Hi Kishon, On 29/10/2021 18:12, Kishon Vijay Abraham I wrote: > NULL pointer de-reference error was observed when all the PCIe endpoint > functions (22 function in J721E) request a DMA channel. The issue was > specfically observed when using mem-to-mem copy. > > Changes from v2: > 1) Fix commit subject and commit log to mention bchan/rchan/tchan to NULL > suggested by Peter. Looks good, however the second patch also fixes the rflow. It is mentioned in the commit message itself. I suppose the reason for a split is that the UDMA part (rchan/tchan/rflow) could be backported as fix for older kernel since the bchan came later with BCDMA/PKTDMA support? Can you find a good Fixes tag for these? > > Changes from v1: > 1) Split the patch for BCDMA and PKTDMA separately > 2) Fixed the return value of udma_get_rflow() to 0. > 3) Removed the fixes tag as the patches does not directly apply to the > commits. > > v1 => https://lore.kernel.org/r/20210209090036.30832-1-kishon@xxxxxx > v2 => https://lore.kernel.org/r/20211027055625.11150-1-kishon@xxxxxx > > Kishon Vijay Abraham I (2): > dmaengine: ti: k3-udma: Set bchan to NULL if a channel request fail > dmaengine: ti: k3-udma: Set rchan/tchan to NULL if a channel request > fail dmaengine: ti: k3-udma: Set r/tchan or rflow to NULL if request fail would have bee a better subject line, if you feel you can send an update. Acked-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxx> > > drivers/dma/ti/k3-udma.c | 32 ++++++++++++++++++++++++++------ > 1 file changed, 26 insertions(+), 6 deletions(-) > -- Péter
