diff options
| author | Sanchayan Maity <maitysanchayan@gmail.com> | 2014-12-16 16:28:27 +0530 |
|---|---|---|
| committer | Stefan Agner <stefan.agner@toradex.com> | 2014-12-18 17:37:38 +0100 |
| commit | 068ecdab500e551f313cd6b08dccc32c9d55e137 (patch) | |
| tree | da386c84606c84b16d41a4c85334666688a25be6 | |
| parent | d131b771ee18ebb5330e97e83ba9740d6f421e2b (diff) | |
u_ether: Fix usb client usage with gadget ethernet
Currently the Vybrid USB client does not work reliably
with usb gadget ethernet. This patch forces usage of
only a single transfer descriptor for the dTD list which
seems to work reliably well for now. Does not fix the
underlying issue and is only temporary.
Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
| -rw-r--r-- | drivers/usb/gadget/function/u_ether.c | 5 | ||||
| -rw-r--r-- | drivers/usb/gadget/function/u_ether.h | 5 |
2 files changed, 8 insertions, 2 deletions
diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c index 6e6f87656e7b..e1a1ea8b41d2 100644 --- a/drivers/usb/gadget/function/u_ether.c +++ b/drivers/usb/gadget/function/u_ether.c @@ -85,7 +85,10 @@ struct eth_dev { #define RX_EXTRA 20 /* bytes guarding against rx overflows */ -#define DEFAULT_QLEN 2 /* double buffering by default */ +/* Default value is 2 for double buffering. Change it to 1 as + * as a temporary fix for the USB client issue in Vybrid. + */ +#define DEFAULT_QLEN 1 /* double buffering by default */ /* for dual-speed hardware, use deeper queues at high/super speed */ static inline int qlen(struct usb_gadget *gadget, unsigned qmult) diff --git a/drivers/usb/gadget/function/u_ether.h b/drivers/usb/gadget/function/u_ether.h index 334b38947916..936e7273efe0 100644 --- a/drivers/usb/gadget/function/u_ether.h +++ b/drivers/usb/gadget/function/u_ether.h @@ -22,7 +22,10 @@ #include "gadget_chips.h" -#define QMULT_DEFAULT 5 +/* Default value is 1. Change it to 1 as a temporary fix for the + * USB client issue in Vybrid. + */ +#define QMULT_DEFAULT 1 /* * dev_addr: initial value |