[PATCH v1 06/10] tpm/tpm_i2c_stm_st33: Add status check when reading data on the FIFO
From: Christophe Ricard <hidden>
Date: 2015-01-10 11:20:27
Subsystem:
the rest, tpm device driver · Maintainers:
Linus Torvalds, Peter Huewe, Jarkko Sakkinen
Add a return value check when reading data from the FIFO register. Signed-off-by: Christophe Ricard <redacted> --- drivers/char/tpm/tpm_i2c_stm_st33.c | 7 +++++-- 1 file 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 3289f9d..eeb4816 100644
--- a/drivers/char/tpm/tpm_i2c_stm_st33.c
+++ b/drivers/char/tpm/tpm_i2c_stm_st33.c@@ -440,7 +440,7 @@ 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);
@@ -454,7 +454,10 @@ 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;
--
2.1.0
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