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Commit b8b225da authored by Philip J Kelleher's avatar Philip J Kelleher Committed by Jens Axboe
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rsxx: Adding EEH check inside cregs timeout. 



Unfortunaly, our CPU register path does not do any kind of
EEH error checking. So to fix this issue, an ioread32 was
added to the CPU register timeout code. This way, the
driver can check to see if the timeout was caused by an EEH
error or not. This is a dummy read.

Signed-off-by: default avatarPhilip J Kelleher <pjk1939@linux.vnet.ibm.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 3eb8dcaf

drivers/block/rsxx/cregs.c

+9 −0
Original line number Diff line number Diff line
@@ -431,6 +431,15 @@ static int __issue_creg_rw(struct rsxx_cardinfo *card, 
	*hw_stat = completion.creg_status;



	if (completion.st) {

		/*

		* This read is needed to verify that there has not been any

		* extreme errors that might have occurred, i.e. EEH. The

		* function iowrite32 will not detect EEH errors, so it is

		* necessary that we recover if such an error is the reason

		* for the timeout. This is a dummy read.

		*/

		ioread32(card->regmap + SCRATCH);



		dev_warn(CARD_TO_DEV(card),

			"creg command failed(%d x%08x)\n",

			completion.st, addr);