Commit 60ecd86c authored by Hon Ching \(Vicky\) Lo's avatar Hon Ching \(Vicky\) Lo Committed by Peter Huewe

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: default avatarHon Ching(Vicky) Lo <honclo@linux.vnet.ibm.com>
Signed-off-by: default avatarPeter Huewe <peterhuewe@gmx.de>
parent eb630116
...@@ -491,7 +491,7 @@ static void ibmvtpm_crq_process(struct ibmvtpm_crq *crq, ...@@ -491,7 +491,7 @@ static void ibmvtpm_crq_process(struct ibmvtpm_crq *crq,
} }
ibmvtpm->rtce_size = be16_to_cpu(crq->len); ibmvtpm->rtce_size = be16_to_cpu(crq->len);
ibmvtpm->rtce_buf = kmalloc(ibmvtpm->rtce_size, ibmvtpm->rtce_buf = kmalloc(ibmvtpm->rtce_size,
GFP_KERNEL); GFP_ATOMIC);
if (!ibmvtpm->rtce_buf) { if (!ibmvtpm->rtce_buf) {
dev_err(ibmvtpm->dev, "Failed to allocate memory for rtce buffer\n"); dev_err(ibmvtpm->dev, "Failed to allocate memory for rtce buffer\n");
return; return;
......
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