linux-kernel - [PATCH] xen/pciback: fix cast to restricted pci_ers_result_t and pci_power

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Message-ID: <20240917233653.61630-1-minhuadotchen@gmail.com>
Date: Wed, 18 Sep 2024 07:36:50 +0800
From: Min-Hua Chen <minhuadotchen@...il.com>
To: Juergen Gross <jgross@...e.com>,
	Stefano Stabellini <sstabellini@...nel.org>,
	Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>
Cc: Min-Hua Chen <minhuadotchen@...il.com>,
	xen-devel@...ts.xenproject.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] xen/pciback: fix cast to restricted pci_ers_result_t and pci_power_t

This patch fix the following sparse warning by applying
__force cast to pci_ers_result_t and pci_power_t.

drivers/xen/xen-pciback/pci_stub.c:760:16: sparse: warning: cast to restricted pci_ers_result_t
drivers/xen/xen-pciback/conf_space_capability.c:125:22: sparse: warning: cast to restricted pci_power_t

No functional changes intended.

Signed-off-by: Min-Hua Chen <minhuadotchen@...il.com>
---
 drivers/xen/xen-pciback/conf_space_capability.c | 2 +-
 drivers/xen/xen-pciback/pci_stub.c              | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/xen/xen-pciback/conf_space_capability.c b/drivers/xen/xen-pciback/conf_space_capability.c
index 1948a9700c8f..cf568e899ee2 100644
--- a/drivers/xen/xen-pciback/conf_space_capability.c
+++ b/drivers/xen/xen-pciback/conf_space_capability.c
@@ -122,7 +122,7 @@ static int pm_ctrl_write(struct pci_dev *dev, int offset, u16 new_value,
 	if (err)
 		goto out;
 
-	new_state = (pci_power_t)(new_value & PCI_PM_CTRL_STATE_MASK);
+	new_state = (__force pci_power_t)(new_value & PCI_PM_CTRL_STATE_MASK);
 
 	new_value &= PM_OK_BITS;
 	if ((old_value & PM_OK_BITS) != new_value) {
diff --git a/drivers/xen/xen-pciback/pci_stub.c b/drivers/xen/xen-pciback/pci_stub.c
index 4faebbb84999..368738312696 100644
--- a/drivers/xen/xen-pciback/pci_stub.c
+++ b/drivers/xen/xen-pciback/pci_stub.c
@@ -757,7 +757,7 @@ static pci_ers_result_t common_process(struct pcistub_device *psdev,
 	}
 	clear_bit(_PCIB_op_pending, (unsigned long *)&pdev->flags);
 
-	res = (pci_ers_result_t)aer_op->err;
+	res = (__force pci_ers_result_t)aer_op->err;
 	return res;
 }
 
-- 
2.43.0