Messages in this thread Patch in this message | | | Date | Thu, 03 Jan 2008 21:44:15 +0100 | From | Marcel Selhorst <> | Subject | [PATCH] - TPM save state before suspending to ram |
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Dear list,
this patch fixes a bug, that prevents the TPM chip to resume correctly from a suspended state.
Signed-off-by: Marcel Selhorst <tpm@selhorst.net> --- --- linux-tpm/drivers/char/tpm/tpm.c 2008-01-03 20:44:43.000000000 +0100 +++ linux/drivers/char/tpm/tpm.c 2008-01-03 21:08:13.000000000 +0100 @@ -1041,7 +1041,7 @@ void tpm_remove_hardware(struct device * } EXPORT_SYMBOL_GPL(tpm_remove_hardware);
-static u8 savestate[] = { +static const u8 savestate[] = { 0, 193, /* TPM_TAG_RQU_COMMAND */ 0, 0, 0, 10, /* blob length (in bytes) */ 0, 0, 0, 152 /* TPM_ORD_SaveState */ @@ -1053,11 +1053,13 @@ static u8 savestate[] = { */ int tpm_pm_suspend(struct device *dev, pm_message_t pm_state) { + u8 data[max_t(int, max(ARRAY_SIZE(savestate), ARRAY_SIZE(savestate)), 10)]; struct tpm_chip *chip = dev_get_drvdata(dev); if (chip == NULL) return -ENODEV;
- tpm_transmit(chip, savestate, sizeof(savestate)); + memcpy(data, savestate, sizeof(savestate)); + tpm_transmit(chip, data, sizeof(data)); return 0; } EXPORT_SYMBOL_GPL(tpm_pm_suspend);
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