pseries/papr-hvpipe: Fix race with interrupt handler

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While executing ->ioctl handler or ->release handler, if an interrupt
fires on the same cpu, then we can enter into a deadlock.

This patch fixes both these handlers to take spin_lock_irq{save|restore}
versions of the lock to prevent this deadlock.

Cc: stable@vger.kernel.org
Fixes: 814ef095f1 ("powerpc/pseries: Add papr-hvpipe char driver for HVPIPE interfaces")
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/e4ed435c44fc191f2eb23c7907ba6f72f193e6aa.1777606826.git.ritesh.list@gmail.com

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Ritesh Harjani (IBM) 2026-05-01 09:41:40 +05:30 • committed by Madhavan Srinivasan

parent 0342545a29

commit 7a4f0846ee

1 changed files with 11 additions and 9 deletions

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arch/powerpc/platforms/pseries/papr-hvpipe.c

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