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Fri, 8 Jun 2018 05:45:53 +0000 From: Robin Gong To: vkoul@kernel.org, s.hauer@pengutronix.de, dan.j.williams@intel.com Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com Subject: [PATCH v2 4/5] dmaengine: imx-sdma: remove the maximum limation for bd numbers Date: Fri, 8 Jun 2018 21:44:49 +0800 Message-Id: <1528465490-19684-5-git-send-email-yibin.gong@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1528465490-19684-1-git-send-email-yibin.gong@nxp.com> References: <1528465490-19684-1-git-send-email-yibin.gong@nxp.com> MIME-Version: 1.0 X-Originating-IP: [119.31.174.66] X-ClientProxiedBy: HK2PR0401CA0014.apcprd04.prod.outlook.com (2603:1096:202:2::24) To VI1PR04MB3232.eurprd04.prod.outlook.com (2603:10a6:802:6::29) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-Microsoft-Antispam: UriScan:; BCL:0; PCL:0; RULEID:(7020095)(4652020)(48565401081)(5600026)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7153060)(7193020); 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Signed-off-by: Robin Gong --- drivers/dma/imx-sdma.c | 14 -------------- 1 file changed, 14 deletions(-) diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index 6faec89..afaee72 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -292,7 +292,6 @@ struct sdma_context_data { u32 scratch7; } __attribute__ ((packed)); -#define NUM_BD (int)(PAGE_SIZE / sizeof(struct sdma_buffer_descriptor)) struct sdma_engine; @@ -1297,13 +1296,6 @@ static struct dma_async_tx_descriptor *sdma_prep_slave_sg( if (ret) goto err_bd_out; - if (sg_len > NUM_BD) { - dev_err(sdma->dev, "SDMA channel %d: maximum number of sg exceeded: %d > %d\n", - channel, sg_len, NUM_BD); - ret = -EINVAL; - goto err_bd_out; - } - desc->chn_count = 0; for_each_sg(sgl, sg, sg_len, i) { struct sdma_buffer_descriptor *bd = &desc->bd[i]; @@ -1413,12 +1405,6 @@ static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic( if (ret) goto err_bd_out; - if (num_periods > NUM_BD) { - dev_err(sdma->dev, "SDMA channel %d: maximum number of sg exceeded: %d > %d\n", - channel, num_periods, NUM_BD); - goto err_bd_out; - } - if (period_len > 0xffff) { dev_err(sdma->dev, "SDMA channel %d: maximum period size exceeded: %zu > %d\n", channel, period_len, 0xffff);