From: Philip J Kelleher Date: Tue, 18 Jun 2013 19:49:48 +0000 (-0500) Subject: rsxx: Adding EEH check inside cregs timeout. X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=b8b225da139f5770d7689b189fd5debc58f4b35d;p=deliverable%2Flinux.git 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: Philip J Kelleher Signed-off-by: Jens Axboe --- diff --git a/drivers/block/rsxx/cregs.c b/drivers/block/rsxx/cregs.c index 4914464c19fc..926dce9c452f 100644 --- a/drivers/block/rsxx/cregs.c +++ b/drivers/block/rsxx/cregs.c @@ -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);