Merge branch 'smsc95xx-deadlock'

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Lukas Wunner says:

====================
Deadlock no more in LAN95xx

Second attempt at fixing a runtime resume deadlock in the LAN95xx USB driver:

In short, the driver isn't using the "nopm" register accessors in portions
of its runtime resume path, causing a deadlock.  I'm fixing that by
auto-detecting whether nopm accessors shall be used, instead of
having to explicitly call them wherever it's necessary.
As a byproduct, code size shrinks significantly (see diffstat below).

Back in April I submitted a first attempt which was rejected by Alan Stern:
https://lore.kernel.org/all/6710d8c18ff54139cdc538763ba544187c5a0cee.1651041411.git.lukas@wunner.de/

That approach only detected whether a PM callback is running concurrently,
not whether the access is performed by the PM callback.  I've come up with
a different approach which should resolve the objection (see patch [1/3]).
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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David S. Miller 2022-07-04 10:39:25 +01:00

parent 39bfb3c12d 03b3df43ce

commit 5ee4bba272

1 changed files with 86 additions and 116 deletions

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drivers/net/usb/smsc95xx.c

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