From: Kylene Jo Hall <kjhall@us.ibm.com>
Date: Fri, 26 May 2006 01:44:27 +0000 (-0700)
Subject: [PATCH] tpm: fix bug for TPM on ThinkPad T60 and Z60
X-Git-Tag: v2.6.17-rc6~106
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=087377a4307e18225f6452af5e71fe763c088c4e;p=linux-2.6

[PATCH] tpm: fix bug for TPM on ThinkPad T60 and Z60

The TPM chip on the ThinkPad T60 and Z60 machines is returning 0xFFFF for
the vendor ID which is a check the driver made to double check it was
actually talking to the memory mapped space of a TPM.  This patch removes
the check since it isn't absolutely necessary and was causing device
discovery to fail on these machines.

Signed-off-by: Kylene Hall <kjhall@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index f621168f38..8ea70625f7 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -457,10 +457,6 @@ static int __devinit tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
 	}
 
 	vendor = ioread32(chip->vendor.iobase + TPM_DID_VID(0));
-	if ((vendor & 0xFFFF) == 0xFFFF) {
-		rc = -ENODEV;
-		goto out_err;
-	}
 
 	/* Default timeouts */
 	chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);