ALSA: gus: Fix repeated probes of snd_gus_create()

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 <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Takashi Iwai <[e-mail]>

sound/isa/gus/gus_main.c

···
 
 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;
 }
 
···
 	};
 
 	*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);
···
 	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;
···
 	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;
 }