linux-kernel - [tip: irq/core] PCI/MSI: Correct misleading comments

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Date:   Tue, 10 Aug 2021 09:07:44 -0000
From:   "tip-bot2 for Thomas Gleixner" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>, stable@...r.kernel.org,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: irq/core] PCI/MSI: Correct misleading comments

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     689e6b5351573c38ccf92a0dd8b3e2c2241e4aff
Gitweb:        https://git.kernel.org/tip/689e6b5351573c38ccf92a0dd8b3e2c2241e4aff
Author:        Thomas Gleixner <tglx@...utronix.de>
AuthorDate:    Thu, 29 Jul 2021 23:51:45 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Tue, 10 Aug 2021 10:59:20 +02:00

PCI/MSI: Correct misleading comments

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@...utronix.de>
Tested-by: Marc Zyngier <maz@...nel.org>
Reviewed-by: Marc Zyngier <maz@...nel.org>
Cc: stable@...r.kernel.org
Link: https://lore.kernel.org/r/20210729222542.621609423@linutronix.de

---
 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 e27ac6b..b3f5807 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -961,7 +961,6 @@ 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 */
@@ -1047,10 +1046,8 @@ 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);