TPM: Fixup boot probe timeout for tpm_tis driver

When probing the device in tpm_tis_init the call request_locality
uses timeout_a, which wasn't being initalized until after
request_locality. This results in request_locality falsely timing
out if the chip is still starting. Move the initialization to before
request_locality.

This probably only matters for embedded cases (ie mine), a BIOS likely
gets the TPM into a state where this code path isn't necessary.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Acked-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>

diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index aec1931..0b73e4e 100644 (file)
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -450,6 +450,12 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
                goto out_err;
        }
 
+       /* Default timeouts */
+       chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
+       chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
+       chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
+       chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
+
        if (request_locality(chip, 0) != 0) {
                rc = -ENODEV;
                goto out_err;
@@ -457,12 +463,6 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
 
        vendor = ioread32(chip->vendor.iobase + TPM_DID_VID(0));
 
-       /* Default timeouts */
-       chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
-       chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
-       chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
-       chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
-
        dev_info(dev,
                 "1.2 TPM (device-id 0x%X, rev-id %d)\n",
                 vendor >> 16, ioread8(chip->vendor.iobase + TPM_RID(0)));