diff options
| author | Tomas Winkler <tomas.winkler@intel.com> | 2014-01-08 19:19:22 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-09 00:25:41 +0100 |
| commit | 66ae460b13c31a176b41550259683c841a62af3e (patch) | |
| tree | e923cdf7f4cc857bed6a5c74a5ca4c674034a37e /drivers/misc/mei/init.c | |
| parent | mei: do not run reset flow from the interrupt thread (diff) | |
| download | linux-66ae460b13c31a176b41550259683c841a62af3e.tar.xz linux-66ae460b13c31a176b41550259683c841a62af3e.zip | |
mei: use hbm idle state to prevent spurious resets
When reset is caused by hbm protocol mismatch or timeout
we might end up in an endless reset loop and hbm protocol
will never sync
Cc: <stable@vger.kernel.org>
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>
Diffstat (limited to 'drivers/misc/mei/init.c')
| -rw-r--r-- | drivers/misc/mei/init.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index 87c077bae5d8..c47fa273879e 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -129,14 +129,19 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) dev_warn(&dev->pdev->dev, "unexpected reset: dev_state = %s\n", mei_dev_state_str(dev->dev_state)); + /* we're already in reset, cancel the init timer + * if the reset was called due the hbm protocol error + * we need to call it before hw start + * so the hbm watchdog won't kick in + */ + mei_hbm_idle(dev); + ret = mei_hw_reset(dev, interrupts_enabled); if (ret) { dev_err(&dev->pdev->dev, "hw reset failed disabling the device\n"); interrupts_enabled = false; - dev->dev_state = MEI_DEV_DISABLED; } - dev->hbm_state = MEI_HBM_IDLE; if (dev->dev_state != MEI_DEV_INITIALIZING && dev->dev_state != MEI_DEV_POWER_UP) { @@ -160,8 +165,6 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) memset(&dev->wr_ext_msg, 0, sizeof(dev->wr_ext_msg)); } - /* we're already in reset, cancel the init timer */ - dev->init_clients_timer = 0; dev->me_clients_num = 0; dev->rd_msg_hdr = 0; @@ -169,6 +172,7 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) if (!interrupts_enabled) { dev_dbg(&dev->pdev->dev, "intr not enabled end of reset\n"); + dev->dev_state = MEI_DEV_DISABLED; return; } |