All the drivers that call this function pass
'register_index' values that are valid. Just check the 'register_index'
before updating the software copy and writing the register.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/ni_tio.c b/drivers/staging/comedi/drivers/ni_tio.c
index abbdad5..5343fce 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_tio.c
+++ b/drivers/staging/comedi/drivers/ni_tio.c
@@ -228,6 +228,43 @@ static uint64_t ni_tio_clock_period_ps(const struct ni_gpct *counter,
        return clock_period_ps;
 }
 
+static void ni_tio_set_bits_transient(struct ni_gpct *counter,
+                                     enum ni_gpct_register reg,
+                                     unsigned int mask, unsigned int value,
+                                     unsigned int transient)
+{
+       struct ni_gpct_device *counter_dev = counter->counter_dev;
+       unsigned long flags;
+
+       if (reg < NITIO_NUM_REGS) {
+               spin_lock_irqsave(&counter_dev->regs_lock, flags);
+               counter_dev->regs[reg] &= ~mask;
+               counter_dev->regs[reg] |= (value & mask);
+               write_register(counter, counter_dev->regs[reg] | transient,
+                              reg);
+               mmiowb();
+               spin_unlock_irqrestore(&counter_dev->regs_lock, flags);
+       }
+}
+
+/**
+ * ni_tio_set_bits() - Safely write a counter register.
+ * @counter: struct ni_gpct counter.
+ * @reg: the register to write.
+ * @mask: the bits to change.
+ * @value: the new bits value.
+ *
+ * Used to write to, and update the software copy, a register whose bits may
+ * be twiddled in interrupt context, or whose software copy may be read in
+ * interrupt context.
+ */
+void ni_tio_set_bits(struct ni_gpct *counter, enum ni_gpct_register reg,
+                    unsigned int mask, unsigned int value)
+{
+       ni_tio_set_bits_transient(counter, reg, mask, value, 0x0);
+}
+EXPORT_SYMBOL_GPL(ni_tio_set_bits);
+
 /**
  * ni_tio_get_soft_copy() - Safely read the software copy of a counter register.
  * @counter: struct ni_gpct counter.

diff --git a/drivers/staging/comedi/drivers/ni_tio_internal.h b/drivers/staging/comedi/drivers/ni_tio_internal.h
index 8c90276..c8ad66a 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_tio_internal.h
+++ b/drivers/staging/comedi/drivers/ni_tio_internal.h
@@ -191,39 +191,8 @@ static inline int ni_tio_counting_mode_registers_present(const struct
        return 0;
 }
 
-static inline void ni_tio_set_bits_transient(struct ni_gpct *counter,
-                                            enum ni_gpct_register
-                                            register_index, unsigned bit_mask,
-                                            unsigned bit_values,
-                                            unsigned transient_bit_values)
-{
-       struct ni_gpct_device *counter_dev = counter->counter_dev;
-       unsigned long flags;
-
-       BUG_ON(register_index >= NITIO_NUM_REGS);
-       spin_lock_irqsave(&counter_dev->regs_lock, flags);
-       counter_dev->regs[register_index] &= ~bit_mask;
-       counter_dev->regs[register_index] |= (bit_values & bit_mask);
-       write_register(counter,
-                      counter_dev->regs[register_index] | transient_bit_values,
-                      register_index);
-       mmiowb();
-       spin_unlock_irqrestore(&counter_dev->regs_lock, flags);
-}
-
-/*
- * ni_tio_set_bits( ) is for safely writing to registers whose bits may be
- * twiddled in interrupt context, or whose software copy may be read in
- * interrupt context.
- */
-static inline void ni_tio_set_bits(struct ni_gpct *counter,
-                                  enum ni_gpct_register register_index,
-                                  unsigned bit_mask, unsigned bit_values)
-{
-       ni_tio_set_bits_transient(counter, register_index, bit_mask, bit_values,
-                                 0x0);
-}
-
+void ni_tio_set_bits(struct ni_gpct *, enum ni_gpct_register reg,
+                    unsigned int mask, unsigned int value);
 unsigned int ni_tio_get_soft_copy(const struct ni_gpct *,
                                  enum ni_gpct_register reg);