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mei: revamp mei reset state machine

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1. MEI_DEV_RESETTING device state spans only hardware reset flow
while starting dev state is saved into a local variable for further
reference, this let us to reduce big if statements in case we
are trying to avoid nested resets

2. During initializations if the reset ended in MEI_DEV_DISABLED device
state we bail out with -ENODEV

3. Remove redundant interrupts_enabled parameter as this
 can be deduced from the starting dev_state

4. mei_reset propagates error code to the caller

5. Add mei_restart function to wrap the pci resume

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler
2014-01-12 00:36:09 +02:00
committed by Greg Kroah-Hartman
parent db50d2f65b
commit 33ec082631
6 changed files with 151 additions and 112 deletions
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2
drivers/misc/mei/hbm.c
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@@ -763,7 +763,7 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
return -EPROTO;
}
dev->dev_state = MEI_DEV_DISABLED;
dev->dev_state = MEI_DEV_POWER_DOWN;
dev_info(&dev->pdev->dev, "hbm: stop response: resetting.\n");
/* force the reset */
return -EPROTO;