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-rw-r--r--drivers/net/b44.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/net/b44.c b/drivers/net/b44.c
index 1ec217433b4c..474a4e3438db 100644
--- a/drivers/net/b44.c
+++ b/drivers/net/b44.c
@@ -908,8 +908,9 @@ static irqreturn_t b44_interrupt(int irq, void *dev_id)
istat = br32(bp, B44_ISTAT);
imask = br32(bp, B44_IMASK);
- /* ??? What the fuck is the purpose of the interrupt mask
- * ??? register if we have to mask it out by hand anyways?
+ /* The interrupt mask register controls which interrupt bits
+ * will actually raise an interrupt to the CPU when set by hw/firmware,
+ * but doesn't mask off the bits.
*/
istat &= imask;
if (istat) {