diff options
| author | Tony LIU <junjie.liu@freescale.com> | 2012-07-20 17:54:35 +0800 |
|---|---|---|
| committer | Terry Lv <r65388@freescale.com> | 2012-07-25 13:11:34 +0800 |
| commit | 409bd258668e38bd13e29534c04c64b3c1a11b9e (patch) | |
| tree | e1ea283fc4ab41c0df0c1ca52e486b01cdf56145 /drivers/usb | |
| parent | 651ce784926d727761ce510a0eb530c9e72e2793 (diff) | |
ENGR00217721-5 usb gadget random transfer fail
usb driver part
- After USB driver prime a bulk transfer(whatever IN or OUT, take
OUT for example) on ep1, only one dTD is primed, an USB Interrupt
(bit 0 of USBSTS) will be issued, and find that endptcomplete
register is 0x2 which means an OUT transfer on ep1 is completed,
at this time the ep1 out queue head status is 0x1e18000, and next
dtd pointer is 0x1 which means transfer is done and everything is
OK, while the dTD token status is 0x2008080 which means this dTD
is still active, not completed yet.
- Audio SDMA and Ethernet have the similar issue
- root cause is not found yet
- work around:
change the non-cacheable bufferable memory to non-cacheable
non-bufferable memory to make this issue disappear.
Signed-off-by: Tony LIU <junjie.liu@freescale.com>
Diffstat (limited to 'drivers/usb')
| -rwxr-xr-x | drivers/usb/gadget/arcotg_udc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/gadget/arcotg_udc.c b/drivers/usb/gadget/arcotg_udc.c index a7bc4801d83c..2415c8703ea7 100755 --- a/drivers/usb/gadget/arcotg_udc.c +++ b/drivers/usb/gadget/arcotg_udc.c @@ -956,7 +956,11 @@ static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length, (unsigned)EP_MAX_LENGTH_TRANSFER); if (NEED_IRAM(req->ep)) *length = min(*length, g_iram_size); +#ifdef CONFIG_FSL_UTP + dtd = dma_pool_alloc_nonbufferable(udc_controller->td_pool, GFP_ATOMIC, dma); +#else dtd = dma_pool_alloc(udc_controller->td_pool, GFP_ATOMIC, dma); +#endif if (dtd == NULL) return dtd; |