TPM: fix TIS device driver locality request

During the initialization of the TPM TIS driver, the necessary locality has
to be requested earlier in the init-process.  Depending on the used TPM
chip, this leads to wrong information.  For example: Lenovo X61s with Atmel
TPM:

tpm_tis 00:0a: 1.2 TPM (device-id 0xFFFF, rev-id 255)

But correct is:

tpm_tis 00:0c: 1.2 TPM (device-id 0x3203, rev-id 9)

This short patch fixes this issue.

Signed-off-by: Marcel Selhorst <tpm@selhorst.net>
Cc: Kylene Jo Hall <kjhall@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index fd771a4d6d18ccff342f0fbb0806f819eb93cebf..81503d94fecca00062582831d7112f8c1acf9374 100644 (file)
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -450,6 +450,11 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
                goto out_err;
        }
 
+       if (request_locality(chip, 0) != 0) {
+               rc = -ENODEV;
+               goto out_err;
+       }
+
        vendor = ioread32(chip->vendor.iobase + TPM_DID_VID(0));
 
        /* Default timeouts */
@@ -487,11 +492,6 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
        if (intfcaps & TPM_INTF_DATA_AVAIL_INT)
                dev_dbg(dev, "\tData Avail Int Support\n");
 
-       if (request_locality(chip, 0) != 0) {
-               rc = -ENODEV;
-               goto out_err;
-       }
-
        /* INTERRUPT Setup */
        init_waitqueue_head(&chip->vendor.read_queue);
        init_waitqueue_head(&chip->vendor.int_queue);