[PATCH 15/16] tpm/tpm_i2c_stm_st33: Add delay before release_locality to make sure irq are cleared
From: Christophe Ricard <hidden>
Date: 2014-10-07 20:03:08
Subsystem:
the rest, tpm device driver · Maintainers:
Linus Torvalds, Peter Huewe, Jarkko Sakkinen
Possibly related (same subject, not in this thread)
- 2014-10-07 · [PATCH 15/16] tpm/tpm_i2c_stm_st33: Add delay before release_locality to make sure irq are cleared · Christophe Ricard <hidden>
In order to manage irq, locality must be active. As Status Ready interrupt is activated, when going back into ready state with the cancel function, we need to add a little delay to make sure the irq is going to be serviced before the release_locality is hit. Signed-off-by: Christophe Ricard <redacted> --- drivers/char/tpm/tpm_i2c_stm_st33.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c
index de9f12e..4c78845 100644
--- a/drivers/char/tpm/tpm_i2c_stm_st33.c
+++ b/drivers/char/tpm/tpm_i2c_stm_st33.c@@ -509,6 +509,7 @@ static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf, return len; out_err: tpm_stm_i2c_cancel(chip); + usleep_range(100, 250); release_locality(chip); return r; }
@@ -557,6 +558,7 @@ static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf, out: chip->ops->cancel(chip); + usleep_range(100, 250); release_locality(chip); return size; }
--
1.9.1
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