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| author | Oded Gabbay <oded.gabbay@gmail.com> | 2019-02-28 11:46:12 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-28 15:04:59 +0300 |
| commit | a28ce422a6d926c11d7e72a83ccaa4f9b06077ea (patch) | |
| tree | 65f08f69e8eec0cf7d5272a87e2e612f975c04ec /drivers/misc/habanalabs/device.c | |
| parent | 27ca384cb7c44b8b16ea43f9aed930664140360e (diff) | |
| download | linux-a28ce422a6d926c11d7e72a83ccaa4f9b06077ea.tar.xz | |
habanalabs: disable CPU access on timeouts
This patch provides a workaround for a bug in the F/W where the response
time for a request from KMD may take more then 100ms. This could cause the
queue between KMD and the F/W to get out of sync.
The WA is to:
1. Increase the timeout of ALL requests to 1s.
2. In case a request isn't answered in time, mark the state as
"cpu_disabled" and prevent sending further requests from KMD to the F/W.
This will eventually lead to a heartbeat failure and hard reset of the
device.
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/habanalabs/device.c')
| -rw-r--r-- | drivers/misc/habanalabs/device.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/misc/habanalabs/device.c b/drivers/misc/habanalabs/device.c index 120d30a13afb..de46aa6ed154 100644 --- a/drivers/misc/habanalabs/device.c +++ b/drivers/misc/habanalabs/device.c @@ -636,6 +636,8 @@ again: /* Finished tear-down, starting to re-initialize */ if (hard_reset) { + hdev->device_cpu_disabled = false; + /* Allocate the kernel context */ hdev->kernel_ctx = kzalloc(sizeof(*hdev->kernel_ctx), GFP_KERNEL); |