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

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Date:   Sun, 31 Oct 2021 08:54:09 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Peter Ujfalusi <peter.ujfalusi@...il.com>,
        Vinod Koul <vkoul@...nel.org>
CC:     <dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        Kishon Vijay Abraham I <kishon@...com>
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 <peter.ujfalusi@...il.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(-)

-- 
2.17.1