TPM: fix pcrread

The previously sent patch:

http://marc.info/?l=tpmdd-devel&m=125208945007834&w=2

Had its first hunk cropped when merged, submitting only this first hunk
again.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Debora Velarde <debora@linux.vnet.ibm.com>
Cc: Marcel Selhorst <m.selhorst@sirrix.com>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Acked-by: Mimi Zohar <zohar@us.ibm.com>
Tested-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index 45d58002b06c..47c2d2763456 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -696,8 +696,7 @@ int __tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
 
         cmd.header.in = pcrread_header;
         cmd.params.pcrread_in.pcr_idx = cpu_to_be32(pcr_idx);
-        BUG_ON(cmd.header.in.length > READ_PCR_RESULT_SIZE);
-        rc = transmit_cmd(chip, &cmd, cmd.header.in.length,
+        rc = transmit_cmd(chip, &cmd, READ_PCR_RESULT_SIZE,
                           "attempting to read a pcr value");
 
         if (rc == 0)