diff options
| author | Hon Ching \(Vicky\) Lo <honclo@linux.vnet.ibm.com> | 2015-10-08 03:11:51 +0300 |
|---|---|---|
| committer | Peter Huewe <peterhuewe@gmx.de> | 2015-10-19 02:00:49 +0300 |
| commit | 60ecd86c4d985750efa0ea3d8610972b09951715 (patch) | |
| tree | e77cc93d980046a77258d13944ac191d38dec6eb | |
| parent | eb6301160dde0227ac27c6ec2a0b57054d88e398 (diff) | |
| download | linux-60ecd86c4d985750efa0ea3d8610972b09951715.tar.xz | |
vTPM: fix memory allocation flag for rtce buffer at kernel boot
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.
Cc: stable@kernel.org
Signed-off-by: Hon Ching(Vicky) Lo <honclo@linux.vnet.ibm.com>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
| -rw-r--r-- | drivers/char/tpm/tpm_ibmvtpm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/tpm/tpm_ibmvtpm.c b/drivers/char/tpm/tpm_ibmvtpm.c index 27ebf9511cb4..3e6a22658b63 100644 --- a/drivers/char/tpm/tpm_ibmvtpm.c +++ b/drivers/char/tpm/tpm_ibmvtpm.c @@ -491,7 +491,7 @@ static void ibmvtpm_crq_process(struct ibmvtpm_crq *crq, } 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; |