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[tpmdd-devel,3/7] tpm_tis: Get the timeouts early on

Message ID 1448485536-7282-4-git-send-email-jgunthorpe@obsidianresearch.com
State New
Headers show

Commit Message

Jason Gunthorpe Nov. 25, 2015, 9:05 p.m. UTC 
IRQ probing needs to know that the TPM is working before trying
to probe, so add a get_timeouts to the top of the function. This
has the advantage of also getting the correct timeouts loaded
before doing IRQ probing.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
---
 drivers/char/tpm/tpm_tis.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
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Patch

diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 2e6af3a53193..c07022a9c0d5 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -740,6 +740,16 @@  static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
 	if (intfcaps & TPM_INTF_DATA_AVAIL_INT)
 		dev_dbg(dev, "\tData Avail Int Support\n");
 
+	/* Very early on issue a command to the TPM in polling mode to make
+	 * sure it works. May as well use that command to set the proper
+	 *  timeouts for the driver.
+	 */
+	if (tpm_get_timeouts(chip)) {
+		dev_err(dev, "Could not get TPM timeouts and durations\n");
+		rc = -ENODEV;
+		goto out_err;
+	}
+
 	/* INTERRUPT Setup */
 	init_waitqueue_head(&chip->vendor.read_queue);
 	init_waitqueue_head(&chip->vendor.int_queue);