[PATCH] I2O: fix and workaround for Motorola/Freescale controller
- This controller violates the I2O spec for the I/O registers. The patch
contains a workaround which moves the registers to the proper location.
(originally author: Matthew Starzewski)
- If a message frame is beyond the mapped address range a error is
returned.
Signed-off-by: Markus Lidel <Markus.Lidel@shadowconnect.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/linux/i2o.h b/include/linux/i2o.h
index 9ba8067..5a9d8c5 100644
--- a/include/linux/i2o.h
+++ b/include/linux/i2o.h
@@ -1115,9 +1115,11 @@
return ERR_PTR(-ENOMEM);
mmsg->mfa = readl(c->in_port);
- if (mmsg->mfa == I2O_QUEUE_EMPTY) {
+ if (unlikely(mmsg->mfa >= c->in_queue.len)) {
mempool_free(mmsg, c->in_msg.mempool);
- return ERR_PTR(-EBUSY);
+ if(mmsg->mfa == I2O_QUEUE_EMPTY)
+ return ERR_PTR(-EBUSY);
+ return ERR_PTR(-EFAULT);
}
return &mmsg->msg;