On Wed, Mar 08, 2023 at 06:03:00PM +0900, Damien Le Moal wrote:
> Re-initialize the transfer_complete DMA transfer completion before
> calling tx_submit(), to avoid seeing the DMA transfer complete before
> the completion is initialized, thus potentially losing the completion
> notification.
>
> Fixes: 8353813c88ef ("PCI: endpoint: Enable DMA tests for endpoints with DMA capabilities")
Please also CC stable list for backporting
> Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <mani@xxxxxxxxxx>
Thanks,
Mani
> ---
> drivers/pci/endpoint/functions/pci-epf-test.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
> index 0f9d2ec822ac..d65419735d2e 100644
> --- a/drivers/pci/endpoint/functions/pci-epf-test.c
> +++ b/drivers/pci/endpoint/functions/pci-epf-test.c
> @@ -151,10 +151,10 @@ static int pci_epf_test_data_transfer(struct pci_epf_test *epf_test,
> return -EIO;
> }
>
> + reinit_completion(&epf_test->transfer_complete);
> tx->callback = pci_epf_test_dma_callback;
> tx->callback_param = epf_test;
> cookie = tx->tx_submit(tx);
> - reinit_completion(&epf_test->transfer_complete);
>
> ret = dma_submit_error(cookie);
> if (ret) {
> --
> 2.39.2
>
--
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