[v2,0/3] fix mediatek UART APDMA desc logic

Message

Guillaume Ranquet May 13, 2021, 7:26 p.m. UTC

The logic used in the apdma driver to handle the virt_dma_desc caused
panics and various memory corruption.
This is an attempt at sanitizing the logic a bit.

Sending a v2 as the previous mails were ill formatted and not threaded
properly.
I'm also removing the last patch from the series as the fix is
alread on mainline.

Guillaume Ranquet (3):
  dmaengine: mediatek: free the proper desc in desc_free handler
  dmaengine: mediatek: do not issue a new desc if one is still current
  dmaengine: mediatek: use GFP_NOWAIT instead of GFP_ATOMIC in prep_dma

 drivers/dma/mediatek/mtk-uart-apdma.c | 27 ++++++++++++++-------------
 1 file changed, 14 insertions(+), 13 deletions(-)

Comments

Vinod Koul June 7, 2021, 6:53 a.m. UTC | #1

On 13-05-21, 21:26, Guillaume Ranquet wrote:
> The logic used in the apdma driver to handle the virt_dma_desc caused
> panics and various memory corruption.
> This is an attempt at sanitizing the logic a bit.

Applied, thanks