linux-kernel - linux-next: manual merge of the rdma tree with Linus' tree

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Date:   Mon, 6 Aug 2018 12:01:31 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>
Cc:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: linux-next: manual merge of the rdma tree with Linus' tree

Hi all,

Today's linux-next merge of the rdma tree got a conflict in:

  drivers/infiniband/core/uverbs_main.c

between commit:

  1eb9364ce81d ("IB/uverbs: Fix ordering of ucontext check in ib_uverbs_write")

from Linus' tree and commit:

  a9b66d6453d7 ("IB/uverbs: Do not block disassociate during write()")

from the rdma tree.

I fixed it up (I am not entirely sure this is correct, but see below) and
can carry the fix as necessary. This is now fixed as far as linux-next
is concerned, but any non trivial conflicts should be mentioned to your
upstream maintainer when your tree is submitted for merging.  You may
also want to consider cooperating with the maintainer of the conflicting
tree to minimise any particularly complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc drivers/infiniband/core/uverbs_main.c
index 2094d136513d,6f62146e9738..000000000000
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@@ -748,24 -758,8 +758,18 @@@ static ssize_t ib_uverbs_write(struct f
  		return ret;
  
  	srcu_key = srcu_read_lock(&file->device->disassociate_srcu);
- 	ib_dev = srcu_dereference(file->device->ib_dev,
- 				  &file->device->disassociate_srcu);
- 	if (!ib_dev) {
- 		ret = -EIO;
- 		goto out;
- 	}
  
 +	/*
 +	 * Must be after the ib_dev check, as once the RCU clears ib_dev ==
 +	 * NULL means ucontext == NULL
 +	 */
 +	if (!file->ucontext &&
 +	    (command != IB_USER_VERBS_CMD_GET_CONTEXT || extended)) {
 +		ret = -EINVAL;
 +		goto out;
 +	}
 +
- 	if (!verify_command_mask(ib_dev, command, extended)) {
+ 	if (!verify_command_mask(file, command, extended)) {
  		ret = -EOPNOTSUPP;
  		goto out;
  	}

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