From a927b8131794ee449b7f6666e7ab61301949b20f Mon Sep 17 00:00:00 2001 From: Stefan Berger Date: Fri, 11 Nov 2011 12:57:06 -0500 Subject: tpm_tis: add delay after aborting command 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 --- drivers/char/tpm/tpm_tis.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/char') diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c index 34832bc7..d93bafd 100644 --- a/drivers/char/tpm/tpm_tis.c +++ b/drivers/char/tpm/tpm_tis.c @@ -432,6 +432,9 @@ static int probe_itpm(struct tpm_chip *chip) out: itpm = rem_itpm; tpm_tis_ready(chip); + /* 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; -- cgit v1.1