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| author | Tudor Ambarus <tudor.ambarus@microchip.com> | 2020-01-23 14:03:06 +0000 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-02-25 11:27:27 +0530 |
| commit | ad16bc232dd72f85984c790e07c69009b7c850c8 (patch) | |
| tree | 5bbe4d155f66038df71ac4f10309e776816cafbe /drivers/dma/at_hdmac_regs.h | |
| parent | bbc58394d81110f76586d3053fd5a3a3ad616050 (diff) | |
| download | linux-ad16bc232dd72f85984c790e07c69009b7c850c8.tar.bz2 | |
dmaengine: at_hdmac: Return err in case the chan is not free at alloc res time
Having a list of descriptors allocated for the channel at
device_alloc_chan_resources() time is a sign for bad free usage.
Return err and add a debug message in case the channel is not
free from a previous use.
atchan->descs_allocated becomes useless, get rid of it. More,
drop the error message in atc_desc_get() because now it would
introduce an extra if statement. The callers of atc_desc_get()
already print error messages in case the callee fails, no one
is hurt.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Link: https://lore.kernel.org/r/20200123140237.125799-3-tudor.ambarus@microchip.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/at_hdmac_regs.h')
| -rw-r--r-- | drivers/dma/at_hdmac_regs.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/dma/at_hdmac_regs.h b/drivers/dma/at_hdmac_regs.h index fe8a5853ec49..397692e937b3 100644 --- a/drivers/dma/at_hdmac_regs.h +++ b/drivers/dma/at_hdmac_regs.h @@ -243,7 +243,6 @@ enum atc_status { * @active_list: list of descriptors dmaengine is being running on * @queue: list of descriptors ready to be submitted to engine * @free_list: list of descriptors usable by the channel - * @descs_allocated: records the actual size of the descriptor pool */ struct at_dma_chan { struct dma_chan chan_common; @@ -264,7 +263,6 @@ struct at_dma_chan { struct list_head active_list; struct list_head queue; struct list_head free_list; - unsigned int descs_allocated; }; #define channel_readl(atchan, name) \ |