add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/ata/pdc_adma.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *  pdc_adma.c - Pacific Digital Corporation ADMA
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  *
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@@ -5,31 +6,14 @@
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  *
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  *  Copyright 2005 Mark Lord
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  *
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- *  This program is free software; you can redistribute it and/or modify
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- *  it under the terms of the GNU General Public License as published by
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- *  the Free Software Foundation; either version 2, or (at your option)
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- *  any later version.
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- *
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- *  This program is distributed in the hope that it will be useful,
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- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- *  GNU General Public License for more details.
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- *
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- *  You should have received a copy of the GNU General Public License
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- *  along with this program; see the file COPYING.  If not, write to
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- *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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- *
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- *
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  *  libata documentation is available via 'make {ps|pdf}docs',
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  *  as Documentation/driver-api/libata.rst
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- *
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  *
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  *  Supports ATA disks in single-packet ADMA mode.
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  *  Uses PIO for everything else.
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  *
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  *  TODO:  Use ADMA transfers for ATAPI devices, when possible.
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  *  This requires careful attention to a number of quirks of the chip.
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- *
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  */
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 #include <linux/kernel.h>
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@@ -567,7 +551,6 @@
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 						(u32)pp->pkt_dma);
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 		return -ENOMEM;
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 	}
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-	memset(pp->pkt, 0, ADMA_PKT_BYTES);
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 	ap->private_data = pp;
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 	adma_reinit_engine(ap);
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 	return 0;
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@@ -588,23 +571,6 @@
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 	/* reset the ADMA logic */
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 	for (port_no = 0; port_no < ADMA_PORTS; ++port_no)
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 		adma_reset_engine(host->ports[port_no]);
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-}
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-
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-static int adma_set_dma_masks(struct pci_dev *pdev, void __iomem *mmio_base)
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-{
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-	int rc;
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-
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-	rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
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-	if (rc) {
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-		dev_err(&pdev->dev, "32-bit DMA enable failed\n");
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-		return rc;
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-	}
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-	rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
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-	if (rc) {
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-		dev_err(&pdev->dev, "32-bit consistent DMA enable failed\n");
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-		return rc;
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-	}
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-	return 0;
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 }
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 static int adma_ata_init_one(struct pci_dev *pdev,
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@@ -637,9 +603,11 @@
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 	host->iomap = pcim_iomap_table(pdev);
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 	mmio_base = host->iomap[ADMA_MMIO_BAR];
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-	rc = adma_set_dma_masks(pdev, mmio_base);
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-	if (rc)
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+	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
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+	if (rc) {
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+		dev_err(&pdev->dev, "32-bit DMA enable failed\n");
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 		return rc;
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+	}
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 	for (port_no = 0; port_no < ADMA_PORTS; ++port_no) {
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 		struct ata_port *ap = host->ports[port_no];