| commit | 6100dda70d84be83d131c3b35cb9c00f7b07db15 | |
| author | Alexey Kardashevskiy <aik@ozlabs.ru> | |
| Mon, 11 Sep 2017 06:56:06 +0000 (11 16:56 +1000) | ||
| committer | Gerd Hoffmann <kraxel@redhat.com> | |
| Wed, 13 Sep 2017 08:41:39 +0000 (13 10:41 +0200) | ||
| tree | 5749e849bdb788e720fd241954c4b6abc162e2ae | treesnapshot (tar.gz zip) |
| parent | 619c200f6ce2f44fbc8a5732174530c3b4782aab | commitdiff |
xhci: Avoid DMA when ERSTBA is set to zero
The existing XHCI code reads the Event Ring Segment Table Base Address
Register (ERSTBA) every time when it is changed. However zero is its
default state so one would think that zero there means it is not in use.
This adds a check for ERSTBA in addition to the existing check for
the Event Ring Segment Table Size Register (ERSTSZ).
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Message-id: 20170911065606.40600-1-aik@ozlabs.ru
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
The existing XHCI code reads the Event Ring Segment Table Base Address
Register (ERSTBA) every time when it is changed. However zero is its
default state so one would think that zero there means it is not in use.
This adds a check for ERSTBA in addition to the existing check for
the Event Ring Segment Table Size Register (ERSTSZ).
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Message-id: 20170911065606.40600-1-aik@ozlabs.ru
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
| hw/usb/hcd-xhci.c | diffblobblamehistory |