[patch 09/20] tpm: interrupt clear fix

[Greg KH <gregkh@suse.de>]

-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Kylene Jo Hall <kjhall@us.ibm.com>

Under stress testing I found that the interrupt is not always cleared.
This is a bug and this patch should go into 2.6.18 and 2.6.17.x.

Signed-off-by: Kylene Hall <kjhall@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 drivers/char/tpm/tpm_tis.c |    1 +
 1 file changed, 1 insertion(+)

--- linux-2.6.17.8.orig/drivers/char/tpm/tpm_tis.c
+++ linux-2.6.17.8/drivers/char/tpm/tpm_tis.c
@@ -424,6 +424,7 @@ static irqreturn_t tis_int_handler(int i
 	iowrite32(interrupt,
 		  chip->vendor.iobase +
 		  TPM_INT_STATUS(chip->vendor.locality));
+	ioread32(chip->vendor.iobase + TPM_INT_STATUS(chip->vendor.locality));
 	return IRQ_HANDLED;
 }
 

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