linux-kernel - [PATCH v2 1/3] vTPM: fix searching for the right vTPM node in device tree

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Message-Id: <1444263114-15081-2-git-send-email-honclo@linux.vnet.ibm.com>
Date:	Wed,  7 Oct 2015 20:11:52 -0400
From:	"Hon Ching(Vicky) Lo" <honclo@...ux.vnet.ibm.com>
To:	tpmdd-devel@...ts.sourceforge.net
Cc:	Peter Huewe <PeterHuewe@....de>, Ashley Lai <ashley@...leylai.com>,
	Mimi Zohar <zohar@...ux.vnet.ibm.com>,
	Vicky Lo <honclo2014@...il.com>, linux-kernel@...r.kernel.org,
	"Hon Ching(Vicky) Lo" <honclo@...ux.vnet.ibm.com>
Subject: [PATCH v2 1/3] vTPM: fix searching for the right vTPM node in device tree

Replace all occurrences of '/ibm,vtpm' with '/vdevice/vtpm',
as only the latter is ganranteed to be available for the client OS.
The '/ibm,vtpm' node should only be used by Open Firmware, which
is susceptible to changes.

Signed-off-by: Hon Ching(Vicky) Lo <honclo@...ux.vnet.ibm.com>
---
 arch/powerpc/kernel/prom_init.c |    8 ++++----
 drivers/char/tpm/tpm_of.c       |    2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 1a85d8f..b9b6bb1 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -1422,12 +1422,12 @@ static void __init prom_instantiate_sml(void)
 
 	prom_debug("prom_instantiate_sml: start...\n");
 
-	ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/ibm,vtpm"));
+	ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm"));
 	prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
 	if (!PHANDLE_VALID(ibmvtpm_node))
 		return;
 
-	ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/ibm,vtpm"));
+	ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm"));
 	if (!IHANDLE_VALID(ibmvtpm_inst)) {
 		prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
 		return;
@@ -1456,9 +1456,9 @@ static void __init prom_instantiate_sml(void)
 
 	reserve_mem(base, size);
 
-	prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-base",
+	prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base",
 		     &base, sizeof(base));
-	prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-size",
+	prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size",
 		     &size, sizeof(size));
 
 	prom_debug("sml base     = 0x%x\n", base);
diff --git a/drivers/char/tpm/tpm_of.c b/drivers/char/tpm/tpm_of.c
index 62a22ce..6c73199 100644
--- a/drivers/char/tpm/tpm_of.c
+++ b/drivers/char/tpm/tpm_of.c
@@ -31,7 +31,7 @@ int read_log(struct tpm_bios_log *log)
 		return -EFAULT;
 	}
 
-	np = of_find_node_by_name(NULL, "ibm,vtpm");
+	np = of_find_node_by_name(NULL, "vtpm");
 	if (!np) {
 		pr_err("%s: ERROR - IBMVTPM not supported\n", __func__);
 		return -ENODEV;
-- 
1.7.1

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