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| author | Christophe Ricard <christophe.ricard@gmail.com> | 2015-01-13 23:13:14 +0100 |
|---|---|---|
| committer | Peter Huewe <peterhuewe@gmx.de> | 2015-01-17 15:03:50 +0100 |
| commit | c4eadfafb91d5501095c55ffadaa1168743f39d3 (patch) | |
| tree | 42c41981e13588f42c8b02a553a3a4c1bfa6d20f /drivers/char | |
| parent | tpm: TPM 2.0 FIFO Interface (diff) | |
| download | linux-c4eadfafb91d5501095c55ffadaa1168743f39d3.tar.xz linux-c4eadfafb91d5501095c55ffadaa1168743f39d3.zip | |
tpm/tpm_i2c_stm_st33: Add status check when reading data on the FIFO
Add a return value check when reading data from the FIFO register.
Cc: <stable@vger.kernel.org>
Reviewed-by: Jason Gunthorpe <jason.gunthorpe@obsidianresearch.com>
Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm_i2c_stm_st33.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c index 48c4808d5a7a..4f70296f3a7f 100644 --- a/drivers/char/tpm/tpm_i2c_stm_st33.c +++ b/drivers/char/tpm/tpm_i2c_stm_st33.c @@ -441,7 +441,7 @@ again: */ static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count) { - int size = 0, burstcnt, len; + int size = 0, burstcnt, len, ret; struct tpm_stm_dev *tpm_dev; tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip); @@ -455,7 +455,10 @@ static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count) if (burstcnt < 0) return burstcnt; len = min_t(int, burstcnt, count - size); - I2C_READ_DATA(tpm_dev, TPM_DATA_FIFO, buf + size, len); + ret = I2C_READ_DATA(tpm_dev, TPM_DATA_FIFO, buf + size, len); + if (ret < 0) + return ret; + size += len; } return size; |