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PCI: epf-mhi: Simulate async read/write using iATU

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Even though iATU only supports synchronous read/write, the MHI stack may
call async read/write callbacks without knowing the limitations of the
controller driver. So in order to maintain compatibility, let's simulate
async read/write operation with iATU by invoking the completion callback
after memcpy.

Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
This commit is contained in:
Manivannan Sadhasivam 2023-11-27 15:48:54 +05:30
parent 8b786ed8fb
commit 5424be958b
1 changed files with 6 additions and 0 deletions
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6
drivers/pci/endpoint/functions/pci-epf-mhi.c
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@ -234,6 +234,9 @@ static int pci_epf_mhi_iatu_read(struct mhi_ep_cntrl *mhi_cntrl,
mutex_unlock(&epf_mhi->lock);
if (buf_info->cb)
buf_info->cb(buf_info);
return 0;
}
@ -262,6 +265,9 @@ static int pci_epf_mhi_iatu_write(struct mhi_ep_cntrl *mhi_cntrl,
mutex_unlock(&epf_mhi->lock);
if (buf_info->cb)
buf_info->cb(buf_info);
return 0;
}