diff options
| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2016-08-22 11:48:26 +0300 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-08-31 10:06:03 +0300 |
| commit | 05f6b0ff68429bb7c6b84b35e71b522c3bae76ae (patch) | |
| tree | 3d59d92dd7c41eb935be159835e2b09e84210dfc /drivers/usb/gadget | |
| parent | 60e7396f820fa67a007f2a2eb5d97d3e77a74881 (diff) | |
| download | linux-05f6b0ff68429bb7c6b84b35e71b522c3bae76ae.tar.xz | |
usb: gadget: u_ether: add a flag to avoid skb_reserve() calling
This patch adds a flag "no_skb_reserve" in struct eth_dev.
So, if a peripheral driver sets the quirk_avoids_skb_reserve flag,
upper network gadget drivers (e.g. f_ncm.c) can avoid skb_reserve()
calling using the flag as well.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/gadget')
| -rw-r--r-- | drivers/usb/gadget/function/u_ether.c | 5 | ||||
| -rw-r--r-- | drivers/usb/gadget/function/u_ether.h | 1 |
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c index 5f562c1ec795..3be4b93fd415 100644 --- a/drivers/usb/gadget/function/u_ether.c +++ b/drivers/usb/gadget/function/u_ether.c @@ -82,6 +82,7 @@ struct eth_dev { #define WORK_RX_MEMORY 0 bool zlp; + bool no_skb_reserve; u8 host_mac[ETH_ALEN]; u8 dev_mac[ETH_ALEN]; }; @@ -233,7 +234,8 @@ rx_submit(struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags) * but on at least one, checksumming fails otherwise. Note: * RNDIS headers involve variable numbers of LE32 values. */ - skb_reserve(skb, NET_IP_ALIGN); + if (likely(!dev->no_skb_reserve)) + skb_reserve(skb, NET_IP_ALIGN); req->buf = skb->data; req->length = size; @@ -1063,6 +1065,7 @@ struct net_device *gether_connect(struct gether *link) if (result == 0) { dev->zlp = link->is_zlp_ok; + dev->no_skb_reserve = link->no_skb_reserve; DBG(dev, "qlen %d\n", qlen(dev->gadget, dev->qmult)); dev->header_len = link->header_len; diff --git a/drivers/usb/gadget/function/u_ether.h b/drivers/usb/gadget/function/u_ether.h index c77145bd6b5b..81d94a7ae4b4 100644 --- a/drivers/usb/gadget/function/u_ether.h +++ b/drivers/usb/gadget/function/u_ether.h @@ -64,6 +64,7 @@ struct gether { struct usb_ep *out_ep; bool is_zlp_ok; + bool no_skb_reserve; u16 cdc_filter; |