Differential D35081

pbio: Add locking and remove D_NEEDGIANT.
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Authored by jhb on Apr 27 2022, 3:41 PM.

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rG80893ea32be0: pbio: Add locking and remove D_NEEDGIANT.
rG51f481235c29: pbio: Add locking and remove D_NEEDGIANT.

Summary

Use a sx lock to permit uiomove directly into/out of the the per-port
buffers. In addition, the sx lock provides a stronger guarantee that
I think this driver wants which is to single-thread read and write
calls even while paused. Finally, replace tsleep with dummy wait
channels with calls to pause_sig to more clearly communicate the
intent.

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rG FreeBSD src repository

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Event Timeline

jhb requested review of this revision.Apr 27 2022, 3:41 PM

jhb created this revision.

jhb added a parent revision: D35080: pbio: Return BUS_PROBE_DEFAULT from probe instead of 0..

Harbormaster completed remote builds in B45396: Diff 105470.Apr 27 2022, 3:41 PM

This revision was not accepted when it landed; it landed in state Needs Review.May 5 2022, 11:44 PM

Closed by commit rG51f481235c29: pbio: Add locking and remove D_NEEDGIANT. (authored by jhb). · Explain Why

This revision was automatically updated to reflect the committed changes.

jhb added a commit: rG51f481235c29: pbio: Add locking and remove D_NEEDGIANT..

jhb added a commit: rG80893ea32be0: pbio: Add locking and remove D_NEEDGIANT..May 20 2022, 12:21 AM

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sys/

dev/

pbio/

54 lines

Diff 105729

sys/dev/pbio/pbio.c

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