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authorTomas Winkler <tomas.winkler@intel.com>2013-07-30 15:11:51 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-08-13 02:46:06 +0400
commitff96066e3171acdea356b331163495957cb833d0 (patch)
tree1fcab6ddb535679d1e178ea4fbe921bf7df87821 /drivers/misc
parent3d04dd2f960aa01a09593576f4df56a052ef32a7 (diff)
downloadlinux-ff96066e3171acdea356b331163495957cb833d0.tar.xz
mei: me: fix hardware reset flow
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 Cc: Shuah Khan <shuah.kh@samsung.com> Cc: Konstantin Khlebnikov <khlebnikov@openvz.org> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/mei/hw-me.c9
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;
}