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Typically ll_max is around 170 for a 4 KB page and four DMA R/W channels. It is uncommon for a single DMA request to reach this limit, so the issue has not been observed in practice. However, if it occurs, the driver may overwrite adjacent memory before reporting an error. Remove the incorrect assignment so the calculated ll_max is honored Fixes: 31fb8c1ff962d ("dmaengine: dw-edma: Improve the linked list and data= blocks definition") Signed-off-by: Frank Li --- drivers/dma/dw-edma/dw-edma-core.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-ed= ma-core.c index c6b014949afe82f10362711fc8a956fe60a72835..b154bdd7f2897d9a28df698a425= afc1b1c93698b 100644 --- a/drivers/dma/dw-edma/dw-edma-core.c +++ b/drivers/dma/dw-edma/dw-edma-core.c @@ -770,7 +770,6 @@ static int dw_edma_channel_setup(struct dw_edma *dw, u3= 2 wr_alloc, u32 rd_alloc) chan->ll_max =3D (chip->ll_region_wr[chan->id].sz / EDMA_LL_SZ); else chan->ll_max =3D (chip->ll_region_rd[chan->id].sz / EDMA_LL_SZ); - chan->ll_max -=3D 1; =20 dev_vdbg(dev, "L. List:\tChannel %s[%u] max_cnt=3D%u\n", str_write_read(chan->dir =3D=3D EDMA_DIR_WRITE), --=20 2.34.1