diff options
| author | Tang, Jianqiang <jianqiang.tang@intel.com> | 2016-02-17 02:02:07 +0300 |
|---|---|---|
| committer | Felipe Balbi <balbi@kernel.org> | 2016-02-17 11:32:09 +0300 |
| commit | 62943b7dfa35887a40f71f698deec4488bf73036 (patch) | |
| tree | 2fa89d1d3842c58033fcd72d8b4df924ed5fe7b6 /drivers/usb | |
| parent | 3142a16b9816c24501103a92010a283eb6e2766c (diff) | |
| download | linux-62943b7dfa35887a40f71f698deec4488bf73036.tar.xz | |
usb: dwc2: host: fix the data toggle error in full speed descriptor dma
There will be data toggle error happen for full speed buld-out transfer.
The data toggle bit is saved in qh for non-control transfers, it is wrong
to check the qtd for that case.
Also fix one static analysis tool issue after fix the data toggle error.
John Youn:
* Added WARN() to warn on improper usage of the
dwc2_hcd_save_data_toggle() function.
Signed-off-by: Dyson Lee <dyson.lee@intel.com>
Signed-off-by: Tang, Jianqiang <jianqiang.tang@intel.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/dwc2/hcd_ddma.c | 2 | ||||
| -rw-r--r-- | drivers/usb/dwc2/hcd_intr.c | 8 |
2 files changed, 9 insertions, 1 deletions
diff --git a/drivers/usb/dwc2/hcd_ddma.c b/drivers/usb/dwc2/hcd_ddma.c index 89db47a1ffed..a41274aa52ad 100644 --- a/drivers/usb/dwc2/hcd_ddma.c +++ b/drivers/usb/dwc2/hcd_ddma.c @@ -1257,7 +1257,7 @@ stop_scan: */ if (halt_status == DWC2_HC_XFER_STALL) qh->data_toggle = DWC2_HC_PID_DATA0; - else if (qtd) + else dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd); } diff --git a/drivers/usb/dwc2/hcd_intr.c b/drivers/usb/dwc2/hcd_intr.c index f8253803a050..cadba8b13c48 100644 --- a/drivers/usb/dwc2/hcd_intr.c +++ b/drivers/usb/dwc2/hcd_intr.c @@ -525,11 +525,19 @@ void dwc2_hcd_save_data_toggle(struct dwc2_hsotg *hsotg, u32 pid = (hctsiz & TSIZ_SC_MC_PID_MASK) >> TSIZ_SC_MC_PID_SHIFT; if (chan->ep_type != USB_ENDPOINT_XFER_CONTROL) { + if (WARN(!chan || !chan->qh, + "chan->qh must be specified for non-control eps\n")) + return; + if (pid == TSIZ_SC_MC_PID_DATA0) chan->qh->data_toggle = DWC2_HC_PID_DATA0; else chan->qh->data_toggle = DWC2_HC_PID_DATA1; } else { + if (WARN(!qtd, + "qtd must be specified for control eps\n")) + return; + if (pid == TSIZ_SC_MC_PID_DATA0) qtd->data_toggle = DWC2_HC_PID_DATA0; else |