[PATCH 3.13.y-ckt 027/143] TPM: Add new TPMs to the tail of the list to prevent inadvertent change of dev

From: Kamal Mostafa
Date: Tue Mar 31 2015 - 16:27:05 EST


3.13.11-ckt18 -stable review patch. If anyone has any objections, please let me know.

------------------

From: David Howells <dhowells@xxxxxxxxxx>

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@xxxxxxxxxx>
Reviewed-by: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Peter Huewe <peterhuewe@xxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
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

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/