From: Nam Cao <namcao@linutronix.de>
To: Madhavan Srinivasan <maddy@linux.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
Christophe Leroy <chleroy@kernel.org>,
Nilay Shroff <nilay@linux.ibm.com>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Cc: Nam Cao <namcao@linutronix.de>, stable@vger.kernel.org
Subject: [PATCH] powerpc/pseries: Correct MSI allocation tracking
Date: Mon, 2 Mar 2026 01:39:48 +0100 [thread overview]
Message-ID: <20260302003948.1452016-1-namcao@linutronix.de> (raw)
The per-device MSI allocation calculation in pseries_irq_domain_alloc()
is clearly wrong. It can still happen to work when nr_irqs is 1.
Correct it.
Fixes: c0215e2d72de ("powerpc/pseries: Fix MSI-X allocation failure when quota is exceeded")
Cc: stable@vger.kernel.org
Signed-off-by: Nam Cao <namcao@linutronix.de>
---
arch/powerpc/platforms/pseries/msi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c
index 64ffc6476ad6..8285b9a29fbf 100644
--- a/arch/powerpc/platforms/pseries/msi.c
+++ b/arch/powerpc/platforms/pseries/msi.c
@@ -605,7 +605,7 @@ static int pseries_irq_domain_alloc(struct irq_domain *domain, unsigned int virq
&pseries_msi_irq_chip, pseries_dev);
}
- pseries_dev->msi_used++;
+ pseries_dev->msi_used += nr_irqs;
return 0;
out:
--
2.47.3
next reply other threads:[~2026-03-02 0:40 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-02 0:39 Nam Cao [this message]
2026-03-03 10:13 ` [PATCH] powerpc/pseries: Correct MSI allocation tracking Nilay Shroff
2026-03-03 13:49 ` Mahesh J Salgaonkar
2026-03-11 2:14 ` Madhavan Srinivasan
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