diff options
| author | Hon Ching \(Vicky\) Lo <honclo@linux.vnet.ibm.com> | 2015-10-07 20:11:51 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-17 12:34:35 -0800 |
| commit | 2060578571caa130c8483a10fbc4292da6082009 (patch) | |
| tree | 96b9d736a98ae8c2f1f54eaa563d4a13af9676ad | |
| parent | 38a2d8100b2290d6b1328a78ea5db41d4946b3b4 (diff) | |
| download | lwn-2060578571caa130c8483a10fbc4292da6082009.tar.gz lwn-2060578571caa130c8483a10fbc4292da6082009.zip | |
vTPM: fix memory allocation flag for rtce buffer at kernel boot
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@linux.vnet.ibm.com>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 643bba7d6f81..9eab751efeea 100644 --- a/drivers/char/tpm/tpm_ibmvtpm.c +++ b/drivers/char/tpm/tpm_ibmvtpm.c @@ -490,7 +490,7 @@ 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; |