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drm/i915: POSTING_READs are simply flushes and so irrelevant to tracing

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As we use POSTING_READ to flush the write to the register before
proceeding, we do not care what the return value is and similar we do
not care for the read to be recorded whilst tracing register
read/writes.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson
2010-11-08 21:07:24 +00:00
parent db5e4172a0
commit 374c479bef
2 changed files with 7 additions and 5 deletions
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4
drivers/gpu/drm/i915/intel_i2c.c
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@@ -126,7 +126,7 @@ static void set_clock(void *data, int state_high)
GPIO_CLOCK_VAL_MASK;
I915_WRITE_NOTRACE(gpio->reg, reserved | clock_bits);
POSTING_READ_NOTRACE(gpio->reg);
POSTING_READ(gpio->reg);
}
static void set_data(void *data, int state_high)
@@ -143,7 +143,7 @@ static void set_data(void *data, int state_high)
GPIO_DATA_VAL_MASK;
I915_WRITE_NOTRACE(gpio->reg, reserved | data_bits);
POSTING_READ_NOTRACE(gpio->reg);
POSTING_READ(gpio->reg);
}
static struct i2c_adapter *