The PTDMA driver sets DMA masks in two different places for the same device inconsistently. First call is in pt_pci_probe(), where it uses 48bit mask. The second call is in pt_dmaengine_register(), where it uses a 64bit mask. Using 64bit dma mask causes IO_PAGE_FAULT errors on DMA transfers between main memory and other devices. Without the extra call it works fine. Additionally the second call doesn't check the return value so it can silently fail. Remove the superfluous dma_set_mask() call and only use 48bit mask.
Cc: stable@vger.kernel.org Fixes: b0b4a6b10577 ("dmaengine: ptdma: register PTDMA controller as a DMA resource")
Signed-off-by: Tadeusz Struk tstruk@gigaio.com --- drivers/dma/ptdma/ptdma-dmaengine.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/dma/ptdma/ptdma-dmaengine.c b/drivers/dma/ptdma/ptdma-dmaengine.c index 1aa65e5de0f3..f79240734807 100644 --- a/drivers/dma/ptdma/ptdma-dmaengine.c +++ b/drivers/dma/ptdma/ptdma-dmaengine.c @@ -385,8 +385,6 @@ int pt_dmaengine_register(struct pt_device *pt) chan->vc.desc_free = pt_do_cleanup; vchan_init(&chan->vc, dma_dev);
- dma_set_mask_and_coherent(pt->dev, DMA_BIT_MASK(64)); - ret = dma_async_device_register(dma_dev); if (ret) goto err_reg;
On 2/20/2024 1:40 AM, Tadeusz Struk wrote:
The PTDMA driver sets DMA masks in two different places for the same device inconsistently. First call is in pt_pci_probe(), where it uses 48bit mask. The second call is in pt_dmaengine_register(), where it uses a 64bit mask. Using 64bit dma mask causes IO_PAGE_FAULT errors on DMA transfers between main memory and other devices. Without the extra call it works fine. Additionally the second call doesn't check the return value so it can silently fail. Remove the superfluous dma_set_mask() call and only use 48bit mask.
Cc: stable@vger.kernel.org Fixes: b0b4a6b10577 ("dmaengine: ptdma: register PTDMA controller as a DMA resource")
Signed-off-by: Tadeusz Struk tstruk@gigaio.com
drivers/dma/ptdma/ptdma-dmaengine.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/dma/ptdma/ptdma-dmaengine.c b/drivers/dma/ptdma/ptdma-dmaengine.c index 1aa65e5de0f3..f79240734807 100644 --- a/drivers/dma/ptdma/ptdma-dmaengine.c +++ b/drivers/dma/ptdma/ptdma-dmaengine.c @@ -385,8 +385,6 @@ int pt_dmaengine_register(struct pt_device *pt) chan->vc.desc_free = pt_do_cleanup; vchan_init(&chan->vc, dma_dev);
- dma_set_mask_and_coherent(pt->dev, DMA_BIT_MASK(64));
Looks good to me Reviewed-by: Basavaraj Natikar Basavaraj.Natikar@amd.com
ret = dma_async_device_register(dma_dev); if (ret) goto err_reg;
On 19-02-24, 21:10, Tadeusz Struk wrote:
The PTDMA driver sets DMA masks in two different places for the same device inconsistently. First call is in pt_pci_probe(), where it uses 48bit mask. The second call is in pt_dmaengine_register(), where it uses a 64bit mask. Using 64bit dma mask causes IO_PAGE_FAULT errors on DMA transfers between main memory and other devices. Without the extra call it works fine. Additionally the second call doesn't check the return value so it can silently fail. Remove the superfluous dma_set_mask() call and only use 48bit mask.
