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net: hns: Fix for variable may be used uninitialized warnings 

When !CONFIG_REGMAP hns throws compiler warnings since
dsaf_read_syscon ignores the return result from regmap_read,
which allows val to be uninitialized.

Fixes: 86897c960b ("net: hns: add syscon operation for dsaf")
Reported-by: Jason Gunthorpe <jgg@ziepe.ca>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Huazhong Tan 2018-01-18 10:37:34 +08:00 committed by David S. Miller
parent 3f1dcc6a56
commit 5e89cfac2e
2 changed files with 37 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
View File

@ -44,12 +44,17 @@ static void dsaf_write_sub(struct dsaf_device *dsaf_dev, u32 reg, u32 val)
static u32 dsaf_read_sub(struct dsaf_device *dsaf_dev, u32 reg)
{
u32 ret;
u32 ret = 0;
int err;
if (dsaf_dev->sub_ctrl)
ret = dsaf_read_syscon(dsaf_dev->sub_ctrl, reg);
else
if (dsaf_dev->sub_ctrl) {
err = dsaf_read_syscon(dsaf_dev->sub_ctrl, reg, &ret);
if (err)
dev_err(dsaf_dev->dev, "dsaf_read_syscon error %d!\n",
err);
} else {
ret = dsaf_read_reg(dsaf_dev->sc_base, reg);
}
return ret;
}
@ -188,18 +193,23 @@ static void cpld_led_reset_acpi(struct hns_mac_cb *mac_cb)
static int cpld_set_led_id(struct hns_mac_cb *mac_cb,
enum hnae_led_state status)
{
u32 val = 0;
int ret;
if (!mac_cb->cpld_ctrl)
return 0;
switch (status) {
case HNAE_LED_ACTIVE:
mac_cb->cpld_led_value =
dsaf_read_syscon(mac_cb->cpld_ctrl,
mac_cb->cpld_ctrl_reg);
dsaf_set_bit(mac_cb->cpld_led_value, DSAF_LED_ANCHOR_B,
CPLD_LED_ON_VALUE);
ret = dsaf_read_syscon(mac_cb->cpld_ctrl, mac_cb->cpld_ctrl_reg,
&val);
if (ret)
return ret;
dsaf_set_bit(val, DSAF_LED_ANCHOR_B, CPLD_LED_ON_VALUE);
dsaf_write_syscon(mac_cb->cpld_ctrl, mac_cb->cpld_ctrl_reg,
mac_cb->cpld_led_value);
val);
mac_cb->cpld_led_value = val;
break;
case HNAE_LED_INACTIVE:
dsaf_set_bit(mac_cb->cpld_led_value, DSAF_LED_ANCHOR_B,
@ -560,12 +570,19 @@ static phy_interface_t hns_mac_get_phy_if_acpi(struct hns_mac_cb *mac_cb)
int hns_mac_get_sfp_prsnt(struct hns_mac_cb *mac_cb, int *sfp_prsnt)
{
u32 val = 0;
int ret;
if (!mac_cb->cpld_ctrl)
return -ENODEV;
*sfp_prsnt = !dsaf_read_syscon(mac_cb->cpld_ctrl, mac_cb->cpld_ctrl_reg
+ MAC_SFP_PORT_OFFSET);
ret = dsaf_read_syscon(mac_cb->cpld_ctrl,
mac_cb->cpld_ctrl_reg + MAC_SFP_PORT_OFFSET,
&val);
if (ret)
return ret;
*sfp_prsnt = !val;
return 0;
}
@ -615,7 +632,7 @@ static int hns_mac_config_sds_loopback(struct hns_mac_cb *mac_cb, bool en)
#define RX_CSR(lane, reg) ((0x4080 + (reg) * 0x0002 + (lane) * 0x0200) * 2)
u64 reg_offset = RX_CSR(lane_id[mac_cb->mac_id], 0);
int sfp_prsnt;
int sfp_prsnt = 0;
int ret = hns_mac_get_sfp_prsnt(mac_cb, &sfp_prsnt);
if (!mac_cb->phy_dev) {
@ -627,7 +644,7 @@ static int hns_mac_config_sds_loopback(struct hns_mac_cb *mac_cb, bool en)
}
if (mac_cb->serdes_ctrl) {
u32 origin;
u32 origin = 0;
if (!AE_IS_VER1(mac_cb->dsaf_dev->dsaf_ver)) {
#define HILINK_ACCESS_SEL_CFG 0x40008
@ -644,7 +661,10 @@ static int hns_mac_config_sds_loopback(struct hns_mac_cb *mac_cb, bool en)
HILINK_ACCESS_SEL_CFG, 3);
}
origin = dsaf_read_syscon(mac_cb->serdes_ctrl, reg_offset);
ret = dsaf_read_syscon(mac_cb->serdes_ctrl, reg_offset,
&origin);
if (ret)
return ret;
dsaf_set_field(origin, 1ull << 10, 10, en);
dsaf_write_syscon(mac_cb->serdes_ctrl, reg_offset, origin);

7
drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h
View File

@ -1034,12 +1034,9 @@ static inline void dsaf_write_syscon(struct regmap *base, u32 reg, u32 value)
regmap_write(base, reg, value);
}
static inline u32 dsaf_read_syscon(struct regmap *base, u32 reg)
static inline int dsaf_read_syscon(struct regmap *base, u32 reg, u32 *val)
{
unsigned int val;
regmap_read(base, reg, &val);
return val;
return regmap_read(base, reg, val);
}
#define dsaf_read_dev(a, reg) \