PCI: epf-mhi: Enable MHI async read/write support

Now that both eDMA and iATU are prepared to support async transfer, let's
enable MHI async read/write by supplying the relevant callbacks.

In the absence of eDMA, iATU will be used for both sync and async
operations.

Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

diff --git a/drivers/pci/endpoint/functions/pci-epf-mhi.c b/drivers/pci/endpoint/functions/pci-epf-mhi.c
index 596fd205a3145251138de3c0500f9d3957e35fff..472bc489b754b8e303d3d798d286b3c8b2b0a0ea 100644 (file)
--- a/drivers/pci/endpoint/functions/pci-epf-mhi.c
+++ b/drivers/pci/endpoint/functions/pci-epf-mhi.c
@@ -766,12 +766,13 @@ static int pci_epf_mhi_link_up(struct pci_epf *epf)
        mhi_cntrl->raise_irq = pci_epf_mhi_raise_irq;
        mhi_cntrl->alloc_map = pci_epf_mhi_alloc_map;
        mhi_cntrl->unmap_free = pci_epf_mhi_unmap_free;
+       mhi_cntrl->read_sync = mhi_cntrl->read_async = pci_epf_mhi_iatu_read;
+       mhi_cntrl->write_sync = mhi_cntrl->write_async = pci_epf_mhi_iatu_write;
        if (info->flags & MHI_EPF_USE_DMA) {
                mhi_cntrl->read_sync = pci_epf_mhi_edma_read;
                mhi_cntrl->write_sync = pci_epf_mhi_edma_write;
-       } else {
-               mhi_cntrl->read_sync = pci_epf_mhi_iatu_read;
-               mhi_cntrl->write_sync = pci_epf_mhi_iatu_write;
+               mhi_cntrl->read_async = pci_epf_mhi_edma_read_async;
+               mhi_cntrl->write_async = pci_epf_mhi_edma_write_async;
        }
 
        /* Register the MHI EP controller */