Re: linux-next: manual merge of the char-misc tree with Linus' tree

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Greg KH <greg@xxxxxxxxx> writes:

> On Fri, Aug 27, 2021 at 11:28:52PM +0530, Manivannan Sadhasivam wrote:
>> Hi Greg,
>> 
>> On Fri, Aug 27, 2021 at 03:12:02PM +0200, Greg KH wrote:
>> > On Fri, Aug 27, 2021 at 04:49:04PM +1000, Stephen Rothwell wrote:
>> > > Hi all,
>> > > 
>> > > Today's linux-next merge of the char-misc tree got conflicts in:
>> > > 
>> > >   drivers/bus/mhi/core/main.c
>> > >   net/qrtr/mhi.c
>> > > 
>> > > between commit:
>> > > 
>> > >   9ebc2758d0bb ("Revert "net: really fix the build..."")
>> > > 
>> > > from the origin tree and commit:
>> > > 
>> > >   0092a1e3f763 ("bus: mhi: Add inbound buffers allocation flag")
>> > > 
>> > > from the char-misc tree.
>> > > 
>> > > I fixed it up (the commit in Linus' tree is basically a revert of the
>> > > char-misc tree, so I effectively reverted the latter) 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.
>> > 
>> > Hm, what should I do in my tree here?
>> > 
>> > Kalle, what commit should I make in the char-misc tree now to handle
>> > this issue, and make the merge with Linus's tree "simple"?  Or any other
>> > ideas?
>> > 
>> 
>> For making the merge simpler, I'd suggest we revert below commit in char-misc:
>> 
>> 0092a1e3f763 ("bus: mhi: Add inbound buffers allocation flag")
>
> Reverting that works for me, I've done that in my tree and that allows
> it to be merged cleanly with Linus's tree.

Unfortunately this now breaks the build in char-misc-next (commit
0dc3ad3f859d):

net/qrtr/mhi.c: In function 'qcom_mhi_qrtr_probe':
net/qrtr/mhi.c:105:48: error: 'MHI_CH_INBOUND_ALLOC_BUFS' undeclared (first use in this function)
  105 |         rc = mhi_prepare_for_transfer(mhi_dev, MHI_CH_INBOUND_ALLOC_BUFS);
      |                                                ^~~~~~~~~~~~~~~~~~~~~~~~~
net/qrtr/mhi.c:105:48: note: each undeclared identifier is reported only once for each function it appears in
net/qrtr/mhi.c:105:14: error: too many arguments to function 'mhi_prepare_for_transfer'
  105 |         rc = mhi_prepare_for_transfer(mhi_dev, MHI_CH_INBOUND_ALLOC_BUFS);
      |              ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from net/qrtr/mhi.c:6:
./include/linux/mhi.h:725:5: note: declared here
  725 | int mhi_prepare_for_transfer(struct mhi_device *mhi_dev);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~

To see this error make sure CONFIG_QRTR and CONFIG_QRTR_MHI are enabled.

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