diff options
| author | Mian Yousaf Kaukab <yousaf.kaukab@intel.com> | 2015-01-09 12:38:44 (GMT) |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-01-12 21:32:44 (GMT) |
| commit | 3f95001db7998c350422708a437694dda07bc04e (patch) | |
| tree | e8cabc0e6f5dfb919df5f761807cfc9eeaa0bcfe | |
| parent | b787d75503fb6f68aea5220ca23bb0c02d14ae74 (diff) | |
| download | linux-3f95001db7998c350422708a437694dda07bc04e.tar.xz | |
usb: dwc2: gadget: don't embed ep0 buffers
When using DMA, data of the previous setup packet can be read back
from cache because ep0 and ctrl buffers are embedded in struct s3c_hsotg.
Allocate buffers instead of embedding them.
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Reviewed-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
| -rw-r--r-- | drivers/usb/dwc2/core.h | 7 | ||||
| -rw-r--r-- | drivers/usb/dwc2/gadget.c | 16 |
2 files changed, 21 insertions, 2 deletions
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index 0d2ee29..7db83d0 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -434,6 +434,9 @@ struct dwc2_hw_params { u32 snpsid; }; +/* Size of control and EP0 buffers */ +#define DWC2_CTRL_BUFF_SIZE 8 + /** * struct dwc2_hsotg - Holds the state of the driver, including the non-periodic * and periodic schedules @@ -684,8 +687,8 @@ struct dwc2_hsotg { struct usb_request *ep0_reply; struct usb_request *ctrl_req; - u8 ep0_buff[8]; - u8 ctrl_buff[8]; + void *ep0_buff; + void *ctrl_buff; struct usb_gadget gadget; unsigned int enabled:1; diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 45afbf8..35d346f 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -3486,6 +3486,22 @@ int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq) s3c_hsotg_hw_cfg(hsotg); s3c_hsotg_init(hsotg); + hsotg->ctrl_buff = devm_kzalloc(hsotg->dev, + DWC2_CTRL_BUFF_SIZE, GFP_KERNEL); + if (!hsotg->ctrl_buff) { + dev_err(dev, "failed to allocate ctrl request buff\n"); + ret = -ENOMEM; + goto err_supplies; + } + + hsotg->ep0_buff = devm_kzalloc(hsotg->dev, + DWC2_CTRL_BUFF_SIZE, GFP_KERNEL); + if (!hsotg->ep0_buff) { + dev_err(dev, "failed to allocate ctrl reply buff\n"); + ret = -ENOMEM; + goto err_supplies; + } + ret = devm_request_irq(hsotg->dev, irq, s3c_hsotg_irq, IRQF_SHARED, dev_name(hsotg->dev), hsotg); if (ret < 0) { |