| Message ID | 20180228195819.22231-3-jarkko.sakkinen@linux.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Wed, Feb 28, 2018 at 09:58:15PM +0200, Jarkko Sakkinen wrote: > In order to make struct tpm_buf the first class object for constructing TPM > commands, migrate tpm2_shutdown() to use it. In addition, removed the klog > entry when tpm_transmit_cmd() fails because tpm_tansmit_cmd() already > prints an error message. > > Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> > drivers/char/tpm/tpm2-cmd.c | 41 +++++++++++++---------------------------- > 1 file changed, 13 insertions(+), 28 deletions(-) > > diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c > index 6eeff3a60003..5f92141b1e16 100644 > +++ b/drivers/char/tpm/tpm2-cmd.c > @@ -27,10 +27,6 @@ enum tpm2_session_attributes { > TPM2_SA_CONTINUE_SESSION = BIT(0), > }; > > -struct tpm2_startup_in { > - __be16 startup_type; > -} __packed; > - > struct tpm2_get_tpm_pt_in { > __be32 cap_id; > __be32 property_id; > @@ -55,7 +51,6 @@ struct tpm2_get_random_out { > } __packed; > > union tpm2_cmd_params { > - struct tpm2_startup_in startup_in; > struct tpm2_get_tpm_pt_in get_tpm_pt_in; > struct tpm2_get_tpm_pt_out get_tpm_pt_out; > struct tpm2_get_random_in getrandom_in; > @@ -760,40 +755,30 @@ ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id, u32 *value, > } > EXPORT_SYMBOL_GPL(tpm2_get_tpm_pt); > > -#define TPM2_SHUTDOWN_IN_SIZE \ > - (sizeof(struct tpm_input_header) + \ > - sizeof(struct tpm2_startup_in)) > - > -static const struct tpm_input_header tpm2_shutdown_header = { > - .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS), > - .length = cpu_to_be32(TPM2_SHUTDOWN_IN_SIZE), > - .ordinal = cpu_to_be32(TPM2_CC_SHUTDOWN) > -}; > - > /** > * tpm2_shutdown() - send shutdown command to the TPM chip > * > + * In places where shutdown command is sent there's no much we can do except > + * print the error code on a system failure. > + * > * @chip: TPM chip to use. > * @shutdown_type: shutdown type. The value is either > * TPM_SU_CLEAR or TPM_SU_STATE. > */ > void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type) > { > - struct tpm2_cmd cmd; > + struct tpm_buf buf; > int rc; > > - cmd.header.in = tpm2_shutdown_header; > - cmd.params.startup_in.startup_type = cpu_to_be16(shutdown_type); > - > - rc = tpm_transmit_cmd(chip, NULL, &cmd, sizeof(cmd), 0, 0, > - "stopping the TPM"); > - > - /* 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 && rc != -EPIPE) > - dev_warn(&chip->dev, "transmit returned %d while stopping the TPM", > - rc); > + rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_SHUTDOWN); > + if (rc) { > + dev_err(&chip->dev, "%s: out of memory", __func__); Don't print for out of memory. The kernel already makes lots of prints for you. Same comment everywhere. Jason -- To unsubscribe from this list: send the line "unsubscribe linux-security-module" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed, Feb 28, 2018 at 01:25:40PM -0700, Jason Gunthorpe wrote: > On Wed, Feb 28, 2018 at 09:58:15PM +0200, Jarkko Sakkinen wrote: > > In order to make struct tpm_buf the first class object for constructing TPM > > commands, migrate tpm2_shutdown() to use it. In addition, removed the klog > > entry when tpm_transmit_cmd() fails because tpm_tansmit_cmd() already > > prints an error message. > > > > Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> > > drivers/char/tpm/tpm2-cmd.c | 41 +++++++++++++---------------------------- > > 1 file changed, 13 insertions(+), 28 deletions(-) > > > > diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c > > index 6eeff3a60003..5f92141b1e16 100644 > > +++ b/drivers/char/tpm/tpm2-cmd.c > > @@ -27,10 +27,6 @@ enum tpm2_session_attributes { > > TPM2_SA_CONTINUE_SESSION = BIT(0), > > }; > > > > -struct tpm2_startup_in { > > - __be16 startup_type; > > -} __packed; > > - > > struct tpm2_get_tpm_pt_in { > > __be32 cap_id; > > __be32 property_id; > > @@ -55,7 +51,6 @@ struct tpm2_get_random_out { > > } __packed; > > > > union tpm2_cmd_params { > > - struct tpm2_startup_in startup_in; > > struct tpm2_get_tpm_pt_in get_tpm_pt_in; > > struct tpm2_get_tpm_pt_out get_tpm_pt_out; > > struct tpm2_get_random_in getrandom_in; > > @@ -760,40 +755,30 @@ ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id, u32 *value, > > } > > EXPORT_SYMBOL_GPL(tpm2_get_tpm_pt); > > > > -#define TPM2_SHUTDOWN_IN_SIZE \ > > - (sizeof(struct tpm_input_header) + \ > > - sizeof(struct tpm2_startup_in)) > > - > > -static const struct tpm_input_header tpm2_shutdown_header = { > > - .