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[PATCH] I2O: fix and workaround for Motorola/Freescale controller

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- 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>
This commit is contained in:
Markus Lidel
2006-02-03 03:04:29 -08:00
committed by Linus Torvalds
parent 15d8ec7d08
commit 8b3e09e199
3 changed files with 25 additions and 2 deletions
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6
include/linux/i2o.h
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@@ -1115,9 +1115,11 @@ static inline struct i2o_message *i2o_msg_get(struct i2o_controller *c)
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;