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dmx3191d: Use NO_IRQ

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Testing shows that the Domex 3191D card never asserts its IRQ. Hence it is
non-functional with Linux (worse, the EH bugs in the core driver are fatal
but that's a problem for another patch). Perhaps the DT-536 chip needs
special setup? I can't find documentation for it. The NetBSD driver uses
polling apparently because of this issue.

Set host->irq = NO_IRQ so the core driver will prevent targets from
disconnecting. Don't request host->irq.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Finn Thain 2014-11-12 16:12:03 +11:00 committed by Christoph Hellwig
parent 710ddd0d50
commit fd9cd67c3d
1 changed files with 8 additions and 17 deletions
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25
drivers/scsi/dmx3191d.c
View File

@ -34,6 +34,8 @@
* Definitions for the generic 5380 driver.
*/
#define DONT_USE_INTR
#define NCR5380_read(reg) inb(port + reg)
#define NCR5380_write(reg, value) outb(value, port + reg)
@ -89,32 +91,23 @@ static int dmx3191d_probe_one(struct pci_dev *pdev,
if (!shost)
goto out_release_region;
shost->io_port = io;
shost->irq = pdev->irq;
/* This card does not seem to raise an interrupt on pdev->irq.
* Steam-powered SCSI controllers run without an IRQ anyway.
*/
shost->irq = NO_IRQ;
NCR5380_init(shost, FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E);
if (request_irq(pdev->irq, NCR5380_intr, IRQF_SHARED,
DMX3191D_DRIVER_NAME, shost)) {
/*
* Steam powered scsi controllers run without an IRQ anyway
*/
printk(KERN_WARNING "dmx3191: IRQ %d not available - "
"switching to polled mode.\n", pdev->irq);
shost->irq = NO_IRQ;
}
pci_set_drvdata(pdev, shost);
error = scsi_add_host(shost, &pdev->dev);
if (error)
goto out_free_irq;
goto out_release_region;
scsi_scan_host(shost);
return 0;
out_free_irq:
if (shost->irq != NO_IRQ)
free_irq(shost->irq, shost);
out_release_region:
release_region(io, DMX3191D_REGION_LEN);
out_disable_device:
@ -131,8 +124,6 @@ static void dmx3191d_remove_one(struct pci_dev *pdev)
NCR5380_exit(shost);
if (shost->irq != NO_IRQ)
free_irq(shost->irq, shost);
release_region(shost->io_port, DMX3191D_REGION_LEN);
pci_disable_device(pdev);