-------- Forwarded Message --------
From: Kylene Jo Hall <[email protected]>
To: linux-os (Dick Johnson) <[email protected]>
Cc: linux-kernel <[email protected]>, TPM Device Driver List
<[email protected]>, [email protected]
Subject: Re: [PATCH] tpm: interrupt clear fix
Date: Thu, 13 Jul 2006 12:24:36 -0700
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.
On Thu, 2006-07-13 at 07:45 -0400, linux-os (Dick Johnson) wrote:
> PCI devices need a final read to flush all pending writes. Whatever
> mb() does, just hides the problem.
Signed-off-by: Kylene Hall <[email protected]>
---
--- linux-2.6.18-rc1/drivers/char/tpm/tpm_tis.c 2006-07-13 14:46:39.727500500 -0500
+++ linux-2.6.18-rc1-tpm/drivers/char/tpm/tpm_tis.c 2006-07-13 14:47:33.878884750 -0500
@@ -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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