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[SCSI] ipr: Better handle adapter boot time errors 

If an ipr adapter encounters an adapter error requiring an
adapter reset to recover from prior to driver load time, the
error will be ignored and recovery will not happen until the
initial timeout occurs waiting for the firmware to come ready,
which means a five minute timeout. Fix is to read the interrupt
register before clearing any of the interrupts at probe time.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Brian King 2007-05-02 10:44:11 -05:00 committed by James Bottomley
parent a6bcbc2f5d
commit 473b1e8ed2
1 changed files with 6 additions and 1 deletions
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7
drivers/scsi/ipr.c
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@ -7444,7 +7444,7 @@ static int __devinit ipr_probe_ioa(struct pci_dev *pdev,
unsigned long ipr_regs_pci;
void __iomem *ipr_regs;
int rc = PCIBIOS_SUCCESSFUL;
volatile u32 mask, uproc;
volatile u32 mask, uproc, interrupts;
ENTER;
@ -7551,9 +7551,14 @@ static int __devinit ipr_probe_ioa(struct pci_dev *pdev,
* the card is in an unknown state and needs a hard reset
*/
mask = readl(ioa_cfg->regs.sense_interrupt_mask_reg);
interrupts = readl(ioa_cfg->regs.sense_interrupt_reg);
uproc = readl(ioa_cfg->regs.sense_uproc_interrupt_reg);
if ((mask & IPR_PCII_HRRQ_UPDATED) == 0 || (uproc & IPR_UPROCI_RESET_ALERT))
ioa_cfg->needs_hard_reset = 1;
if (interrupts & IPR_PCII_ERROR_INTERRUPTS)
ioa_cfg->needs_hard_reset = 1;
if (interrupts & IPR_PCII_IOA_UNIT_CHECKED)
ioa_cfg->ioa_unit_checked = 1;
ipr_mask_and_clear_interrupts(ioa_cfg, ~IPR_PCII_IOA_TRANS_TO_OPER);
rc = request_irq(pdev->irq, ipr_isr, IRQF_SHARED, IPR_NAME, ioa_cfg);