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authorDmitry Osipenko2017-08-16 13:32:39 +0300
committerPeter Chen2017-08-24 17:40:42 +0800
commit581821ae7f7e2c4547945c65f1bcd357f5915aa5 (patch)
tree0d41d8f23c0563c15b8374100ec85895afe743c4 /drivers/usb
parent7c3a8b81503ce8e6ab22341f0267d30085d17194 (diff)
usb: chipidea: udc: Support SKB alignment quirk
NVIDIA Tegra20 UDC can't cope with unaligned DMA and require a USB gadget quirk that avoids SKB buffer alignment to be set in order to make Ethernet Gadget working. Later Tegra generations do not require that quirk. Let's add a new platform data flag that allows to enable USB gadget quirk for platforms that require it. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Peter Chen <peter.chen@nxp.com>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/chipidea/udc.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 6502c13331e8..fe8a90543ea3 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1896,6 +1896,9 @@ static int udc_start(struct ci_hdrc *ci)
ci->gadget.name = ci->platdata->name;
ci->gadget.otg_caps = otg_caps;
+ if (ci->platdata->flags & CI_HDRC_REQUIRES_ALIGNED_DMA)
+ ci->gadget.quirk_avoids_skb_reserve = 1;
+
if (ci->is_otg && (otg_caps->hnp_support || otg_caps->srp_support ||
otg_caps->adp_support))
ci->gadget.is_otg = 1;