In the pci_epf_test_init_dma_chan(), epf_test->dma_chan_rx
is assigned from dma_request_channel() with DMA_DEV_TO_MEM as
filter.dma_mask. However, in the pci_epf_test_data_transfer(),
if the dir is DMA_DEV_TO_MEM, it should use epf->dma_chan_rx,
but it used epf_test->dma_chan_tx. So, fix it. Otherwise,
results of pcitest with enabled DMA will be "NOT OKAY" on eDMA
environment.
Fixes: 8353813c88ef ("PCI: endpoint: Enable DMA tests for endpoints with DMA capabilities")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Reviewed-by: Frank Li <Frank.Li@xxxxxxx>
Tested-by: Kunihiko Hayashi <hayashi.kunihiko@xxxxxxxxxxxxx>
---
Patch history:
v1: https://lore.kernel.org/linux-pci/20230221100949.3530608-1-yoshihiro.shimoda.uh@xxxxxxxxxxx/
v1 resend: https://lore.kernel.org/linux-pci/20230221101706.3530869-1-yoshihiro.shimoda.uh@xxxxxxxxxxx/
v2: https://lore.kernel.org/linux-pci/20230222015327.3585691-1-yoshihiro.shimoda.uh@xxxxxxxxxxx/
v10 [1]: https://lore.kernel.org/linux-pci/20230308082352.491561-3-yoshihiro.shimoda.uh@xxxxxxxxxxx/
v11 [1]: https://lore.kernel.org/linux-pci/20230310123510.675685-3-yoshihiro.shimoda.uh@xxxxxxxxxxx/
v12: This patch.
Changes from v11:
- Add Tested-by (Thanks Hayashi-san!).
[1] Include this patch into R-Car S4 support patch series. However, I need
more time to fix the R-Car patches. So, I send this fix patch independently.
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..172e5ac0bd96 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -112,7 +112,7 @@ static int pci_epf_test_data_transfer(struct pci_epf_test *epf_test,
size_t len, dma_addr_t dma_remote,
enum dma_transfer_direction dir)
{
- struct dma_chan *chan = (dir == DMA_DEV_TO_MEM) ?
+ struct dma_chan *chan = (dir == DMA_MEM_TO_DEV) ?
epf_test->dma_chan_tx : epf_test->dma_chan_rx;
dma_addr_t dma_local = (dir == DMA_MEM_TO_DEV) ? dma_src : dma_dst;
enum dma_ctrl_flags flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
--
2.25.1
