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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/drivers/media/pci/cx25821/cx25821-alsa.c
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..
@@ -1,19 +1,10 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  *  Driver for the Conexant CX25821 PCIe bridge
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  *
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  *  Copyright (C) 2009 Conexant Systems Inc.
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  *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
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  *	Based on SAA713x ALSA driver and CX88 driver
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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, version 2
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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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8
  */
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9
 
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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@@ -62,8 +53,8 @@
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 	struct cx25821_riscmem risc;
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 	void			*vaddr;
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 	struct scatterlist	*sglist;
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-	int                     sglen;
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-	int                     nr_pages;
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+	int			sglen;
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+	unsigned long		nr_pages;
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 };
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 struct cx25821_audio_dev {
..
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@@ -120,7 +111,7 @@
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 MODULE_PARM_DESC(debug, "enable debug messages");
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112
 
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 /****************************************************************************
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-			Module specific funtions
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+			Module specific functions
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  ****************************************************************************/
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 /* Constants taken from cx88-reg.h */
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 #define AUD_INT_DN_RISCI1       (1 <<  0)
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@@ -140,7 +131,8 @@
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 #define PCI_MSK_AUD_EXT   (1 <<  4)
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 #define PCI_MSK_AUD_INT   (1 <<  3)
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-static int cx25821_alsa_dma_init(struct cx25821_audio_dev *chip, int nr_pages)
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+static int cx25821_alsa_dma_init(struct cx25821_audio_dev *chip,
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+				 unsigned long nr_pages)
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 {
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 	struct cx25821_audio_buffer *buf = chip->buf;
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 	struct page *pg;
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@@ -148,11 +140,11 @@
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 	buf->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT);
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 	if (NULL == buf->vaddr) {
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-		dprintk(1, "vmalloc_32(%d pages) failed\n", nr_pages);
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+		dprintk(1, "vmalloc_32(%lu pages) failed\n", nr_pages);
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 		return -ENOMEM;
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 	}
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-	dprintk(1, "vmalloc is at addr 0x%p, size=%d\n",
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+	dprintk(1, "vmalloc is at addr 0x%p, size=%lu\n",
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 				buf->vaddr,
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 				nr_pages << PAGE_SHIFT);
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..
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@@ -186,7 +178,7 @@
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 	struct cx25821_audio_buffer *buf = dev->buf;
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179
 
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 	buf->sglen = dma_map_sg(&dev->pci->dev, buf->sglist,
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-			buf->nr_pages, PCI_DMA_FROMDEVICE);
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+			buf->nr_pages, DMA_FROM_DEVICE);
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182
 
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 	if (0 == buf->sglen) {
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 		pr_warn("%s: cx25821_alsa_map_sg failed\n", __func__);
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@@ -202,7 +194,7 @@
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 	if (!buf->sglen)
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 		return 0;
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-	dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->sglen, PCI_DMA_FROMDEVICE);
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+	dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->nr_pages, DMA_FROM_DEVICE);
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 	buf->sglen = 0;
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 	return 0;
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 }
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@@ -648,7 +640,6 @@
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 static const struct snd_pcm_ops snd_cx25821_pcm_ops = {
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 	.open = snd_cx25821_pcm_open,
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 	.close = snd_cx25821_close,
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-	.ioctl = snd_pcm_lib_ioctl,
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 	.hw_params = snd_cx25821_hw_params,
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 	.hw_free = snd_cx25821_hw_free,
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 	.prepare = snd_cx25821_prepare,
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@@ -674,7 +665,7 @@
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 	}
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 	pcm->private_data = chip;
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 	pcm->info_flags = 0;
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-	strcpy(pcm->name, name);
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+	strscpy(pcm->name, name, sizeof(pcm->name));
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 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops);
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 	return 0;
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@@ -725,7 +716,7 @@
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 		return err;
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 	}
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-	strcpy(card->driver, "cx25821");
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+	strscpy(card->driver, "cx25821", sizeof(card->driver));
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720
 
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 	/* Card "creation" */
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 	chip = card->private_data;
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@@ -754,10 +745,10 @@
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 		goto error;
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 	}
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-	strcpy(card->shortname, "cx25821");
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+	strscpy(card->shortname, "cx25821", sizeof(card->shortname));
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 	sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name,
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 		chip->iobase, chip->irq);
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-	strcpy(card->mixername, "CX25821");
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+	strscpy(card->mixername, "CX25821", sizeof(card->mixername));
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 	pr_info("%s/%i: ALSA support for cx25821 boards\n", card->driver,
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 		devno);