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Mon, 10 Aug 2026 21:22:43 -0700 (PDT) Received: from ryzen.lan ([2601:644:8000:7a86::e35]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-392ee41936asm33863a91.14.2026.08.10.21.22.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Aug 2026 21:22:42 -0700 (PDT) From: Rosen Penev To: linux-sound@vger.kernel.org Cc: Jaroslav Kysela , Takashi Iwai , linux-kernel@vger.kernel.org (open list) Subject: [PATCH] sound: pci: mixart: use managed resources for PCI and DMA allocations Date: Mon, 10 Aug 2026 21:22:41 -0700 Message-ID: <20260811042241.54317-1-rosenp@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Convert the Digigram miXart driver to use managed (devm_) resources for PCI device management, IRQ allocation, memory mapping, and DMA buffer allocation. This simplifies error handling paths and reduces the risk of resource leaks. - Use pcim_enable_device() and pcim_iomap_region() for managed PCI resource handling - Use devm_kzalloc() for manager structure allocation - Use devm_request_threaded_irq() for IRQ allocation - Use snd_devm_card_new() for sound card creation - Use snd_devm_alloc_pages() for DMA buffer allocation - Simplify snd_mixart_free() to only handle mailbox shutdown and board reset since other resources are now auto-released Clean up trailing whitespace on touched lines. Signed-off-by: Rosen Penev --- sound/pci/mixart/mixart.c | 90 +++++++++------------------------------ 1 file changed, 20 insertions(+), 70 deletions(-) diff --git a/sound/pci/mixart/mixart.c b/sound/pci/mixart/mixart.c index f451554cff5f..c4d7b4ca8909 100644 --- a/sound/pci/mixart/mixart.c +++ b/sound/pci/mixart/mixart.c @@ -274,7 +274,7 @@ snd_mixart_add_ref_pipe(struct snd_mixart *chip, int pc= m_number, int capture, int j; struct mixart_flowinfo *flowinfo; struct mixart_bufferinfo *bufferinfo; - =09 + /* we don't yet know the format, so config 16 bit pcm audio for instanc= e */ buf->sgroup_req.stream_info[i].size_max_byte_frame =3D 1024; buf->sgroup_req.stream_info[i].size_max_sample_frame =3D 256; @@ -627,7 +627,7 @@ static int snd_mixart_hw_params(struct snd_pcm_substrea= m *subs, if( subs->stream =3D=3D SNDRV_PCM_STREAM_CAPTURE ) { i +=3D MIXART_PLAYBACK_STREAMS; /* in array capture is behind playback = */ } - =09 + bufferinfo =3D (struct mixart_bufferinfo *)chip->mgr->bufferinfo.area; bufferinfo[i].buffer_address =3D subs->runtime->dma_addr; bufferinfo[i].available_length =3D subs->runtime->dma_bytes; @@ -1059,45 +1059,15 @@ int snd_mixart_create_pcm(struct snd_mixart* chip) */ static int snd_mixart_free(struct mixart_mgr *mgr) { - unsigned int i; - - for (i =3D 0; i < mgr->num_cards; i++) { - if (mgr->chip[i]) - snd_card_free(mgr->chip[i]->card); - } - /* stop mailbox */ snd_mixart_exit_mailbox(mgr); =20 - /* release irq */ - if (mgr->irq >=3D 0) - free_irq(mgr->irq, mgr); - /* reset board if some firmware was loaded */ if(mgr->dsp_loaded) { snd_mixart_reset_board(mgr); dev_dbg(&mgr->pci->dev, "reset miXart !\n"); } =20 - /* release the i/o ports */ - for (i =3D 0; i < 2; ++i) - iounmap(mgr->mem[i].virt); - - pci_release_regions(mgr->pci); - - /* free flowarray */ - if(mgr->flowinfo.area) { - snd_dma_free_pages(&mgr->flowinfo); - mgr->flowinfo.area =3D NULL; - } - /* free bufferarray */ - if(mgr->bufferinfo.area) { - snd_dma_free_pages(&mgr->bufferinfo); - mgr->bufferinfo.area =3D NULL; - } - - pci_disable_device(mgr->pci); - kfree(mgr); return 0; } =20 @@ -1146,11 +1116,11 @@ static const struct snd_info_entry_ops snd_mixart_p= roc_ops_BA1 =3D { }; =20 =20 -static void snd_mixart_proc_read(struct snd_info_entry *entry,=20 +static void snd_mixart_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { - struct snd_mixart *chip =3D entry->private_data; =20 - u32 ref;=20 + struct snd_mixart *chip =3D entry->private_data; + u32 ref; =20 snd_iprintf(buffer, "Digigram miXart (alsa card %d)\n\n", chip->chip_idx); =20 @@ -1164,7 +1134,7 @@ static void snd_mixart_proc_read(struct snd_info_entr= y *entry, default: snd_iprintf(buffer, "\tUNKNOWN!