From c9116ae45bd10eabe1e5cf88798092e184d8dbc2 Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Fri, 24 Aug 2007 09:18:04 +0200 Subject: [PATCH] [ALSA] cmipci: make the test for integrated MIDI port address more robust Unused bytes in the I/O register range are likely to have the value 0x00 instead of 0xff, so test against both values when checking for the presence of the integrated MIDI port. Signed-off-by: Clemens Ladisch Signed-off-by: Jaroslav Kysela --- sound/pci/cmipci.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/sound/pci/cmipci.c b/sound/pci/cmipci.c index 9d394c7..6021e5c 100644 --- a/sound/pci/cmipci.c +++ b/sound/pci/cmipci.c @@ -2827,7 +2827,7 @@ static int __devinit snd_cmipci_create(struct snd_card *card, struct pci_dev *pc }; unsigned int val = 0; long iomidi; - int integrated_midi; + int integrated_midi = 0; int pcm_index, pcm_spdif_index; static struct pci_device_id intel_82437vx[] = { { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82437VX) }, @@ -2939,11 +2939,14 @@ static int __devinit snd_cmipci_create(struct snd_card *card, struct pci_dev *pc return err; } - integrated_midi = cm->chip_version > 33 && - snd_cmipci_read_b(cm, CM_REG_MPU_PCI + 1) != 0xff; - if (integrated_midi && mpu_port[dev] == 1) - iomidi = cm->iobase + CM_REG_MPU_PCI; - else { + if (cm->chip_version > 33 && mpu_port[dev] == 1) { + val = snd_cmipci_read_b(cm, CM_REG_MPU_PCI + 1); + if (val != 0x00 && val != 0xff) { + iomidi = cm->iobase + CM_REG_MPU_PCI; + integrated_midi = 1; + } + } + if (!integrated_midi) { iomidi = mpu_port[dev]; switch (iomidi) { case 0x320: val = CM_VMPU_320; break; -- 1.8.2.3