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cciss: add small delay when using PCI Power Management to reset for kump
The P600 requires a small delay when changing states. Otherwise we may think the board did not reset and we bail. This for kdump only and is particular to the P600. Cc: stable@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -4557,6 +4557,13 @@ static int cciss_controller_hard_reset(struct pci_dev *pdev,
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pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
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pmcsr |= PCI_D0;
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pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
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/*
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* The P600 requires a small delay when changing states.
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* Otherwise we may think the board did not reset and we bail.
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* This for kdump only and is particular to the P600.
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*/
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msleep(500);
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}
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return 0;
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}
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