Revert "tpm_tis: Use timeouts returned from TPM"

This reverts commit 9b29050f8f75916f974a2d231ae5d3cd59792296.

It has caused hibernate regressions, for example Juri Sladby's report:

  "I'm unable to hibernate 2.6.37.1 unless I rmmod tpm_tis:
   [10974.074587] Suspending console(s) (use no_console_suspend to debug)
   [10974.103073] tpm_tis 00:0c: Operation Timed out
   [10974.103089] legacy_suspend(): pnp_bus_suspend+0x0/0xa0 returns -62
   [10974.103095] PM: Device 00:0c failed to freeze: error -62"

and Rafael points out that some of the new conditionals in that commit
seem to make no sense.  This commit needs more work and testing, let's
revert it for now.

Reported-by: Norbert Preining <preining@logic.at>
Reported-and-requested-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Stefan Berger <stefanb@linux.vnet.ibm.com>
Cc: Guillaume Chazarain <guichaz@gmail.com>
Cc: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index faf5a2c659262aeea3d419142b78d32deac721a9..36e0fa161c2bf0b46206a6e0af00698935ad158b 100644 (file)
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -577,11 +577,9 @@ duration:
        if (rc)
                return;
 
-       if (be32_to_cpu(tpm_cmd.header.out.return_code) != 0 ||
-           be32_to_cpu(tpm_cmd.header.out.length)
-           != sizeof(tpm_cmd.header.out) + sizeof(u32) + 3 * sizeof(u32))
+       if (be32_to_cpu(tpm_cmd.header.out.return_code)
+           != 3 * sizeof(u32))
                return;
-
        duration_cap = &tpm_cmd.params.getcap_out.cap.duration;
        chip->vendor.duration[TPM_SHORT] =
            usecs_to_jiffies(be32_to_cpu(duration_cap->tpm_short));
@@ -941,18 +939,6 @@ ssize_t tpm_show_caps_1_2(struct device * dev,
 }
 EXPORT_SYMBOL_GPL(tpm_show_caps_1_2);
 
-ssize_t tpm_show_timeouts(struct device *dev, struct device_attribute *attr,
-                         char *buf)
-{
-       struct tpm_chip *chip = dev_get_drvdata(dev);
-
-       return sprintf(buf, "%d %d %d\n",
-                      jiffies_to_usecs(chip->vendor.duration[TPM_SHORT]),
-                      jiffies_to_usecs(chip->vendor.duration[TPM_MEDIUM]),
-                      jiffies_to_usecs(chip->vendor.duration[TPM_LONG]));
-}
-EXPORT_SYMBOL_GPL(tpm_show_timeouts);
-
 ssize_t tpm_store_cancel(struct device *dev, struct device_attribute *attr,
                        const char *buf, size_t count)
 {

diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index d84ff772c26f7ccde9fbdcb2720f8c20e025d1ed..72ddb031b69a24e425a22d5892283b91f6cc1eec 100644 (file)
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -56,8 +56,6 @@ extern ssize_t tpm_show_owned(struct device *, struct device_attribute *attr,
                                char *);
 extern ssize_t tpm_show_temp_deactivated(struct device *,
                                         struct device_attribute *attr, char *);
-extern ssize_t tpm_show_timeouts(struct device *,
-                                struct device_attribute *attr, char *);
 
 struct tpm_chip;
 

diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 0d1d38e5f266137dc9c426abab641a769f054ddd..dd21df55689d96a39d5fea3f66d2161dfec44467 100644 (file)
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -376,7 +376,6 @@ static DEVICE_ATTR(temp_deactivated, S_IRUGO, tpm_show_temp_deactivated,
                   NULL);
 static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps_1_2, NULL);
 static DEVICE_ATTR(cancel, S_IWUSR | S_IWGRP, NULL, tpm_store_cancel);
-static DEVICE_ATTR(timeouts, S_IRUGO, tpm_show_timeouts, NULL);
 
 static struct attribute *tis_attrs[] = {
        &dev_attr_pubek.attr,
@@ -386,8 +385,7 @@ static struct attribute *tis_attrs[] = {
        &dev_attr_owned.attr,
        &dev_attr_temp_deactivated.attr,
        &dev_attr_caps.attr,
-       &dev_attr_cancel.attr,
-       &dev_attr_timeouts.attr, NULL,
+       &dev_attr_cancel.attr, NULL,
 };
 
 static struct attribute_group tis_attr_grp = {