diff options
| -rw-r--r-- | drivers/macintosh/via-cuda.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/macintosh/via-cuda.c b/drivers/macintosh/via-cuda.c index 64a04af248a1..1cf1467cf6e5 100644 --- a/drivers/macintosh/via-cuda.c +++ b/drivers/macintosh/via-cuda.c @@ -470,6 +470,8 @@ cuda_poll(void) } EXPORT_SYMBOL(cuda_poll); +#define ARRAY_FULL(a, p) ((p) - (a) == ARRAY_SIZE(a)) + static irqreturn_t cuda_interrupt(int irq, void *arg) { @@ -558,7 +560,11 @@ cuda_interrupt(int irq, void *arg) break; case reading: - *reply_ptr++ = in_8(&via[SR]); + if (reading_reply ? ARRAY_FULL(current_req->reply, reply_ptr) + : ARRAY_FULL(cuda_rbuf, reply_ptr)) + (void)in_8(&via[SR]); + else + *reply_ptr++ = in_8(&via[SR]); if (!TREQ_asserted(status)) { /* that's all folks */ negate_TIP_and_TACK(); |