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PCI: endpoint: pci-epf-test: Fix check for DMA MEMCPY test

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[ Upstream commit 235c2b197a8de2887f13990094a3343d2392155b ]

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.

Fix the check and also reword the error message.

Link: https://lore.kernel.org/r/20250116171650.33585-2-manivannan.sadhasivam@linaro.org
Fixes: 8353813c88 ("PCI: endpoint: Enable DMA tests for endpoints with DMA capabilities")
Reported-by: Niklas Cassel <cassel@kernel.org>
Closes: https://lore.kernel.org/linux-pci/Z3QtEihbiKIGogWA@ryzen
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Manivannan Sadhasivam 2025-01-16 22:46:47 +05:30 committed by Greg Kroah-Hartman
parent b5d46ca8bd
commit 22389a1974
1 changed files with 2 additions and 2 deletions
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4
drivers/pci/endpoint/functions/pci-epf-test.c
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@ -373,8 +373,8 @@ static int pci_epf_test_copy(struct pci_epf_test *epf_test)
ktime_get_ts64(&start);
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 err_map_addr;
}