Re: linux-next: manual merge of the mhi tree with the net-next tree

Manivannan Sadhasivam
2021-07-16T04:04:23Z

On Fri, Jul 16, 2021 at 09:16:22AM +0530, Manivannan Sadhasivam wrote:
> Hi Stephen,
>
> On Fri, Jul 16, 2021 at 01:37:38PM +1000, Stephen Rothwell wrote:
> > Hi all,
> >
> > Today's linux-next merge of the mhi tree got a conflict in:
> >
> > drivers/bus/mhi/pci_generic.c
> >
> > between commit:
> >
> > 5c2c85315948 ("bus: mhi: pci-generic: configurable network interface MRU")
> >
>
> Ah, this one was never submitted to "linux-arm-msm" mailing list nor to
> me. I'm surprised that networking maintainers merged this patch without
> getting an Ack from me as it touches MHI bus :/
>
> > from the net-next tree and commit:
> >
> > 156ffb7fb7eb ("bus: mhi: pci_generic: Apply no-op for wake using sideband wake boolean")
> >
> > from the mhi tree.
> >
> > I fixed it up (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.
> >
>
> This change should've been taken via immutable branch between mhi-next
> and net-next or via mhi tree. Because, we have more changes coming in for
> pci-generic driver in MHI tree.
>
> Dave, since this patch is in your tree, what do you suggest?
>

Btw, I do have a comment about the patch. So it shouldn't be merged as
it is.

Thanks,
Mani

> Thanks,
> Mani
>
> > --
> > Cheers,
> > Stephen Rothwell
> >
> > diff --cc drivers/bus/mhi/pci_generic.c
> > index 19413daa0917,8bc6149249e3..000000000000
> > --- a/drivers/bus/mhi/pci_generic.c
> > +++ b/drivers/bus/mhi/pci_generic.c
> > @@@ -32,7 -32,8 +32,9 @@@
> > * @edl: emergency download mode firmware path (if any)
> > * @bar_num: PCI base address register to use for MHI MMIO register space
> > * @dma_data_width: DMA transfer word size (32 or 64 bits)
> > + * @mru_default: default MRU size for MBIM network packets
> > + * @sideband_wake: Devices using dedicated sideband GPIO for wakeup instead
> > + * of inband wake support (such as sdx24)
> > */
> > struct mhi_pci_dev_info {
> > const struct mhi_controller_config *config;
> > @@@ -41,7 -42,7 +43,8 @@@
> > const char *edl;
> > unsigned int bar_num;
> > unsigned int dma_data_width;
> > + unsigned int mru_default;
> > + bool sideband_wake;
> > };
> >
> > #define MHI_CHANNEL_CONFIG_UL(ch_num, ch_name, el_count, ev_ring) \
> > @@@ -254,7 -256,7 +258,8 @@@ static const struct mhi_pci_dev_info mh
> > .config = &modem_qcom_v1_mhiv_config,
> > .bar_num = MHI_PCI_DEFAULT_BAR_NUM,
> > .dma_data_width = 32,
> > + .mru_default = 32768
> > + .sideband_wake = false,
> > };
> >
> > static const struct mhi_pci_dev_info mhi_qcom_sdx24_info = {
> > @@@ -643,11 -686,13 +689,14 @@@ static int mhi_pci_probe(struct pci_de
> > mhi_cntrl->status_cb = mhi_pci_status_cb;
> > mhi_cntrl->runtime_get = mhi_pci_runtime_get;
> > mhi_cntrl->runtime_put = mhi_pci_runtime_put;
> > - mhi_cntrl->wake_get = mhi_pci_wake_get_nop;
> > - mhi_cntrl->wake_put = mhi_pci_wake_put_nop;
> > - mhi_cntrl->wake_toggle = mhi_pci_wake_toggle_nop;
> > + mhi_cntrl->mru = info->mru_default;
> >
> > + if (info->sideband_wake) {
> > + mhi_cntrl->wake_get = mhi_pci_wake_get_nop;
> > + mhi_cntrl->wake_put = mhi_pci_wake_put_nop;
> > + mhi_cntrl->wake_toggle = mhi_pci_wake_toggle_nop;
> > + }
> > +
> > err = mhi_pci_claim(mhi_cntrl, info->bar_num, DMA_BIT_MASK(info->dma_data_width));
> > if (err)
> > return err;
>
>