[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Bug#649033: Fix kernel boot delay due to hang in tpm_tis

Can someone who experiences the delay during the boot please apply the
patch below? Please let me know whether it solves the problem.

This patch adds a delay after aborting a command. Some TPMs need
this and will not process the subsequent command correctly otherwise.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>

 drivers/char/tpm/tpm_tis.c |    3 +++
 1 file changed, 3 insertions(+)

Index: linux-2.6/drivers/char/tpm/tpm_tis.c
--- linux-2.6.orig/drivers/char/tpm/tpm_tis.c
+++ linux-2.6/drivers/char/tpm/tpm_tis.c
@@ -432,6 +432,9 @@ static int probe_itpm(struct tpm_chip *c
 	itpm = rem_itpm;
+	/* some TPMs need a break here otherwise they will not work
+	 * correctly on the immediately subsequent command */
+	msleep(chip->vendor.timeout_b);
 	release_locality(chip, chip->vendor.locality, 0);
 	return rc;

Reply to: