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Commit ab5dbebe authored by Mike Miller's avatar Mike Miller Committed by Jens Axboe
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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: default avatarJens Axboe <axboe@kernel.dk>
parent b8d8bdfe

drivers/block/cciss.c

+7 −0
Original line number Diff line number Diff line
@@ -4557,6 +4557,13 @@ static int cciss_controller_hard_reset(struct pci_dev *pdev, 
		pmcsr &= ~PCI_PM_CTRL_STATE_MASK;

		pmcsr |= PCI_D0;

		pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);



		/*

		 * 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.

		 */

		msleep(500);

	}

	return 0;

}