[PATCH 1/2] ALSA: gus: Fix repeated probes of snd_gus_create()

[PATCH 1/2] ALSA: gus: Fix repeated probes of snd_gus_create()

[Takashi Iwai]

GUS card object may be repeatedly probed for the legacy ISA devices,
and the behavior doesn't fit with the devres resource management.

Revert partially back to the classical way for the snd_gus_card
object, so that the repeated calls of snd_gus_create() are allowed.

Fixes: 5b88da3c800f ("ALSA: gus: Allocate resources with device-managed APIs")
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/isa/gus/gus_main.c | 44 ++++++++++++++++++++++++++++------------
 1 file changed, 31 insertions(+), 13 deletions(-)

diff --git a/sound/isa/gus/gus_main.c b/sound/isa/gus/gus_main.c
index ae1e2542ee4a..3b46490271fe 100644
--- a/sound/isa/gus/gus_main.c
+++ b/sound/isa/gus/gus_main.c
@@ -87,10 +87,24 @@ static void snd_gus_init_control(struct snd_gus_card *gus)
 
 static int snd_gus_free(struct snd_gus_card *gus)
 {
-	if (gus->gf1.res_port2) {
-		snd_gf1_stop(gus);
-		snd_gus_init_dma_irq(gus, 0);
+	if (gus->gf1.res_port2 == NULL)
+		goto __hw_end;
+	snd_gf1_stop(gus);
+	snd_gus_init_dma_irq(gus, 0);
+      __hw_end:
+	release_and_free_resource(gus->gf1.res_port1);
+	release_and_free_resource(gus->gf1.res_port2);
+	if (gus->gf1.irq >= 0)
+		free_irq(gus->gf1.irq, (void *) gus);
+	if (gus->gf1.dma1 >= 0) {
+		disable_dma(gus->gf1.dma1);
+		free_dma(gus->gf1.dma1);
 	}
+	if (!gus->equal_dma && gus->gf1.dma2 >= 0) {
+		disable_dma(gus->gf1.dma2);
+		free_dma(gus->gf1.dma2);
+	}
+	kfree(gus);
 	return 0;
 }
 
@@ -116,7 +130,7 @@ int snd_gus_create(struct snd_card *card,
 	};
 
 	*rgus = NULL;
-	gus = devm_kzalloc(card->dev, sizeof(*gus), GFP_KERNEL);
+	gus = kzalloc(sizeof(*gus), GFP_KERNEL);
 	if (gus == NULL)
 		return -ENOMEM;
 	spin_lock_init(&gus->reg_lock);
@@ -142,33 +156,35 @@ int snd_gus_create(struct snd_card *card,
 	gus->gf1.reg_timerctrl = GUSP(gus, TIMERCNTRL);
 	gus->gf1.reg_timerdata = GUSP(gus, TIMERDATA);
 	/* allocate resources */
-	gus->gf1.res_port1 = devm_request_region(card->dev, port, 16,
-						 "GUS GF1 (Adlib/SB)");
+	gus->gf1.res_port1 = request_region(port, 16, "GUS GF1 (Adlib/SB)");
 	if (!gus->gf1.res_port1) {
 		snd_printk(KERN_ERR "gus: can't grab SB port 0x%lx\n", port);
+		snd_gus_free(gus);
 		return -EBUSY;
 	}
-	gus->gf1.res_port2 = devm_request_region(card->dev, port + 0x100, 12,
-						 "GUS GF1 (Synth)");
+	gus->gf1.res_port2 = request_region(port + 0x100, 12, "GUS GF1 (Synth)");
 	if (!gus->gf1.res_port2) {
 		snd_printk(KERN_ERR "gus: can't grab synth port 0x%lx\n", port + 0x100);
+		snd_gus_free(gus);
 		return -EBUSY;
 	}
-	if (irq >= 0 && devm_request_irq(card->dev, irq, snd_gus_interrupt, 0,
-					 "GUS GF1", (void *) gus)) {
+	if (irq >= 0 && request_irq(irq, snd_gus_interrupt, 0, "GUS GF1", (void *) gus)) {
 		snd_printk(KERN_ERR "gus: can't grab irq %d\n", irq);
+		snd_gus_free(gus);
 		return -EBUSY;
 	}
 	gus->gf1.irq = irq;
 	card->sync_irq = irq;
-	if (snd_devm_request_dma(card->dev, dma1, "GUS - 1")) {
+	if (request_dma(dma1, "GUS - 1")) {
 		snd_printk(KERN_ERR "gus: can't grab DMA1 %d\n", dma1);
+		snd_gus_free(gus);
 		return -EBUSY;
 	}
 	gus->gf1.dma1 = dma1;
 	if (dma2 >= 0 && dma1 != dma2) {
-		if (snd_devm_request_dma(card->dev, dma2, "GUS - 2")) {
+		if (request_dma(dma2, "GUS - 2")) {
 			snd_printk(KERN_ERR "gus: can't grab DMA2 %d\n", dma2);
+			snd_gus_free(gus);
 			return -EBUSY;
 		}
 		gus->gf1.dma2 = dma2;
@@ -193,8 +209,10 @@ int snd_gus_create(struct snd_card *card,
 	gus->gf1.volume_ramp = 25;
 	gus->gf1.smooth_pan = 1;
 	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, gus, &ops);
-	if (err < 0)
+	if (err < 0) {
+		snd_gus_free(gus);
 		return err;
+	}
 	*rgus = gus;
 	return 0;
 }
-- 
2.26.2

[PATCH 2/2] ALSA: gus: Fix repeated probe for ISA interwave card

[Takashi Iwai]

The legacy ISA probe tries to probe the card repeatedly, and this
would conflict with the refactoring using devres.  Put the card
creation out of the loop and only probe GUS object repeatedly.

