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Date:   Sun, 31 Oct 2021 08:54:09 +0530
From:   Kishon Vijay Abraham I <>
To:     Peter Ujfalusi <>,
        Vinod Koul <>
CC:     <>, <>,
        Vignesh Raghavendra <>,
        Kishon Vijay Abraham I <>
Subject: [PATCH v4 0/2] dmaengine: ti: k3-udma: Fix NULL pointer dereference error

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 v3:
1) Fix commit subject
2) Add "Acked-by: Peter Ujfalusi <>" and cc'ed

Changes from v2:
1) Fix commit subject and commit log to mention bchan/rchan/tchan to NULL
   suggested by Peter.

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

v1 =>
v2 =>
v3 =>

Kishon Vijay Abraham I (2):
  dmaengine: ti: k3-udma: Set bchan to NULL if a channel request fail
  dmaengine: ti: k3-udma: Set r/tchan or rflow to NULL if request fail

 drivers/dma/ti/k3-udma.c | 32 ++++++++++++++++++++++++++------
 1 file changed, 26 insertions(+), 6 deletions(-)


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