\n\n= "); break; } =20 - snd_iprintf(buffer, "- system load -\n"); =20 + snd_iprintf(buffer, "- system load -\n"); =20 /* get perf reference */ =20 @@ -1175,8 +1145,8 @@ static void snd_mixart_proc_read(struct snd_info_entr= y *entry, u32 streaming =3D 100 * readl_be( MIXART_MEM( chip->mgr, MIXART_PSEUDOR= EG_PERF_STREAM_LOAD_OFFSET)) / ref; u32 interr =3D 100 * readl_be( MIXART_MEM( chip->mgr, MIXART_PSEUDOR= EG_PERF_INTERR_LOAD_OFFSET)) / ref; =20 - snd_iprintf(buffer, "\tstreaming : %d\n", streaming); snd_iprintf(buffer, "\tmailbox : %d\n", mailbox); + snd_iprintf(buffer, "\tstreaming : %d\n", streaming); snd_iprintf(buffer, "\tinterrupts handling : %d\n\n", interr); } } /* endif elf loaded */ @@ -1192,7 +1162,7 @@ static void snd_mixart_proc_init(struct snd_mixart *c= hip) =20 if (! snd_card_proc_new(chip->card, "mixart_BA0", &entry)) { entry->content =3D SNDRV_INFO_CONTENT_DATA; - entry->private_data =3D chip->mgr;=09 + entry->private_data =3D chip->mgr; entry->c.ops =3D &snd_mixart_proc_ops_BA0; entry->size =3D MIXART_BA0_SIZE; } @@ -1228,7 +1198,7 @@ static int snd_mixart_probe(struct pci_dev *pci, } =20 /* enable PCI device */ - err =3D pci_enable_device(pci); + err =3D pcim_enable_device(pci); if (err < 0) return err; pci_set_master(pci); @@ -1237,46 +1207,29 @@ static int snd_mixart_probe(struct pci_dev *pci, if (dma_set_mask(&pci->dev, DMA_BIT_MASK(32)) < 0) { dev_err(&pci->dev, "architecture does not support 32bit PCI busmaster DMA\n"); - pci_disable_device(pci); return -ENXIO; } =20 /* */ - mgr =3D kzalloc_obj(*mgr); - if (! mgr) { - pci_disable_device(pci); + mgr =3D devm_kzalloc(&pci->dev, sizeof(*mgr), GFP_KERNEL); + if (!mgr) return -ENOMEM; - } =20 mgr->pci =3D pci; - mgr->irq =3D -1; =20 - /* resource assignment */ - err =3D pci_request_regions(pci, CARD_NAME); - if (err < 0) { - kfree(mgr); - pci_disable_device(pci); - return err; - } for (i =3D 0; i < 2; i++) { mgr->mem[i].phys =3D pci_resource_start(pci, i); - mgr->mem[i].virt =3D pci_ioremap_bar(pci, i); - if (!mgr->mem[i].virt) { - dev_err(&pci->dev, "unable to remap resource 0x%lx\n", - mgr->mem[i].phys); - snd_mixart_free(mgr); - return -EBUSY; - } + mgr->mem[i].virt =3D pcim_iomap_region(pci, i, CARD_NAME); + if (IS_ERR(mgr->mem[i].virt)) + return PTR_ERR(mgr->mem[i].virt); } =20 - if (request_threaded_irq(pci->irq, snd_mixart_interrupt, + if (devm_request_threaded_irq(&pci->dev, pci->irq, snd_mixart_interrupt, snd_mixart_threaded_irq, IRQF_SHARED, - KBUILD_MODNAME, mgr)) { - dev_err(&pci->dev, "unable to grab IRQ %d\n", pci->irq); - snd_mixart_free(mgr); + KBUILD_MODNAME, mgr)) return -EBUSY; - } + mgr->irq =3D pci->irq; =20 /* init mailbox */ @@ -1303,7 +1256,7 @@ static int snd_mixart_probe(struct pci_dev *pci, else idx =3D index[dev] + i; snprintf(tmpid, sizeof(tmpid), "%s-%d", id[dev] ? id[dev] : "MIXART", i); - err =3D snd_card_new(&pci->dev, idx, tmpid, THIS_MODULE, + err =3D snd_devm_card_new(&pci->dev, idx, tmpid, THIS_MODULE, 0, &card); =20 if (err < 0) { @@ -1321,7 +1274,6 @@ static int snd_mixart_probe(struct pci_dev *pci, =20 err =3D snd_mixart_create(mgr, card, i); if (err < 0) { - snd_card_free(card); snd_mixart_free(mgr); return err; } @@ -1344,8 +1296,7 @@ static int snd_mixart_probe(struct pci_dev *pci, /* create array of streaminfo */ size =3D PAGE_ALIGN( (MIXART_MAX_STREAM_PER_CARD * MIXART_MAX_CARDS * sizeof(struct mixart_flowinfo)) ); - if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &pci->dev, - size, &mgr->flowinfo) < 0) { + if (snd_devm_alloc_pages(&pci->dev, SNDRV_DMA_TYPE_DEV, size)) { snd_mixart_free(mgr); return -ENOMEM; } @@ -1355,8 +1306,7 @@ static int snd_mixart_probe(struct pci_dev *pci, /* create array of bufferinfo */ size =3D PAGE_ALIGN( (MIXART_MAX_STREAM_PER_CARD * MIXART_MAX_CARDS * sizeof(struct mixart_bufferinfo)) ); - if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &pci->dev, - size, &mgr->bufferinfo) < 0) { + if (snd_devm_alloc_pages(&pci->dev, SNDRV_DMA_TYPE_DEV, size)) { snd_mixart_free(mgr); return -ENOMEM; } --=20 2.55.0