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[v4,0/2] dmaengine: ti: k3-udma: Fix NULL pointer dereference error

Message ID 20211031032411.27235-1-kishon@ti.com (mailing list archive)
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Series dmaengine: ti: k3-udma: Fix NULL pointer dereference error | expand

Message

Kishon Vijay Abraham I Oct. 31, 2021, 3:24 a.m. UTC 
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 <peter.ujfalusi@gmail.com>" and cc'ed
stable

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
commits.

v1 => https://lore.kernel.org/r/20210209090036.30832-1-kishon@ti.com
v2 => https://lore.kernel.org/r/20211027055625.11150-1-kishon@ti.com
v3 => https://lore.kernel.org/r/20211029151251.26421-1-kishon@ti.com

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(-)