X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Fchar%2Ftpm%2Ftpm.c;h=45d58002b06c0087ad5ece5a2bbb14a844f574c0;hb=c82ffab9a857f8286ed2b559624b7005a367b638;hp=32b957efa42047af3065b6e30c31827031e94159;hpb=a724eada8c2a7b62463b73ccf73fd0bb6e928aeb;p=mv-sheeva.git

diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index 32b957efa42..45d58002b06 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -742,7 +742,7 @@ EXPORT_SYMBOL_GPL(tpm_pcr_read);
  * the module usage count.
  */
 #define TPM_ORD_PCR_EXTEND cpu_to_be32(20)
-#define EXTEND_PCR_SIZE 34
+#define EXTEND_PCR_RESULT_SIZE 34
 static struct tpm_input_header pcrextend_header = {
 	.tag = TPM_TAG_RQU_COMMAND,
 	.length = cpu_to_be32(34),
@@ -760,10 +760,9 @@ int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash)
 		return -ENODEV;
 
 	cmd.header.in = pcrextend_header;
-	BUG_ON(be32_to_cpu(cmd.header.in.length) > EXTEND_PCR_SIZE);
 	cmd.params.pcrextend_in.pcr_idx = cpu_to_be32(pcr_idx);
 	memcpy(cmd.params.pcrextend_in.hash, hash, TPM_DIGEST_SIZE);
-	rc = transmit_cmd(chip, &cmd, cmd.header.in.length,
+	rc = transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE,
 			  "attempting extend a PCR value");
 
 	module_put(chip->dev->driver->owner);