Merge branch 'ipa-fixes'

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Alex Elder says:

====================
net: ipa: prevent shutdown during setup

The setup phase of the IPA driver occurs in one of two ways.
Normally, it is done directly by the main driver probe function.
But some systems (those having a "modem-init" DTS property) don't
start setup until an SMP2P interrupt (sent by the modem) arrives.

Because it isn't performed by the probe function, setup on
"modem-init" systems could be underway at the time a driver
remove (or shutdown) request arrives (or vice-versa).  This
situation can lead to hardware state not being cleaned up
properly.

This series addresses this problem by having the driver remove
function disable the setup interrupt.  A consequence of this is
that setup will complete if it is underway when the remove function
is called.

So now, when removing the driver, setup:
  - will have already completed;
  - is underway, and will complete before proceeding; or
  - will not have begun (and will not occur).
====================

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

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This commit is contained in:

David S. Miller 2021-11-23 12:06:40 +00:00

parent bd08ee2315 8afc7e471a

commit 60ebd6737c

4 changed files with 22 additions and 18 deletions

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6

drivers/net/ipa/ipa_main.c

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6

drivers/net/ipa/ipa_modem.c

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21

drivers/net/ipa/ipa_smp2p.c

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7

drivers/net/ipa/ipa_smp2p.h

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