From: Keir Fraser Date: Tue, 8 Jan 2008 09:55:29 +0000 (+0000) Subject: xen vtpm: Initialize the comms ring with zeroes. X-Git-Tag: xen-3.2.0~21^2^2~18 X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=14451625450e76da8f4bb6155dc0ad6c305fff14;p=xenclient%2Fkernel.git xen vtpm: Initialize the comms ring with zeroes. Initialize the ring with zeroes on the backend side and on the frontend set the 'unused' member to zeroes. Signed-off-by: Stefan Berger --- diff --git a/drivers/char/tpm/tpm_xen.c b/drivers/char/tpm/tpm_xen.c index d6628335..a0ac5896 100644 --- a/drivers/char/tpm/tpm_xen.c +++ b/drivers/char/tpm/tpm_xen.c @@ -617,6 +617,7 @@ static int tpm_xmit(struct tpm_private *tp, tx = &tp->tx->ring[i].req; tx->addr = virt_to_machine(txb->data); tx->size = txb->len; + tx->unused = 0; DPRINTK("First 4 characters sent by TPM-FE are " "0x%02x 0x%02x 0x%02x 0x%02x\n", diff --git a/drivers/xen/tpmback/interface.c b/drivers/xen/tpmback/interface.c index 3ae227a0..604f69eb 100644 --- a/drivers/xen/tpmback/interface.c +++ b/drivers/xen/tpmback/interface.c @@ -126,6 +126,7 @@ int tpmif_map(tpmif_t *tpmif, unsigned long shared_page, unsigned int evtchn) } tpmif->tx = (tpmif_tx_interface_t *)tpmif->tx_area->addr; + memset(tpmif->tx, 0, PAGE_SIZE); err = bind_interdomain_evtchn_to_irqhandler( tpmif->domid, evtchn, tpmif_be_int, 0, tpmif->devname, tpmif);