diff options
| author | Clark Williams <williams@redhat.com> | 2012-04-04 10:52:26 -0500 |
|---|---|---|
| committer | Clark Williams <williams@redhat.com> | 2012-04-04 10:52:26 -0500 |
| commit | 2d93eaf2d4ace5853a74a4b0596f601aa62cb840 (patch) | |
| tree | b0a2e2083c1749c4e3b8ae23db7bb13a7ca9aafe /drivers/usb/musb/musb_gadget.c | |
| parent | 003133585fc61d7bd36d3a097d7fde62e64a9550 (diff) | |
| parent | 23d8c3f8f494c8516c9b4c05529e118e6a485956 (diff) | |
Merge commit 'v3.2.14' into rt-3.2.14-rt23v3.2.14-rt23
Diffstat (limited to 'drivers/usb/musb/musb_gadget.c')
| -rw-r--r-- | drivers/usb/musb/musb_gadget.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index 922148ff8d29..c860597eeb3a 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -576,6 +576,15 @@ void musb_g_tx(struct musb *musb, u8 epnum) if (request->actual == request->length) { musb_g_giveback(musb_ep, request, 0); + /* + * In the giveback function the MUSB lock is + * released and acquired after sometime. During + * this time period the INDEX register could get + * changed by the gadget_queue function especially + * on SMP systems. Reselect the INDEX to be sure + * we are reading/modifying the right registers + */ + musb_ep_select(mbase, epnum); req = musb_ep->desc ? next_request(musb_ep) : NULL; if (!req) { dev_dbg(musb->controller, "%s idle now\n", @@ -985,6 +994,15 @@ void musb_g_rx(struct musb *musb, u8 epnum) } #endif musb_g_giveback(musb_ep, request, 0); + /* + * In the giveback function the MUSB lock is + * released and acquired after sometime. During + * this time period the INDEX register could get + * changed by the gadget_queue function especially + * on SMP systems. Reselect the INDEX to be sure + * we are reading/modifying the right registers + */ + musb_ep_select(mbase, epnum); req = next_request(musb_ep); if (!req) |