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rtw88: pci: use for loop instead of while loop for DBI/MDIO

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Use a for loop to polling DBI/MDIO read/write flags to avoid
infinite loop happens

Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Reviewed-by: Chris Chiu <chiu@endlessm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Yan-Hsuan Chuang 2019-11-18 17:54:30 +08:00 committed by Kalle Valo
parent 83a5a2d76f
commit ff3297f62f
1 changed files with 14 additions and 12 deletions
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24
drivers/net/wireless/realtek/rtw88/pci.c
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@ -1062,7 +1062,7 @@ static void rtw_dbi_write8(struct rtw_dev *rtwdev, u16 addr, u8 data)
u16 write_addr;
u16 remainder = addr & ~(BITS_DBI_WREN | BITS_DBI_ADDR_MASK);
u8 flag;
u8 cnt = RTW_PCI_WR_RETRY_CNT;
u8 cnt;
write_addr = addr & BITS_DBI_ADDR_MASK;
write_addr |= u16_encode_bits(BIT(remainder), BITS_DBI_WREN);
@ -1070,21 +1070,22 @@ static void rtw_dbi_write8(struct rtw_dev *rtwdev, u16 addr, u8 data)
rtw_write16(rtwdev, REG_DBI_FLAG_V1, write_addr);
rtw_write8(rtwdev, REG_DBI_FLAG_V1 + 2, BIT_DBI_WFLAG >> 16);
for (cnt = 0; cnt < RTW_PCI_WR_RETRY_CNT; cnt++) {
flag = rtw_read8(rtwdev, REG_DBI_FLAG_V1 + 2);
while (flag && (cnt != 0)) {
if (flag == 0)
return;
udelay(10);
flag = rtw_read8(rtwdev, REG_DBI_FLAG_V1 + 2);
cnt--;
}
WARN(flag, "DBI write fail\n");
WARN(flag, "failed to write to DBI register, addr=0x%04x\n", addr);
}
static void rtw_mdio_write(struct rtw_dev *rtwdev, u8 addr, u16 data, bool g1)
{
u8 page;
u8 wflag;
u8 cnt = RTW_PCI_WR_RETRY_CNT;
u8 cnt;
rtw_write16(rtwdev, REG_MDIO_V1, data);
@ -1094,15 +1095,16 @@ static void rtw_mdio_write(struct rtw_dev *rtwdev, u8 addr, u16 data, bool g1)
rtw_write8(rtwdev, REG_PCIE_MIX_CFG + 3, page);
rtw_write32_mask(rtwdev, REG_PCIE_MIX_CFG, BIT_MDIO_WFLAG_V1, 1);
wflag = rtw_read32_mask(rtwdev, REG_PCIE_MIX_CFG, BIT_MDIO_WFLAG_V1);
while (wflag && (cnt != 0)) {
udelay(10);
for (cnt = 0; cnt < RTW_PCI_WR_RETRY_CNT; cnt++) {
wflag = rtw_read32_mask(rtwdev, REG_PCIE_MIX_CFG,
BIT_MDIO_WFLAG_V1);
cnt--;
if (wflag == 0)
return;
udelay(10);
}
WARN(wflag, "MDIO write fail\n");
WARN(wflag, "failed to write to MDIO register, addr=0x%02x\n", addr);
}
static void rtw_pci_phy_cfg(struct rtw_dev *rtwdev)