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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        Marc Zyngier <maz@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [PATCH 4.14 23/64] PCI/MSI: Correct misleading comments
Date:   Tue, 24 Aug 2021 13:04:16 -0400
Message-Id: <20210824170457.710623-24-sashal@kernel.org>
In-Reply-To: <20210824170457.710623-1-sashal@kernel.org>
References: <20210824170457.710623-1-sashal@kernel.org>
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From: Thomas Gleixner <tglx@linutronix.de>

commit 689e6b5351573c38ccf92a0dd8b3e2c2241e4aff upstream.

The comments about preserving the cached state in pci_msi[x]_shutdown() are
misleading as the MSI descriptors are freed right after those functions
return. So there is nothing to restore. Preparatory change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210729222542.621609423@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/pci/msi.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index c69cd0dff301..93dd4c69cc46 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -896,7 +896,6 @@ static void pci_msi_shutdown(struct pci_dev *dev)
 
 	/* Return the device with MSI unmasked as initial states */
 	mask = msi_mask(desc->msi_attrib.multi_cap);
-	/* Keep cached state to be restored */
 	__pci_msi_desc_mask_irq(desc, mask, 0);
 
 	/* Restore dev->irq to its default pin-assertion irq */
@@ -982,10 +981,8 @@ static void pci_msix_shutdown(struct pci_dev *dev)
 	}
 
 	/* Return the device with MSI-X masked as initial states */
-	for_each_pci_msi_entry(entry, dev) {
-		/* Keep cached states to be restored */
+	for_each_pci_msi_entry(entry, dev)
 		__pci_msix_desc_mask_irq(entry, 1);
-	}
 
 	pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_ENABLE, 0);
 	pci_intx_for_msi(dev, 1);
-- 
2.30.2