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 <[e-mail]>
Cc: Debora Velarde <[e-mail]>
Cc: Marcel Selhorst <[e-mail]>
Cc: James Morris <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Rajiv Andrade <[e-mail]>
Acked-by: Mimi Zohar <[e-mail]>
Tested-by: Mimi Zohar <[e-mail]>
Signed-off-by: James Morris <[e-mail]>

drivers/char/tpm/tpm.c

···
 
 	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)