Re: [PATCH 1/3 v5.4.y] dmaengine: ti: edma: Add support for handling reserved channels

[Sasha Levin <sashal@kernel.org>]

[ Sasha's backport helper bot ]

Hi,

Summary of potential issues:
⚠️ Found matching upstream commit but patch is missing proper reference to it

Found matching upstream commit: 31f4b28f6c41f734957ea66ac84c6abb69e696f0

WARNING: Author mismatch between patch and found commit:
Backport author: Hardik Gohil<hgohil@mvista.com>
Commit author: Peter Ujfalusi<peter.ujfalusi@ti.com>

Status in newer kernel trees:
6.14.y | Present (exact SHA1)
6.12.y | Present (exact SHA1)
6.6.y | Present (exact SHA1)
6.1.y | Present (exact SHA1)
5.15.y | Present (exact SHA1)
5.10.y | Present (exact SHA1)

Note: The patch differs from the upstream commit:
---
1:  31f4b28f6c41f ! 1:  f2bbef69f3dbe dmaengine: ti: edma: Add support for handling reserved channels
    @@ Commit message
         Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
         Link: https://lore.kernel.org/r/20191025073056.25450-4-peter.ujfalusi@ti.com
         Signed-off-by: Vinod Koul <vkoul@kernel.org>
    +    Signed-off-by: Hardik Gohil <hgohil@mvista.com>
     
      ## drivers/dma/ti/edma.c ##
     @@ drivers/dma/ti/edma.c: struct edma_cc {
    @@ drivers/dma/ti/edma.c: static int edma_alloc_channel(struct edma_chan *echan,
      	edma_or_array2(ecc, EDMA_DRAE, 0, EDMA_REG_ARRAY_INDEX(channel),
      		       EDMA_CHANNEL_BIT(channel));
     @@ drivers/dma/ti/edma.c: static int edma_probe(struct platform_device *pdev)
    - {
      	struct edma_soc_info	*info = pdev->dev.platform_data;
      	s8			(*queue_priority_mapping)[2];
    + 	int			i, off;
     -	const s16		(*rsv_slots)[2];
    -+	const s16		(*reserved)[2];
    - 	int			i, irq;
    ++	const s16               (*reserved)[2];
    + 	const s16		(*xbar_chans)[2];
    + 	int			irq;
      	char			*irq_name;
    - 	struct resource		*mem;
     @@ drivers/dma/ti/edma.c: static int edma_probe(struct platform_device *pdev)
      	if (!ecc->slot_inuse)
      		return -ENOMEM;
    @@ drivers/dma/ti/edma.c: static int edma_probe(struct platform_device *pdev)
      
      		ecc->tc_list = devm_kcalloc(dev, ecc->num_tc,
     @@ drivers/dma/ti/edma.c: static int edma_probe(struct platform_device *pdev)
    - 				info->default_queue = i;
      			}
    + 			of_node_put(tc_args.np);
      		}
     +
     +		/* See if we have optional dma-channel-mask array */
---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-5.4.y        |  Success    |  Success   |