Currently, if DMA MEMCPY test is requested by the host, and if the endpoint DMA controller supports DMA_PRIVATE, the test will fail. This is not correct since there is no check for DMA_MEMCPY capability and the DMA controller can support both DMA_PRIVATE and DMA_MEMCPY.
So fix the check and also reword the error message.
Reported-by: Niklas Cassel cassel@kernel.org Closes: https://lore.kernel.org/linux-pci/Z3QtEihbiKIGogWA@ryzen Fixes: 8353813c88ef ("PCI: endpoint: Enable DMA tests for endpoints with DMA capabilities") Signed-off-by: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org --- drivers/pci/endpoint/functions/pci-epf-test.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c index ffb534a8e50a..b94e205ae10b 100644 --- a/drivers/pci/endpoint/functions/pci-epf-test.c +++ b/drivers/pci/endpoint/functions/pci-epf-test.c @@ -331,8 +331,8 @@ static void pci_epf_test_copy(struct pci_epf_test *epf_test, void *copy_buf = NULL, *buf;
if (reg->flags & FLAG_USE_DMA) { - if (epf_test->dma_private) { - dev_err(dev, "Cannot transfer data using DMA\n"); + if (!dma_has_cap(DMA_MEMCPY, epf_test->dma_chan_tx->device->cap_mask)) { + dev_err(dev, "DMA controller doesn't support MEMCPY\n"); ret = -EINVAL; goto set_status; }