This is a note to let you know that I've just added the patch titled
vTPM: fix memory allocation flag for rtce buffer at kernel boot
to the 4.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
vtpm-fix-memory-allocation-flag-for-rtce-buffer-at-kernel-boot.patch
and it can be found in the queue-4.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 60ecd86c4d985750efa0ea3d8610972b09951715 Mon Sep 17 00:00:00 2001
From: "Hon Ching \\(Vicky\\) Lo" <honclo@xxxxxxxxxxxxxxxxxx>
Date: Wed, 7 Oct 2015 20:11:51 -0400
Subject: vTPM: fix memory allocation flag for rtce buffer at kernel boot
From: Hon Ching \(Vicky\) Lo <honclo@xxxxxxxxxxxxxxxxxx>
commit 60ecd86c4d985750efa0ea3d8610972b09951715 upstream.
At ibm vtpm initialzation, tpm_ibmvtpm_probe() registers its interrupt
handler, ibmvtpm_interrupt, which calls ibmvtpm_crq_process to allocate
memory for rtce buffer. The current code uses 'GFP_KERNEL' as the
type of kernel memory allocation, which resulted a warning at
kernel/lockdep.c. This patch uses 'GFP_ATOMIC' instead so that the
allocation is high-priority and does not sleep.
Signed-off-by: Hon Ching(Vicky) Lo <honclo@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Peter Huewe <peterhuewe@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/char/tpm/tpm_ibmvtpm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/char/tpm/tpm_ibmvtpm.c
+++ b/drivers/char/tpm/tpm_ibmvtpm.c
@@ -491,7 +491,7 @@ static void ibmvtpm_crq_process(struct i
}
ibmvtpm->rtce_size = be16_to_cpu(crq->len);
ibmvtpm->rtce_buf = kmalloc(ibmvtpm->rtce_size,
- GFP_KERNEL);
+ GFP_ATOMIC);
if (!ibmvtpm->rtce_buf) {
dev_err(ibmvtpm->dev, "Failed to allocate memory for rtce buffer\n");
return;
Patches currently in stable-queue which might be from honclo@xxxxxxxxxxxxxxxxxx are
queue-4.3/vtpm-fix-memory-allocation-flag-for-rtce-buffer-at-kernel-boot.patch
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