| Message ID | 20190208163059.640-2-jarkko.sakkinen@linux.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | tpm: Unify send() callbacks | expand |
On 2/8/19 11:30 AM, Jarkko Sakkinen wrote: > static void tpm_nsc_cancel(struct tpm_chip *chip) > diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c > index 60e2038652b8..1d781c19f112 100644 > --- a/drivers/char/tpm/tpm_tis_core.c > +++ b/drivers/char/tpm/tpm_tis_core.c > @@ -507,7 +507,11 @@ static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len) > if (!priv->irq_tested) > disable_interrupts(chip); > priv->irq_tested = true; > - return rc; > + > + if (rc < 0) > + return rc; > + > + return 0; > } That's not all... There's this above it as well with tpm_tis_send_main returning with 'return len;'. if (!(chip->flags & TPM_CHIP_FLAG_IRQ) || priv->irq_tested) return tpm_tis_send_main(chip, buf, len);
On 2/8/19 11:30 AM, Jarkko Sakkinen wrote:
> drivers/char/tpm/st33zp24/st33zp24.c | 2 +-
tpm_ibmvtpm.c needs an update of the description of the send function.
On Fri, Feb 08, 2019 at 11:36:19AM -0500, Stefan Berger wrote: > On 2/8/19 11:30 AM, Jarkko Sakkinen wrote: > > static void tpm_nsc_cancel(struct tpm_chip *chip) > > diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c > > index 60e2038652b8..1d781c19f112 100644 > > --- a/drivers/char/tpm/tpm_tis_core.c > > +++ b/drivers/char/tpm/tpm_tis_core.c > > @@ -507,7 +507,11 @@ static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len) > > if (!priv->irq_tested) > > disable_interrupts(chip); > > priv->irq_tested = true; > > - return rc; > > + > > + if (rc < 0) > > + return rc; > > + > > + return 0; > > } > > > That's not all... There's this above it as well with tpm_tis_send_main > returning with 'return len;'. > > if (!(chip->flags & TPM_CHIP_FLAG_IRQ) || priv->irq_tested) > return tpm_tis_send_main(chip, buf, len); OK, looks like that your suggestion to do it in *_main() was correct after all. /Jarkko
diff --git a/drivers/char/tpm/st33zp24/st33zp24.c b/drivers/char/tpm/st33zp24/st33zp24.c index 64dc560859f2..13dc614b7ebc 100644 --- a/drivers/char/tpm/st33zp24/st33zp24.c +++ b/drivers/char/tpm/st33zp24/st33zp24.c @@ -436,7 +436,7 @@ static int st33zp24_send(struct tpm_chip *chip, unsigned char *buf, goto out_err; } - return len; + return 0; out_err: st33zp24_cancel(chip); release_locality(chip); diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c index 66a14526aaf4..a290b30a0c35 100644 --- a/drivers/char/tpm/tpm_atmel.c +++ b/drivers/char/tpm/tpm_atmel.c @@ -105,7 +105,7 @@ static int tpm_atml_send(struct tpm_chip *chip, u8 *buf, size_t count) iowrite8(buf[i], priv->iobase); } - return count; + return 0; } static void tpm_atml_cancel(struct tpm_chip *chip) diff --git a/drivers/char/tpm/tpm_i2c_atmel.c b/drivers/char/tpm/tpm_i2c_atmel.c index 4720b2442ffe..aa11c8a1df5e 100644 --- a/drivers/char/tpm/tpm_i2c_atmel.c +++ b/drivers/char/tpm/tpm_i2c_atmel.c @@ -65,7 +65,11 @@ static int i2c_atmel_send(struct tpm_chip *chip, u8 *buf, size_t len) dev_dbg(&chip->dev, "%s(buf=%*ph len=%0zx) -> sts=%d\n", __func__, (int)min_t(size_t, 64, len), buf, len, status); - return status; + + if (status < 0) + return status; + + return 0; } static int i2c_atmel_recv(struct tpm_chip *chip, u8 *buf, size_t count) diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c index 3b490d9d90e7..3b4e9672ff6c 100644 --- a/drivers/char/tpm/tpm_i2c_infineon.c +++ b/drivers/char/tpm/tpm_i2c_infineon.c @@ -588,7 +588,7 @@ static int tpm_tis_i2c_send(struct tpm_chip *chip, u8 *buf, size_t len) /* go and do it */ iic_tpm_write(TPM_STS(tpm_dev.locality), &sts, 1); - return len; + return 0; out_err: tpm_tis_i2c_ready(chip); /* The TPM needs some time to clean up here, diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c index 5700cc2ddee1..315a3b4548f7 100644 --- a/drivers/char/tpm/tpm_i2c_nuvoton.c +++ b/drivers/char/tpm/tpm_i2c_nuvoton.c @@ -465,7 +465,7 @@ static int i2c_nuvoton_send(struct tpm_chip *chip, u8 *buf, size_t len) } dev_dbg(dev, "%s() -> %zd\n", __func__, len); - return len; + return 0; } static bool i2c_nuvoton_req_canceled(struct tpm_chip *chip, u8 status) diff --git a/drivers/char/tpm/tpm_ibmvtpm.c b/drivers/char/tpm/tpm_ibmvtpm.c index 07b5a487d0c8..aeae3222723c 100644 --- a/drivers/char/tpm/tpm_ibmvtpm.c +++ b/drivers/char/tpm/tpm_ibmvtpm.c @@ -192,7 +192,7 @@ static int tpm_ibmvtpm_send(struct tpm_chip *chip, u8 *buf, size_t count) rc = 0; ibmvtpm->tpm_processing_cmd = false; } else - rc = count; + rc = 0; spin_unlock(&ibmvtpm->rtce_lock); return rc; diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c index d8f10047fbba..97f6d4fe0aee 100644 --- a/drivers/char/tpm/tpm_infineon.c +++ b/drivers/char/tpm/tpm_infineon.c @@ -354,7 +354,7 @@ static int tpm_inf_send(struct tpm_chip *chip, u8 * buf, size_t count) for (i = 0; i < count; i++) { wait_and_send(chip, buf[i]); } - return count; + return 0; } static void tpm_inf_cancel(struct tpm_chip *chip) diff --git a/drivers/char/tpm/tpm_nsc.c b/drivers/char/tpm/tpm_nsc.c index 5d6cce74cd3f..9bee3c5eb4bf 100644 --- a/drivers/char/tpm/tpm_nsc.c +++ b/drivers/char/tpm/tpm_nsc.c @@ -226,7 +226,7 @@ static int tpm_nsc_send(struct tpm_chip *chip, u8 * buf, size_t count) } outb(NSC_COMMAND_EOC, priv->base + NSC_COMMAND); - return count; + return 0; } static void tpm_nsc_cancel(struct tpm_chip *chip) diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c index 60e2038652b8..1d781c19f112 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -507,7 +507,11 @@ static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len) if (!priv->irq_tested) disable_interrupts(chip); priv->irq_tested = true; - return rc; + + if (rc < 0) + return rc; + + return 0; } struct tis_vendor_timeout_override { diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c index 26a2be555288..d74f3de74ae6 100644 --- a/drivers/char/tpm/tpm_vtpm_proxy.c +++ b/drivers/char/tpm/tpm_vtpm_proxy.c @@ -335,7 +335,6 @@ static int vtpm_proxy_is_driver_command(struct tpm_chip *chip, static int vtpm_proxy_tpm_op_send(struct tpm_chip *chip, u8 *buf, size_t count) { struct proxy_dev *proxy_dev = dev_get_drvdata(&chip->dev); - int rc = 0; if (count > sizeof(proxy_dev->buffer)) { dev_err(&chip->dev, @@ -366,7 +365,7 @@ static int vtpm_proxy_tpm_op_send(struct tpm_chip *chip, u8 *buf, size_t count) wake_up_interruptible(&proxy_dev->wq); - return rc; + return 0; } static void vtpm_proxy_tpm_op_cancel(struct tpm_chip *chip) diff --git a/drivers/char/tpm/xen-tpmfront.c b/drivers/char/tpm/xen-tpmfront.c index 1259e935fd58..4e2d00cb0d81 100644 --- a/drivers/char/tpm/xen-tpmfront.c +++ b/drivers/char/tpm/xen-tpmfront.c @@ -173,7 +173,7 @@ static int vtpm_send(struct tpm_chip *chip, u8 *buf, size_t count) return -ETIME; } - return count; + return 0; } static int vtpm_recv(struct tpm_chip *chip, u8 *buf, size_t count)
The send() callback should never return length as it does not in every driver except tpm_crb in the success case. The reason is that the main transmit functionality only cares about whether the transmit was successful or not and ignores the count completely. Cc: stable@vger.kernel.org Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> --- drivers/char/tpm/st33zp24/st33zp24.c | 2 +- drivers/char/tpm/tpm_atmel.c | 2 +- drivers/char/tpm/tpm_i2c_atmel.c | 6 +++++- drivers/char/tpm/tpm_i2c_infineon.c | 2 +- drivers/char/tpm/tpm_i2c_nuvoton.c | 2 +- drivers/char/tpm/tpm_ibmvtpm.c | 2 +- drivers/char/tpm/tpm_infineon.c | 2 +- drivers/char/tpm/tpm_nsc.c | 2 +- drivers/char/tpm/tpm_tis_core.c | 6 +++++- drivers/char/tpm/tpm_vtpm_proxy.c | 3 +-- drivers/char/tpm/xen-tpmfront.c | 2 +- 11 files changed, 19 insertions(+), 12 deletions(-)