diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2017-03-27 17:25:06 -0500 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2017-04-03 05:31:53 +0200 |
| commit | 5cf1fadeca706f8d3016ea44c3e482c2428d6b3f (patch) | |
| tree | 636f447682afa614186452ee8b21f71bd7f65b75 | |
| parent | 45a0dbc95c1ef1d697598655a526709f27151bb4 (diff) | |
drivers/spi/tpm: de-assert chip select on transaction error
In the case of start_transaction() failing the chip select is never
deasserted. Correct that by deasserting the chip select when
start_transaction() fails.
BUG=b:36598499
Change-Id: I2c5200085eb357259edab39c1a0fa7b1d81ba7b2
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/19056
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
| -rw-r--r-- | src/drivers/spi/tpm/tpm.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/drivers/spi/tpm/tpm.c b/src/drivers/spi/tpm/tpm.c index b2bda8c928..e3faff09d1 100644 --- a/src/drivers/spi/tpm/tpm.c +++ b/src/drivers/spi/tpm/tpm.c @@ -171,6 +171,7 @@ static int start_transaction(int read_write, size_t bytes, unsigned addr) do { if (stopwatch_expired(&sw)) { printk(BIOS_ERR, "TPM flow control failure\n"); + tpm_if.cs_deassert(&tpm_if.slave); return 0; } tpm_if.xfer(&tpm_if.slave, NULL, 0, &byte, 1); |