* [PATCH v2] tpm: vtpm_proxy: Suppresse error logging when in closed state @ 2017-05-25 21:39 Stefan Berger [not found] ` <1495748360-26558-1-git-send-email-stefanb-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org> 0 siblings, 1 reply; 3+ messages in thread From: Stefan Berger @ 2017-05-25 21:39 UTC (permalink / raw) To: jarkko.sakkinen, tpmdd-devel Cc: linux-security-module, linux-kernel, jgunthorpe, Stefan Berger Suppress the error logging when the core TPM driver sends commands to the VTPM proxy driver and -EPIPE is returned in case the VTPM proxy driver is 'closed' (closed anonymous file descriptor). This error code is only returned by the send function and by tpm_transmit when the VTPM proxy driver is being used. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> --- drivers/char/tpm/tpm-interface.c | 4 ++-- drivers/char/tpm/tpm2-cmd.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index d711186..4826fcf 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -429,11 +429,11 @@ ssize_t tpm_transmit(struct tpm_chip *chip, struct tpm_space *space, goto out; rc = chip->ops->send(chip, (u8 *) buf, count); - if (rc < 0) { + if (rc < 0 && rc != -EPIPE) dev_err(&chip->dev, "tpm_transmit: tpm_send: error %d\n", rc); + if (rc < 0) goto out; - } if (chip->flags & TPM_CHIP_FLAG_IRQ) goto out_recv; diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 3ee6883..3a99643 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -840,7 +840,7 @@ void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type) /* In places where shutdown command is sent there's no much we can do * except print the error code on a system failure. */ - if (rc < 0) + if (rc < 0 && rc != -EPIPE) dev_warn(&chip->dev, "transmit returned %d while stopping the TPM", rc); } -- 2.4.3 ^ permalink raw reply related [flat|nested] 3+ messages in thread
[parent not found: <1495748360-26558-1-git-send-email-stefanb-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>]
* Re: [PATCH v2] tpm: vtpm_proxy: Suppresse error logging when in closed state [not found] ` <1495748360-26558-1-git-send-email-stefanb-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org> @ 2017-05-25 21:53 ` Joe Perches 2017-05-25 22:35 ` Jarkko Sakkinen 1 sibling, 0 replies; 3+ messages in thread From: Joe Perches @ 2017-05-25 21:53 UTC (permalink / raw) To: Stefan Berger, jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA, tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f Cc: linux-security-module-u79uwXL29TY76Z2rM5mHXA, linux-kernel-u79uwXL29TY76Z2rM5mHXA On Thu, 2017-05-25 at 17:39 -0400, Stefan Berger wrote: > Suppress the error logging when the core TPM driver sends commands > to the VTPM proxy driver and -EPIPE is returned in case the VTPM > proxy driver is 'closed' (closed anonymous file descriptor). This > error code is only returned by the send function and by tpm_transmit > when the VTPM proxy driver is being used. > > Signed-off-by: Stefan Berger <stefanb-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org> > --- > drivers/char/tpm/tpm-interface.c | 4 ++-- > drivers/char/tpm/tpm2-cmd.c | 2 +- > 2 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c > index d711186..4826fcf 100644 > --- a/drivers/char/tpm/tpm-interface.c > +++ b/drivers/char/tpm/tpm-interface.c > @@ -429,11 +429,11 @@ ssize_t tpm_transmit(struct tpm_chip *chip, struct tpm_space *space, > goto out; > > rc = chip->ops->send(chip, (u8 *) buf, count); > - if (rc < 0) { > + if (rc < 0 && rc != -EPIPE) > dev_err(&chip->dev, > "tpm_transmit: tpm_send: error %d\n", rc); > + if (rc < 0) > goto out; Perhaps this would read better as if (rc < 0) { if (rc != -EPIPE) dev_err(etc...); goto out; } though for etc, perhaps dev_err(&chip->dev, "%s: %tpm_send: error %d\n", __func__, rc); ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2] tpm: vtpm_proxy: Suppresse error logging when in closed state [not found] ` <1495748360-26558-1-git-send-email-stefanb-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org> 2017-05-25 21:53 ` Joe Perches @ 2017-05-25 22:35 ` Jarkko Sakkinen 1 sibling, 0 replies; 3+ messages in thread From: Jarkko Sakkinen @ 2017-05-25 22:35 UTC (permalink / raw) To: Stefan Berger Cc: linux-security-module-u79uwXL29TY76Z2rM5mHXA, tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f, linux-kernel-u79uwXL29TY76Z2rM5mHXA On Thu, May 25, 2017 at 05:39:20PM -0400, Stefan Berger wrote: > Suppress the error logging when the core TPM driver sends commands > to the VTPM proxy driver and -EPIPE is returned in case the VTPM > proxy driver is 'closed' (closed anonymous file descriptor). This > error code is only returned by the send function and by tpm_transmit > when the VTPM proxy driver is being used. > > Signed-off-by: Stefan Berger <stefanb-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org> This have to hold up until some time next week as I have to make sure that I understand that this is the right choice, which requirest to study vtpm implementation. I'm travelling right now. /Jarkko > --- > drivers/char/tpm/tpm-interface.c | 4 ++-- > drivers/char/tpm/tpm2-cmd.c | 2 +- > 2 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c > index d711186..4826fcf 100644 > --- a/drivers/char/tpm/tpm-interface.c > +++ b/drivers/char/tpm/tpm-interface.c > @@ -429,11 +429,11 @@ ssize_t tpm_transmit(struct tpm_chip *chip, struct tpm_space *space, > goto out; > > rc = chip->ops->send(chip, (u8 *) buf, count); > - if (rc < 0) { > + if (rc < 0 && rc != -EPIPE) > dev_err(&chip->dev, > "tpm_transmit: tpm_send: error %d\n", rc); > + if (rc < 0) > goto out; > - } > > if (chip->flags & TPM_CHIP_FLAG_IRQ) > goto out_recv; > diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c > index 3ee6883..3a99643 100644 > --- a/drivers/char/tpm/tpm2-cmd.c > +++ b/drivers/char/tpm/tpm2-cmd.c > @@ -840,7 +840,7 @@ void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type) > /* In places where shutdown command is sent there's no much we can do > * except print the error code on a system failure. > */ > - if (rc < 0) > + if (rc < 0 && rc != -EPIPE) > dev_warn(&chip->dev, "transmit returned %d while stopping the TPM", > rc); > } > -- > 2.4.3 > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2017-05-25 22:35 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2017-05-25 21:39 [PATCH v2] tpm: vtpm_proxy: Suppresse error logging when in closed state Stefan Berger [not found] ` <1495748360-26558-1-git-send-email-stefanb-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org> 2017-05-25 21:53 ` Joe Perches 2017-05-25 22:35 ` Jarkko Sakkinen
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