[ar71xx] put in an implicit read-after-write to flush things out.

Note: I may need to revisit this for mips74k.
2016-12-29 17:31:07 +00:00 · 2016-12-29 17:31:07 +00:00 · ccfb1ab87c
commit ccfb1ab87c
parent 4938d86764
1 changed files with 4 additions and 1 deletions
--- a/sys/mips/atheros/ar71xxreg.h
+++ b/sys/mips/atheros/ar71xxreg.h
@ -527,7 +527,10 @@ typedef enum {
    *((volatile uint32_t *)MIPS_PHYS_TO_KSEG1((reg)))

 #define ATH_WRITE_REG(reg, val) \
-    *((volatile uint32_t *)MIPS_PHYS_TO_KSEG1((reg))) = (val)
+    do { \
+      *((volatile uint32_t *)MIPS_PHYS_TO_KSEG1((reg))) = (val); \
+      (void) ATH_READ_REG(reg); \
+    } while (0)

 static inline void
 ar71xx_ddr_flush(uint32_t reg)