diff options
| author | Pawel Laszczak <pawell@cadence.com> | 2024-09-05 07:03:28 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-09-11 15:38:25 +0200 |
| commit | e5fa8db0be3e8757e8641600c518425a4589b85c (patch) | |
| tree | 6211e96ef0218756f7fc3b80f7e134e3cb36af3a /drivers/usb/cdns3 | |
| parent | 118ecef16cc221a23f96617016f7a205b070109f (diff) | |
usb: xhci: fix loss of data on Cadence xHC
Streams should flush their TRB cache, re-read TRBs, and start executing
TRBs from the beginning of the new dequeue pointer after a 'Set TR Dequeue
Pointer' command.
Cadence controllers may fail to start from the beginning of the dequeue
TRB as it doesn't clear the Opaque 'RsvdO' field of the stream context
during 'Set TR Dequeue' command. This stream context area is where xHC
stores information about the last partially executed TD when a stream
is stopped. xHC uses this information to resume the transfer where it left
mid TD, when the stream is restarted.
Patch fixes this by clearing out all RsvdO fields before initializing new
Stream transfer using a 'Set TR Dequeue Pointer' command.
Fixes: 3d82904559f4 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver")
cc: stable@vger.kernel.org
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Reviewed-by: Peter Chen <peter.chen@kernel.org>
Link: https://lore.kernel.org/r/PH7PR07MB95386A40146E3EC64086F409DD9D2@PH7PR07MB9538.namprd07.prod.outlook.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/cdns3')
| -rw-r--r-- | drivers/usb/cdns3/host.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/usb/cdns3/host.c b/drivers/usb/cdns3/host.c index ceca4d839dfd..7ba760ee62e3 100644 --- a/drivers/usb/cdns3/host.c +++ b/drivers/usb/cdns3/host.c @@ -62,7 +62,9 @@ static const struct xhci_plat_priv xhci_plat_cdns3_xhci = { .resume_quirk = xhci_cdns3_resume_quirk, }; -static const struct xhci_plat_priv xhci_plat_cdnsp_xhci; +static const struct xhci_plat_priv xhci_plat_cdnsp_xhci = { + .quirks = XHCI_CDNS_SCTX_QUIRK, +}; static int __cdns_host_init(struct cdns *cdns) { |