linux-kernel - [PATCH v2] PCI/MSI: Avoid torn updates to MSI pairs

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Date:   Sat, 25 Jan 2020 10:32:46 -0800
From:   Jacob Pan <jacob.jun.pan@...ux.intel.com>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Evan Green <evgreen@...omium.org>
Subject: [PATCH v2] PCI/MSI: Avoid torn updates to MSI pairs

It seems we could avoid force_retrigger once IR is turned on. I have tried
this patch with IR turned on, still seeing force_retrigger=1 for MSIs w/o
masking.