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-rw-r--r--drivers/char/tpm/tpm_tis_core.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index 52e2dc7a9f81..1b350412d8a6 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -539,10 +539,17 @@ static int tpm_tis_send_main(struct tpm_chip *chip, const u8 *buf, size_t len)
int rc;
u32 ordinal;
unsigned long dur;
+ unsigned int try;
- rc = tpm_tis_send_data(chip, buf, len);
- if (rc < 0)
- return rc;
+ for (try = 0; try < TPM_RETRY; try++) {
+ rc = tpm_tis_send_data(chip, buf, len);
+ if (rc >= 0)
+ /* Data transfer done successfully */
+ break;
+ else if (rc != -EIO)
+ /* Data transfer failed, not recoverable */
+ return rc;
+ }
/* go and do it */
rc = tpm_tis_write8(priv, TPM_STS(priv->locality), TPM_STS_GO);