linux-kernel - [PATCH] xen/pciback: remove set but not used variable 'old

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Date:   Wed, 24 Jul 2019 22:08:50 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <boris.ostrovsky@...cle.com>, <jgross@...e.com>,
        <sstabellini@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <xen-devel@...ts.xenproject.org>,
        YueHaibing <yuehaibing@...wei.com>
Subject: [PATCH] xen/pciback: remove set but not used variable 'old_state'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/xen/xen-pciback/conf_space_capability.c: In function pm_ctrl_write:
drivers/xen/xen-pciback/conf_space_capability.c:119:25: warning:
 variable old_state set but not used [-Wunused-but-set-variable]

It is never used so can be removed.

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 drivers/xen/xen-pciback/conf_space_capability.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/xen/xen-pciback/conf_space_capability.c b/drivers/xen/xen-pciback/conf_space_capability.c
index 73427d8..e569413 100644
--- a/drivers/xen/xen-pciback/conf_space_capability.c
+++ b/drivers/xen/xen-pciback/conf_space_capability.c
@@ -116,13 +116,12 @@ static int pm_ctrl_write(struct pci_dev *dev, int offset, u16 new_value,
 {
 	int err;
 	u16 old_value;
-	pci_power_t new_state, old_state;
+	pci_power_t new_state;
 
 	err = pci_read_config_word(dev, offset, &old_value);
 	if (err)
 		goto out;
 
-	old_state = (pci_power_t)(old_value & PCI_PM_CTRL_STATE_MASK);
 	new_state = (pci_power_t)(new_value & PCI_PM_CTRL_STATE_MASK);
 
 	new_value &= PM_OK_BITS;
-- 
2.7.4