[PATCH 3.13.y-ckt 027/143] TPM: Add new TPMs to the tail of the list to prevent inadvertent change of dev
Kamal Mostafa
kamal at canonical.com
Tue Mar 31 19:46:32 UTC 2015
3.13.11-ckt18 -stable review patch. If anyone has any objections, please let me know.
------------------
From: David Howells <dhowells at redhat.com>
commit 398a1e71dc827b994b7f2f56c7c2186fea7f8d75 upstream.
Add newly registered TPMs to the tail of the list, not the beginning, so that
things that are specifying TPM_ANY_NUM don't find that the device they're
using has inadvertently changed. Adding a second device would break IMA, for
instance.
Signed-off-by: David Howells <dhowells at redhat.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe at obsidianresearch.com>
Signed-off-by: Peter Huewe <peterhuewe at gmx.de>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
drivers/char/tpm/tpm-interface.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 901b370..5ad180b 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -1536,7 +1536,7 @@ struct tpm_chip *tpm_register_hardware(struct device *dev,
/* Make chip available */
spin_lock(&driver_lock);
- list_add_rcu(&chip->list, &tpm_chip_list);
+ list_add_tail_rcu(&chip->list, &tpm_chip_list);
spin_unlock(&driver_lock);
return chip;
--
1.9.1
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