linux-kernel - [PATCH] powerpc/pseries: Force 32 bit MSIs when tearing down

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Date:	Mon, 27 May 2013 18:20:27 +0200
From:	Alexander Gordeev <agordeev@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Brian King <brking@...ux.vnet.ibm.com>
Subject: [PATCH] powerpc/pseries: Force 32 bit MSIs when tearing down

This fix just adds a missed call to a new PAPR function
which should have been done with commit e61133d ("powerpc/
pseries: Force 32 bit MSIs for devices that require it")

Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
---
 arch/powerpc/platforms/pseries/msi.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c
index 40c7db3..2b80a68 100644
--- a/arch/powerpc/platforms/pseries/msi.c
+++ b/arch/powerpc/platforms/pseries/msi.c
@@ -90,6 +90,7 @@ static int rtas_change_msi(struct pci_dn *pdn, u32 func, u32 num_irqs)
 static void rtas_disable_msi(struct pci_dev *pdev)
 {
 	struct pci_dn *pdn;
+	int rc;
 
 	pdn = get_pdn(pdev);
 	if (!pdn)
@@ -98,7 +99,12 @@ static void rtas_disable_msi(struct pci_dev *pdev)
 	/*
 	 * disabling MSI with the explicit interface also disables MSI-X
 	 */
-	if (rtas_change_msi(pdn, RTAS_CHANGE_MSI_FN, 0) != 0) {
+	if (pdn->force_32bit_msi)
+		rc = rtas_change_msi(pdn, RTAS_CHANGE_32MSI_FN, 0);
+	else
+		rc = rtas_change_msi(pdn, RTAS_CHANGE_MSI_FN, 0);
+
+	if ((rc != 0) && !pdn->force_32bit_msi) {
 		/* 
 		 * may have failed because explicit interface is not
 		 * present
-- 
1.7.7.6


-- 
Regards,
Alexander Gordeev
agordeev@...hat.com
--
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