diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2012-06-19 16:23:32 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2012-07-09 09:57:46 +0200 |
| commit | a5e0139ab69feec9c9b8a4558369c283685e3f5a (patch) | |
| tree | 0327a078335ac2fb4d38388ebddb472317a86475 /hw | |
| parent | 84988cf910a6881f2180fdcec516b60f8f0dc8c4 (diff) | |
ehci: fix ehci_qh_do_overlay
Use ehci_flush_qh to make sure we touch inly the fields the hc is
allowed to touch.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/usb/hcd-ehci.c | 37 |
1 files changed, 18 insertions, 19 deletions
diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c index 1582c2c69e..7de47e5cf7 100644 --- a/hw/usb/hcd-ehci.c +++ b/hw/usb/hcd-ehci.c @@ -1246,6 +1246,23 @@ static inline int put_dwords(EHCIState *ehci, uint32_t addr, return 1; } +/* + * Write the qh back to guest physical memory. This step isn't + * in the EHCI spec but we need to do it since we don't share + * physical memory with our guest VM. + * + * The first three dwords are read-only for the EHCI, so skip them + * when writing back the qh. + */ +static void ehci_flush_qh(EHCIQueue *q) +{ + uint32_t *qh = (uint32_t *) &q->qh; + uint32_t dwords = sizeof(EHCIqh) >> 2; + uint32_t addr = NLPTR_GET(q->qhaddr); + + put_dwords(q->ehci, addr + 3 * sizeof(uint32_t), qh + 3, dwords - 3); +} + // 4.10.2 static int ehci_qh_do_overlay(EHCIQueue *q) @@ -1293,8 +1310,7 @@ static int ehci_qh_do_overlay(EHCIQueue *q) q->qh.bufptr[1] &= ~BUFPTR_CPROGMASK_MASK; q->qh.bufptr[2] &= ~BUFPTR_FRAMETAG_MASK; - put_dwords(q->ehci, NLPTR_GET(q->qhaddr), (uint32_t *) &q->qh, - sizeof(EHCIqh) >> 2); + ehci_flush_qh(q); return 0; } @@ -1600,23 +1616,6 @@ static int ehci_process_itd(EHCIState *ehci, } -/* - * Write the qh back to guest physical memory. This step isn't - * in the EHCI spec but we need to do it since we don't share - * physical memory with our guest VM. - * - * The first three dwords are read-only for the EHCI, so skip them - * when writing back the qh. - */ -static void ehci_flush_qh(EHCIQueue *q) -{ - uint32_t *qh = (uint32_t *) &q->qh; - uint32_t dwords = sizeof(EHCIqh) >> 2; - uint32_t addr = NLPTR_GET(q->qhaddr); - - put_dwords(q->ehci, addr + 3 * sizeof(uint32_t), qh + 3, dwords - 3); -} - /* This state is the entry point for asynchronous schedule * processing. Entry here consitutes a EHCI start event state (4.8.5) */ |