|
@@ -1177,12 +1177,20 @@ void et131x_handle_recv_interrupt(struct et131x_adapter *etdev)
|
|
|
|
|
|
static inline u32 bump_fbr(u32 *fbr, u32 limit)
|
|
|
{
|
|
|
- u32 v = *fbr;
|
|
|
- add_10bit(&v, 1);
|
|
|
- if (v > limit)
|
|
|
- v = (*fbr & ~ET_DMA10_MASK) ^ ET_DMA10_WRAP;
|
|
|
- *fbr = v;
|
|
|
- return v;
|
|
|
+ u32 v = *fbr;
|
|
|
+ v++;
|
|
|
+ /* This works for all cases where limit < 1024. The 1023 case
|
|
|
+ works because 1023++ is 1024 which means the if condition is not
|
|
|
+ taken but the carry of the bit into the wrap bit toggles the wrap
|
|
|
+ value correctly */
|
|
|
+ if ((v & ET_DMA10_MASK) > limit) {
|
|
|
+ v &= ~ET_DMA10_MASK;
|
|
|
+ v ^= ET_DMA10_WRAP;
|
|
|
+ }
|
|
|
+ /* For the 1023 case */
|
|
|
+ v &= (ET_DMA10_MASK|ET_DMA10_WRAP);
|
|
|
+ *fbr = v;
|
|
|
+ return v;
|
|
|
}
|
|
|
|
|
|
/**
|