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drm/i915: Fix l3 parity user buffer offset 

The buf pointer used during l3_write is just char *, therefore it does
not require the silly any addition of offset.

v2: Also fix i915_l3_read with a suggested logic from Ville

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ben Widawsky 2013-09-12 22:28:29 -07:00 committed by Daniel Vetter
parent 1c3dcd1cf6
commit 33618ea5e0
1 changed files with 6 additions and 6 deletions
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12
drivers/gpu/drm/i915/i915_sysfs.c
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@ -127,6 +127,8 @@ i915_l3_read(struct file *filp, struct kobject *kobj,
if (ret)
return ret;
count = min_t(int, GEN7_L3LOG_SIZE-offset, count);
ret = i915_mutex_lock_interruptible(drm_dev);
if (ret)
return ret;
@ -134,14 +136,14 @@ i915_l3_read(struct file *filp, struct kobject *kobj,
misccpctl = I915_READ(GEN7_MISCCPCTL);
I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
for (i = offset; count >= 4 && i < GEN7_L3LOG_SIZE; i += 4, count -= 4)
*((uint32_t *)(&buf[i])) = I915_READ(GEN7_L3LOG_BASE + i);
for (i = 0; i < count; i += 4)
*((uint32_t *)(&buf[i])) = I915_READ(GEN7_L3LOG_BASE + offset + i);
I915_WRITE(GEN7_MISCCPCTL, misccpctl);
mutex_unlock(&drm_dev->struct_mutex);
return i - offset;
return i;
}
static ssize_t
@ -186,9 +188,7 @@ i915_l3_write(struct file *filp, struct kobject *kobj,
if (temp)
dev_priv->l3_parity.remap_info = temp;
memcpy(dev_priv->l3_parity.remap_info + (offset/4),
buf + (offset/4),
count);
memcpy(dev_priv->l3_parity.remap_info + (offset/4), buf, count);
i915_gem_l3_remap(drm_dev);