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habanalabs: disable FW events on device removal

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[ Upstream commit 2dc4a6d79168e7e426e8ddf8e7219c9ffd13b2b1 ]

When device is removed, we need to make sure the F/W won't send us
any more events because during the remove process we disable the
interrupts.

Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Oded Gabbay 2021-01-18 21:39:46 +02:00 committed by Greg Kroah-Hartman
parent 90981a2171
commit 4587cb6f27
1 changed files with 9 additions and 0 deletions
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9
drivers/misc/habanalabs/common/device.c
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@ -1425,6 +1425,15 @@ void hl_device_fini(struct hl_device *hdev)
}
}
/* Disable PCI access from device F/W so it won't send us additional
* interrupts. We disable MSI/MSI-X at the halt_engines function and we
* can't have the F/W sending us interrupts after that. We need to
* disable the access here because if the device is marked disable, the
* message won't be send. Also, in case of heartbeat, the device CPU is
* marked as disable so this message won't be sent
*/
hl_fw_send_pci_access_msg(hdev, CPUCP_PACKET_DISABLE_PCI_ACCESS);
/* Mark device as disabled */
hdev->disabled = true;