mei: pxp: recover from recv fail under memory pressure

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Under memory pressure recv fails due to kmalloc failure,
and if drivers(pxp) retry send/receive, send blocks
indefinitely.
Send without recv leaves the channel in a bad state.

Retry send attempt after small timeout and reset the channel if
the retry failed on kmalloc failure too.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Alan Previn <alan.previn.teres.alexis@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20231011110157.247552-3-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Alexander Usyskin 2023-10-11 14:01:55 +03:00 • committed by Greg Kroah-Hartman

parent cf439721f6

commit ee5cb39348

1 changed files with 24 additions and 1 deletions

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drivers/misc/mei/pxp/mei_pxp.c

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