On Tue, 7 Jun 2016, Taylor R Campbell wrote:
Date: Tue, 7 Jun 2016 18:28:11 +0800 (PHT)
From: Paul Goyette <p...@whooppee.com>
Can anyone suggest a reliable way to ensure that a device-driver module
can be _really_ safely detached?
General approach:
1. Prevent new references (e.g., devsw_detach).
2. Wait for existing references to drain (or roll back with
devsw_attach if you don't want to wait, and fail with EBUSY).
3. Unload.
Yes, of course. Thanks, I think this will work.
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| Paul Goyette | PGP Key fingerprint: | E-mail addresses: |
| (Retired) | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd.org |
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