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| author | Tomas Winkler <tomas.winkler@intel.com> | 2013-07-30 14:11:51 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-09-14 07:06:45 -0700 |
| commit | a091ec1987ef9e73d8cb970fe885af1483e6e4c7 (patch) | |
| tree | 318606a13c4f97036f6bbd5c589da8d1fb72d625 | |
| parent | a8f55b8e314fdc26deb92a1108ebfd413cae9dde (diff) | |
| download | lwn-a091ec1987ef9e73d8cb970fe885af1483e6e4c7.tar.gz lwn-a091ec1987ef9e73d8cb970fe885af1483e6e4c7.zip | |
mei: me: fix hardware reset flow
commit ff96066e3171acdea356b331163495957cb833d0 upstream.
Both H_IS and H_IE needs to be set to receive H_RDY
interrupt
1. Assert H_IS to clear the interrupts during hw reset
and use mei_me_reg_write instead of mei_hcsr_set as the later
strips down the H_IS
2. fix interrupt disablement embarrassing typo
hcsr |= ~H_IE -> hcsr &= ~H_IE;
this will remove the unwanted interrupt on power down
3. remove useless debug print outs
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Cc: Shuah Khan <shuah.kh@samsung.com>
Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/misc/mei/hw-me.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index b22c7e247225..3412adcdaeb0 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -176,21 +176,18 @@ static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable) struct mei_me_hw *hw = to_me_hw(dev); u32 hcsr = mei_hcsr_read(hw); - dev_dbg(&dev->pdev->dev, "before reset HCSR = 0x%08x.\n", hcsr); - - hcsr |= (H_RST | H_IG); + hcsr |= H_RST | H_IG | H_IS; if (intr_enable) hcsr |= H_IE; else - hcsr |= ~H_IE; + hcsr &= ~H_IE; - mei_hcsr_set(hw, hcsr); + mei_me_reg_write(hw, H_CSR, hcsr); if (dev->dev_state == MEI_DEV_POWER_DOWN) mei_me_hw_reset_release(dev); - dev_dbg(&dev->pdev->dev, "current HCSR = 0x%08x.\n", mei_hcsr_read(hw)); return 0; } |