Fixes: 5b88da3c800f ("ALSA: gus: Allocate resources with device-managed APIs")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/isa/gus/interwave.c | 61 ++++++++++++++++++++-------------------
 1 file changed, 31 insertions(+), 30 deletions(-)

diff --git a/sound/isa/gus/interwave.c b/sound/isa/gus/interwave.c
index 20f490e9d563..a04a9d3253f8 100644
--- a/sound/isa/gus/interwave.c
+++ b/sound/isa/gus/interwave.c
@@ -618,12 +618,19 @@ static int snd_interwave_card_new(struct device *pdev, int dev,
 	return 0;
 }
 
-static int snd_interwave_probe(struct snd_card *card, int dev)
+static int snd_interwave_probe_gus(struct snd_card *card, int dev,
+				   struct snd_gus_card **gusp)
+{
+	return snd_gus_create(card, port[dev], -irq[dev], dma1[dev], dma2[dev],
+			      0, 32, pcm_channels[dev], effect[dev], gusp);
+}
+
+static int snd_interwave_probe(struct snd_card *card, int dev,
+			       struct snd_gus_card *gus)
 {
 	int xirq, xdma1, xdma2;
 	struct snd_interwave *iwcard = card->private_data;
 	struct snd_wss *wss;
-	struct snd_gus_card *gus;
 #ifdef SNDRV_STB
 	struct snd_i2c_bus *i2c_bus;
 #endif
@@ -634,14 +641,6 @@ static int snd_interwave_probe(struct snd_card *card, int dev)
 	xdma1 = dma1[dev];
 	xdma2 = dma2[dev];
 
-	err = snd_gus_create(card,
-			     port[dev],
-			     -xirq, xdma1, xdma2,
-			     0, 32,
-			     pcm_channels[dev], effect[dev], &gus);
-	if (err < 0)
-		return err;
-
 	err = snd_interwave_detect(iwcard, gus, dev
 #ifdef SNDRV_STB
 				   , &i2c_bus
@@ -757,22 +756,6 @@ static int snd_interwave_probe(struct snd_card *card, int dev)
 	return 0;
 }
 
-static int snd_interwave_isa_probe1(int dev, struct device *devptr)
-{
-	struct snd_card *card;
-	int err;
-
-	err = snd_interwave_card_new(devptr, dev, &card);
-	if (err < 0)
-		return err;
-
-	err = snd_interwave_probe(card, dev);
-	if (err < 0)
-		return err;
-	dev_set_drvdata(devptr, card);
-	return 0;
-}
-
 static int snd_interwave_isa_match(struct device *pdev,
 				   unsigned int dev)
 {
@@ -788,6 +771,8 @@ static int snd_interwave_isa_match(struct device *pdev,
 static int snd_interwave_isa_probe(struct device *pdev,
 				   unsigned int dev)
 {
+	struct snd_card *card;
+	struct snd_gus_card *gus;
 	int err;
 	static const int possible_irqs[] = {5, 11, 12, 9, 7, 15, 3, -1};
 	static const int possible_dmas[] = {0, 1, 3, 5, 6, 7, -1};
@@ -814,19 +799,31 @@ static int snd_interwave_isa_probe(struct device *pdev,
 		}
 	}
 
+	err = snd_interwave_card_new(pdev, dev, &card);
+	if (err < 0)
+		return err;
+
 	if (port[dev] != SNDRV_AUTO_PORT)
-		return snd_interwave_isa_probe1(dev, pdev);
+		err = snd_interwave_probe_gus(card, dev, &gus);
 	else {
 		static const long possible_ports[] = {0x210, 0x220, 0x230, 0x240, 0x250, 0x260};
 		int i;
 		for (i = 0; i < ARRAY_SIZE(possible_ports); i++) {
 			port[dev] = possible_ports[i];
-			err = snd_interwave_isa_probe1(dev, pdev);
+			err = snd_interwave_probe_gus(card, dev, &gus);
 			if (! err)
 				return 0;
 		}
-		return err;
 	}
+	if (err < 0)
+		return err;
+
+	err = snd_interwave_probe(card, dev, gus);
+	if (err < 0)
+		return err;
+
+	dev_set_drvdata(pdev, card);
+	return 0;
 }
 
 static struct isa_driver snd_interwave_driver = {
@@ -844,6 +841,7 @@ static int snd_interwave_pnp_detect(struct pnp_card_link *pcard,
 {
 	static int dev;
 	struct snd_card *card;
+	struct snd_gus_card *gus;
 	int res;
 
 	for ( ; dev < SNDRV_CARDS; dev++) {
@@ -860,7 +858,10 @@ static int snd_interwave_pnp_detect(struct pnp_card_link *pcard,
 	res = snd_interwave_pnp(dev, card->private_data, pcard, pid);
 	if (res < 0)
 		return res;
-	res = snd_interwave_probe(card, dev);
+	res = snd_interwave_probe_gus(card, dev, &gus);
+	if (res < 0)
+		return res;
+	res = snd_interwave_probe(card, dev, gus);
 	if (res < 0)
 		return res;
 	pnp_set_card_drvdata(pcard, card);
-- 
2.26.2