diff options
| author |   Yan-Hsuan Chuang <yhchuang@realtek.com> | 2019-11-18 17:54:30 +0800 |
|---|---|---|
| committer |   Kalle Valo <kvalo@codeaurora.org> | 2019-11-20 09:44:49 +0200 |
| commit | ff3297f62fff6fc90d35051eec48913dbd9cbb18 (patch) | |
| tree | 09c3a4c4a74aae2a8389ec3cf263abd6e9de28eb /drivers/net/wireless | |
| parent | rtw88: pci: use macros to access PCI DBI/MDIO registers (diff) | |
| download | linux-dev-ff3297f62fff6fc90d35051eec48913dbd9cbb18.tar.xz linux-dev-ff3297f62fff6fc90d35051eec48913dbd9cbb18.zip | |
rtw88: pci: use for loop instead of while loop for DBI/MDIO
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>
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/realtek/rtw88/pci.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/drivers/net/wireless/realtek/rtw88/pci.c b/drivers/net/wireless/realtek/rtw88/pci.c index b158ef8ded17..6d1aa6f41e84 100644 --- a/drivers/net/wireless/realtek/rtw88/pci.c +++ b/drivers/net/wireless/realtek/rtw88/pci.c @@ -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); - flag = rtw_read8(rtwdev, REG_DBI_FLAG_V1 + 2); - while (flag && (cnt != 0)) { - udelay(10); + for (cnt = 0; cnt < RTW_PCI_WR_RETRY_CNT; cnt++) { flag = rtw_read8(rtwdev, REG_DBI_FLAG_V1 + 2); - cnt--; + if (flag == 0) + return; + + udelay(10); } - 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) |