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atp870u: Request IRQ later, remove weird locking

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Allocate IRQ later during probe to avoid code duplication and also
remove the need for weird locking in _probe.
(It was probably there to prevent race with the IRQ handler?)

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Reviewed-by: Hannes Reinicke <hare@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ondrej Zary 2015-11-17 19:24:23 +01:00 committed by Martin K. Petersen
parent 11ec131804
commit 1729c0d22b
1 changed files with 12 additions and 35 deletions
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47
drivers/scsi/atp870u.c
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@ -1253,7 +1253,6 @@ static void atp_set_host_id(struct atp_unit *atp, u8 c, u8 host_id)
static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
unsigned char k, m, c;
unsigned long flags;
unsigned int error,n;
unsigned char host_id;
struct Scsi_Host *shpnt = NULL;
@ -1374,13 +1373,6 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto unregister;
}
err = request_irq(shpnt->irq, atp870u_intr_handle, IRQF_SHARED, "atp880i", shpnt);
if (err) {
printk(KERN_ERR "Unable to allocate IRQ%d for Acard controller.\n", shpnt->irq);
goto free_tables;
}
spin_lock_irqsave(shpnt->host_lock, flags);
k = atp_readb_base(atpdev, 0x38) & 0x80;
atp_writeb_base(atpdev, 0x38, k);
atp_writeb_base(atpdev, 0x3b, 0x20);
@ -1412,17 +1404,6 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto unregister;
}
#ifdef ED_DBGP
printk("request_irq() shpnt %p hostdata %p\n", shpnt, atpdev);
#endif
err = request_irq(shpnt->irq, atp870u_intr_handle, IRQF_SHARED, "atp870u", shpnt);
if (err) {
printk(KERN_ERR "Unable to allocate IRQ for Acard controller.\n");
goto free_tables;
}
spin_lock_irqsave(shpnt->host_lock, flags);
c = atp_readb_base(atpdev, 0x29);
atp_writeb_base(atpdev, 0x29, c | 0x04);
@ -1558,13 +1539,6 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto unregister;
}
err = request_irq(shpnt->irq, atp870u_intr_handle, IRQF_SHARED, "atp870i", shpnt);
if (err) {
printk(KERN_ERR "Unable to allocate IRQ%d for Acard controller.\n", shpnt->irq);
goto free_tables;
}
spin_lock_irqsave(shpnt->host_lock, flags);
if (pdev->revision > 0x07) /* check if atp876 chip then enable terminator */
atp_writeb_base(atpdev, 0x3e, 0x00);
@ -1586,15 +1560,18 @@ static int atp870u_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
shpnt->this_id = host_id;
}
spin_unlock_irqrestore(shpnt->host_lock, flags);
err = scsi_add_host(shpnt, &pdev->dev);
if (err)
goto scsi_add_fail;
scsi_scan_host(shpnt);
#ifdef ED_DBGP
printk("atp870u_prob : exit\n");
#endif
return 0;
err = request_irq(shpnt->irq, atp870u_intr_handle, IRQF_SHARED, "atp870u", shpnt);
if (err) {
dev_err(&pdev->dev, "Unable to allocate IRQ %d.\n", shpnt->irq);
goto free_tables;
}
err = scsi_add_host(shpnt, &pdev->dev);
if (err)
goto scsi_add_fail;
scsi_scan_host(shpnt);
return 0;
scsi_add_fail:
free_irq(shpnt->irq, shpnt);