[PATCH net-next] net: ethernet: et131x: Remove unused variable 'pm_csr'

From: Zhang Changzhong
Date: Fri Jul 17 2020 - 06:33:39 EST


Gcc report warning as follows:

drivers/net/ethernet/agere/et131x.c:953:6: warning:
variable 'pm_csr' set but not used [-Wunused-but-set-variable]
953 | u32 pm_csr;
| ^~~~~~
drivers/net/ethernet/agere/et131x.c:1002:6:warning:
variable 'pm_csr' set but not used [-Wunused-but-set-variable]
1002 | u32 pm_csr;
| ^~~~~~
drivers/net/ethernet/agere/et131x.c:3446:8: warning:
variable 'pm_csr' set but not used [-Wunused-but-set-variable]
3446 | u32 pm_csr;
| ^~~~~~

After commit 38df6492eb51 ("et131x: Add PCIe gigabit ethernet driver
et131x to drivers/net"), 'pm_csr' is never used in these functions,
so removing it to avoid build warning.

Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Zhang Changzhong <zhangchangzhong@xxxxxxxxxx>
---
drivers/net/ethernet/agere/et131x.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/agere/et131x.c b/drivers/net/ethernet/agere/et131x.c
index 865892c..8806e1e 100644
--- a/drivers/net/ethernet/agere/et131x.c
+++ b/drivers/net/ethernet/agere/et131x.c
@@ -950,7 +950,6 @@ static void et1310_setup_device_for_multicast(struct et131x_adapter *adapter)
u32 hash2 = 0;
u32 hash3 = 0;
u32 hash4 = 0;
- u32 pm_csr;

/* If ET131X_PACKET_TYPE_MULTICAST is specified, then we provision
* the multi-cast LIST. If it is NOT specified, (and "ALL" is not
@@ -984,7 +983,7 @@ static void et1310_setup_device_for_multicast(struct et131x_adapter *adapter)
}

/* Write out the new hash to the device */
- pm_csr = readl(&adapter->regs->global.pm_csr);
+ readl(&adapter->regs->global.pm_csr);
if (!et1310_in_phy_coma(adapter)) {
writel(hash1, &rxmac->multi_hash1);
writel(hash2, &rxmac->multi_hash2);
@@ -999,7 +998,6 @@ static void et1310_setup_device_for_unicast(struct et131x_adapter *adapter)
u32 uni_pf1;
u32 uni_pf2;
u32 uni_pf3;
- u32 pm_csr;

/* Set up unicast packet filter reg 3 to be the first two octets of
* the MAC address for both address
@@ -1025,7 +1023,7 @@ static void et1310_setup_device_for_unicast(struct et131x_adapter *adapter)
(adapter->addr[4] << ET_RX_UNI_PF_ADDR1_5_SHIFT) |
adapter->addr[5];

- pm_csr = readl(&adapter->regs->global.pm_csr);
+ readl(&adapter->regs->global.pm_csr);
if (!et1310_in_phy_coma(adapter)) {
writel(uni_pf1, &rxmac->uni_pf_addr1);
writel(uni_pf2, &rxmac->uni_pf_addr2);
@@ -3443,12 +3441,10 @@ static irqreturn_t et131x_isr(int irq, void *dev_id)
* send a pause packet, otherwise just exit
*/
if (adapter->flow == FLOW_TXONLY || adapter->flow == FLOW_BOTH) {
- u32 pm_csr;
-
/* Tell the device to send a pause packet via the back
* pressure register (bp req and bp xon/xoff)
*/
- pm_csr = readl(&iomem->global.pm_csr);
+ readl(&iomem->global.pm_csr);
if (!et1310_in_phy_coma(adapter))
writel(3, &iomem->txmac.bp_ctrl);
}
--
1.8.3.1