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS), > > - .length = cpu_to_be32(TPM2_SHUTDOWN_IN_SIZE), > > - .ordinal = cpu_to_be32(TPM2_CC_SHUTDOWN) > > -}; > > - > > /** > > * tpm2_shutdown() - send shutdown command to the TPM chip > > * > > + * In places where shutdown command is sent there's no much we can do except > > + * print the error code on a system failure. > > + * > > * @chip: TPM chip to use. > > * @shutdown_type: shutdown type. The value is either > > * TPM_SU_CLEAR or TPM_SU_STATE. > > */ > > void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type) > > { > > - struct tpm2_cmd cmd; > > + struct tpm_buf buf; > > int rc; > > > > - cmd.header.in = tpm2_shutdown_header; > > - cmd.params.startup_in.startup_type = cpu_to_be16(shutdown_type); > > - > > - rc = tpm_transmit_cmd(chip, NULL, &cmd, sizeof(cmd), 0, 0, > > - "stopping the TPM"); > > - > > - /* 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 && rc != -EPIPE) > > - dev_warn(&chip->dev, "transmit returned %d while stopping the TPM", > > - rc); > > + rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_SHUTDOWN); > > + if (rc) { > > + dev_err(&chip->dev, "%s: out of memory", __func__); > > Don't print for out of memory. The kernel already makes lots of > prints for you. Same comment everywhere. > > Jason I'll remove that. Thanks! /Jarkko -- To unsubscribe from this list: send the line "unsubscribe linux-security-module" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 6eeff3a60003..5f92141b1e16 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -27,10 +27,6 @@ enum tpm2_session_attributes { TPM2_SA_CONTINUE_SESSION = BIT(0), }; -struct tpm2_startup_in { - __be16 startup_type; -} __packed; - struct tpm2_get_tpm_pt_in { __be32 cap_id; __be32 property_id; @@ -55,7 +51,6 @@ struct tpm2_get_random_out { } __packed; union tpm2_cmd_params { - struct tpm2_startup_in startup_in; struct tpm2_get_tpm_pt_in get_tpm_pt_in; struct tpm2_get_tpm_pt_out get_tpm_pt_out; struct tpm2_get_random_in getrandom_in; @@ -760,40 +755,30 @@ ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id, u32 *value, } EXPORT_SYMBOL_GPL(tpm2_get_tpm_pt); -#define TPM2_SHUTDOWN_IN_SIZE \ - (sizeof(struct tpm_input_header) + \ - sizeof(struct tpm2_startup_in)) - -static const struct tpm_input_header tpm2_shutdown_header = { - .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS), - .length = cpu_to_be32(TPM2_SHUTDOWN_IN_SIZE), - .ordinal = cpu_to_be32(TPM2_CC_SHUTDOWN) -}; - /** * tpm2_shutdown() - send shutdown command to the TPM chip * + * In places where shutdown command is sent there's no much we can do except + * print the error code on a system failure. + * * @chip: TPM chip to use. * @shutdown_type: shutdown type. The value is either * TPM_SU_CLEAR or TPM_SU_STATE. */ void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type) { - struct tpm2_cmd cmd; + struct tpm_buf buf; int rc; - cmd.header.in = tpm2_shutdown_header; - cmd.params.startup_in.startup_type = cpu_to_be16(shutdown_type); - - rc = tpm_transmit_cmd(chip, NULL, &cmd, sizeof(cmd), 0, 0, - "stopping the TPM"); - - /* 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 && rc != -EPIPE) - dev_warn(&chip->dev, "transmit returned %d while stopping the TPM", - rc); + rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_SHUTDOWN); + if (rc) { + dev_err(&chip->dev, "%s: out of memory", __func__); + return; + } + tpm_buf_append_u16(&buf, shutdown_type); + tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE, 0, 0, + "stopping the TPM"); + tpm_buf_destroy(&buf); } /*
In order to make struct tpm_buf the first class object for constructing TPM commands, migrate tpm2_shutdown() to use it. In addition, removed the klog entry when tpm_transmit_cmd() fails because tpm_tansmit_cmd() already prints an error message. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> --- drivers/char/tpm/tpm2-cmd.c | 41 +++++++++++++---------------------------- 1 file changed, 13 insertions(+), 28 deletions(-)