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| author |   Mark Rustad <mark.d.rustad@intel.com> | 2014-01-14 18:53:16 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-01-14 18:59:17 -0800 |
| commit | b12babd4d0a83d9bae214e4c056711a279acad26 (patch) | |
| tree | 5752fbfb772d12d3566228566f94aea65a6b1148 /drivers/net/ethernet/intel/ixgbe/ixgbe_common.h | |
| parent | ixgbe: Check register reads for adapter removal (diff) | |
| download | linux-dev-b12babd4d0a83d9bae214e4c056711a279acad26.tar.xz linux-dev-b12babd4d0a83d9bae214e4c056711a279acad26.zip | |
ixgbe: Check for adapter removal on register writes
Prevent writes to an adapter that has been detected as removed
by a previous failing read. This also fixes some include file
ordering confusion that this patch revealed.
Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/intel/ixgbe/ixgbe_common.h')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_common.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h index b6faaacbe7a9..f2e3919750ec 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h @@ -135,7 +135,11 @@ void ixgbe_check_remove(struct ixgbe_hw *hw, u32 reg); static inline void ixgbe_write_reg(struct ixgbe_hw *hw, u32 reg, u32 value) { - writel(value, hw->hw_addr + reg); + u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr); + + if (ixgbe_removed(reg_addr)) + return; + writel(value, reg_addr + reg); } #define IXGBE_WRITE_REG(a, reg, value) ixgbe_write_reg((a), (reg), (value)) @@ -150,7 +154,11 @@ static inline void writeq(u64 val, void __iomem *addr) static inline void ixgbe_write_reg64(struct ixgbe_hw *hw, u32 reg, u64 value) { - writeq(value, hw->hw_addr + reg); + u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr); + + if (ixgbe_removed(reg_addr)) + return; + writeq(value, reg_addr + reg); } #define IXGBE_WRITE_REG64(a, reg, value) ixgbe_write_reg64((a), (reg), (value)) |