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igc: Reinstate IGC_REMOVED logic and implement it properly

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backport from 7c1ddcee53

Signed-off-by: Jim Ma <majinjing3@gmail.com>
This commit is contained in:
Jim Ma 2022-10-27 02:08:23 +08:00
parent e52503cd8f
commit 58a6b64178
2 changed files with 7 additions and 1 deletions
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3
igc_main.c
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@ -4900,6 +4900,9 @@ u32 igc_rd32(struct igc_hw *hw, u32 reg)
u8 __iomem *hw_addr = READ_ONCE(hw->hw_addr);
u32 value = 0;
if (IGC_REMOVED(hw_addr))
return ~value;
value = readl(&hw_addr[reg]);
/* reads should not return all F's */

5
igc_regs.h
View File

@ -253,7 +253,8 @@ u32 igc_rd32(struct igc_hw *hw, u32 reg);
#define wr32(reg, val) \
do { \
u8 __iomem *hw_addr = READ_ONCE((hw)->hw_addr); \
writel((val), &hw_addr[(reg)]); \
if (!IGC_REMOVED(hw_addr)) \
writel((val), &hw_addr[(reg)]); \
} while (0)
#define rd32(reg) (igc_rd32(hw, reg))
@ -265,4 +266,6 @@ do { \
#define array_rd32(reg, offset) (igc_rd32(hw, (reg) + ((offset) << 2)))
#define IGC_REMOVED(h) unlikely(!(h))
#endif