Cc: stable@vger.kernel.org Fixes: b0b4a6b10577 ("dmaengine: ptdma: register PTDMA controller as a DMA resource")
No empty line here please
Signed-off-by: Tadeusz Struk tstruk@gigaio.com
I cant pick this, it was sent by email which this patch was not signed-off by, please either resend from same id as sob or sign with both
drivers/dma/ptdma/ptdma-dmaengine.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/dma/ptdma/ptdma-dmaengine.c b/drivers/dma/ptdma/ptdma-dmaengine.c index 1aa65e5de0f3..f79240734807 100644 --- a/drivers/dma/ptdma/ptdma-dmaengine.c +++ b/drivers/dma/ptdma/ptdma-dmaengine.c @@ -385,8 +385,6 @@ int pt_dmaengine_register(struct pt_device *pt) chan->vc.desc_free = pt_do_cleanup; vchan_init(&chan->vc, dma_dev);
- dma_set_mask_and_coherent(pt->dev, DMA_BIT_MASK(64));
- ret = dma_async_device_register(dma_dev); if (ret) goto err_reg;
-- 2.43.2
On 2/22/24 14:56, Vinod Koul wrote:
Signed-off-by: Tadeusz Struktstruk@gigaio.com
I cant pick this, it was sent by email which this patch was not signed-off by, please either resend from same id as sob or sign with both
I will resend with a proper "From" line now. Thanks, Tadeusz
From: Tadeusz Struk tstruk@gigaio.com
The PTDMA driver sets DMA masks in two different places for the same device inconsistently. First call is in pt_pci_probe(), where it uses 48bit mask. The second call is in pt_dmaengine_register(), where it uses a 64bit mask. Using 64bit dma mask causes IO_PAGE_FAULT errors on DMA transfers between main memory and other devices. Without the extra call it works fine. Additionally the second call doesn't check the return value so it can silently fail. Remove the superfluous dma_set_mask() call and only use 48bit mask.
Cc: stable@vger.kernel.org Fixes: b0b4a6b10577 ("dmaengine: ptdma: register PTDMA controller as a DMA resource") Reviewed-by: Basavaraj Natikar Basavaraj.Natikar@amd.com Signed-off-by: Tadeusz Struk tstruk@gigaio.com --- drivers/dma/ptdma/ptdma-dmaengine.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/dma/ptdma/ptdma-dmaengine.c b/drivers/dma/ptdma/ptdma-dmaengine.c index 1aa65e5de0f3..f79240734807 100644 --- a/drivers/dma/ptdma/ptdma-dmaengine.c +++ b/drivers/dma/ptdma/ptdma-dmaengine.c @@ -385,8 +385,6 @@ int pt_dmaengine_register(struct pt_device *pt) chan->vc.desc_free = pt_do_cleanup; vchan_init(&chan->vc, dma_dev);
- dma_set_mask_and_coherent(pt->dev, DMA_BIT_MASK(64)); - ret = dma_async_device_register(dma_dev); if (ret) goto err_reg;
On Thu, 22 Feb 2024 17:30:53 +0100, Tadeusz Struk wrote:
The PTDMA driver sets DMA masks in two different places for the same device inconsistently. First call is in pt_pci_probe(), where it uses 48bit mask. The second call is in pt_dmaengine_register(), where it uses a 64bit mask. Using 64bit dma mask causes IO_PAGE_FAULT errors on DMA transfers between main memory and other devices. Without the extra call it works fine. Additionally the second call doesn't check the return value so it can silently fail. Remove the superfluous dma_set_mask() call and only use 48bit mask.
[...]
Applied, thanks!
[1/1] dmaengine: ptdma: use consistent DMA masks commit: df2515a17914ecfc2a0594509deaf7fcb8d191ac
Best regards,
On Mon, 19 Feb 2024 21:10:39 +0100, Tadeusz Struk wrote:
The PTDMA driver sets DMA masks in two different places for the same device inconsistently. First call is in pt_pci_probe(), where it uses 48bit mask. The second call is in pt_dmaengine_register(), where it uses a 64bit mask. Using 64bit dma mask causes IO_PAGE_FAULT errors on DMA transfers between main memory and other devices. Without the extra call it works fine. Additionally the second call doesn't check the return value so it can silently fail. Remove the superfluous dma_set_mask() call and only use 48bit mask.
[...]
Applied, thanks!
[1/1] dmaengine: ptdma: use consistent DMA masks commit: df2515a17914ecfc2a0594509deaf7fcb8d191ac
Best regards,
linux-stable-mirror@lists.linaro.org
-
Basavaraj Natikar -
Tadeusz Struk -
Tadeusz Struk -
Vinod Koul