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mei: don't use cached value for hcsr in mei_hw_reset

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Open code mei_hw_reset to avoid using cached hcsr.
Using cached hcsr can cause unwanted side effects.

Move mei_hw_restet function to hw-me.c as it is hw dependent

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler
2013-01-08 23:07:27 +02:00
committed by Greg Kroah-Hartman
parent 528c8eb4e7
commit adfba3220b
3 changed files with 36 additions and 28 deletions
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35
drivers/misc/mei/hw-me.c
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@@ -132,6 +132,41 @@ void mei_disable_interrupts(struct mei_device *dev)
mei_hcsr_set(dev);
}
/**
* mei_hw_reset - resets fw via mei csr register.
*
* @dev: the device structure
* @interrupts_enabled: if interrupt should be enabled after reset.
*/
void mei_hw_reset(struct mei_device *dev, bool intr_enable)
{
u32 hcsr = mei_hcsr_read(dev);
dev_dbg(&dev->pdev->dev, "before reset HCSR = 0x%08x.\n", hcsr);
hcsr |= (H_RST | H_IG);
if (intr_enable)
hcsr |= H_IE;
else
hcsr &= ~H_IE;
hcsr &= ~H_IS;
mei_reg_write(dev, H_CSR, hcsr);
hcsr = mei_hcsr_read(dev);
hcsr &= ~H_RST;
hcsr |= H_IG;
hcsr &= ~H_IS;
mei_reg_write(dev, H_CSR, hcsr);
hcsr = mei_hcsr_read(dev);
dev_dbg(&dev->pdev->dev, "current HCSR = 0x%08x.\n", hcsr);
}
/**
* mei_interrupt_quick_handler - The ISR of the MEI device