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-rw-r--r--drivers/char/tpm/tpm.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index 6b5a0e0127a7..aa899cec6b3f 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -557,6 +557,13 @@ duration:
usecs_to_jiffies(be32_to_cpu
(*((__be32 *) (data +
TPM_GET_CAP_RET_UINT32_1_IDX))));
+ /* The Broadcom BCM0102 chipset in a Dell Latitude D820 gets the above
+ * value wrong and apparently reports msecs rather than usecs. So we
+ * fix up the resulting too-small TPM_SHORT value to make things work.
+ */
+ if (chip->vendor.duration[TPM_SHORT] < (HZ/100))
+ chip->vendor.duration[TPM_SHORT] = HZ;
+
chip->vendor.duration[TPM_MEDIUM] =
usecs_to_jiffies(be32_to_cpu
(*((__be32 *) (data +