diff options
| author | Felipe F. Tonello <eu@felipetonello.com> | 2015-10-27 11:36:32 +0100 |
|---|---|---|
| committer | Peter Chen <peter.chen@freescale.com> | 2015-12-24 07:15:26 +0100 |
| commit | 779debdf26d4b49598e61e0c28ac97146a2b96fe (patch) | |
| tree | f7f8690838478842e3d19203c136ff498cd58883 | |
| parent | usb: chipidea: udc: _ep_queue and _hw_queue cleanup (diff) | |
| download | linux-779debdf26d4b49598e61e0c28ac97146a2b96fe.tar.xz linux-779debdf26d4b49598e61e0c28ac97146a2b96fe.zip | |
usb: chipidea: udc: improve error handling on _hardware_enqueue
_hardware_enqueue() didn't check for errors when using
add_td_to_list() which can fail if dma_pool_alloc fails, thus
causing a kernel panic when lastnode->ptr is NULL.
Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
| -rw-r--r-- | drivers/usb/chipidea/udc.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index d917b3f27ddb..b1e7b716e8c9 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -434,19 +434,28 @@ static int _hardware_enqueue(struct ci_hw_ep *hwep, struct ci_hw_req *hwreq) if (hwreq->req.dma % PAGE_SIZE) pages--; - if (rest == 0) - add_td_to_list(hwep, hwreq, 0); + if (rest == 0) { + ret = add_td_to_list(hwep, hwreq, 0); + if (ret < 0) + goto done; + } while (rest > 0) { unsigned count = min(hwreq->req.length - hwreq->req.actual, (unsigned)(pages * CI_HDRC_PAGE_SIZE)); - add_td_to_list(hwep, hwreq, count); + ret = add_td_to_list(hwep, hwreq, count); + if (ret < 0) + goto done; + rest -= count; } if (hwreq->req.zero && hwreq->req.length && hwep->dir == TX - && (hwreq->req.length % hwep->ep.maxpacket == 0)) - add_td_to_list(hwep, hwreq, 0); + && (hwreq->req.length % hwep->ep.maxpacket == 0)) { + ret = add_td_to_list(hwep, hwreq, 0); + if (ret < 0) + goto done; + } firstnode = list_first_entry(&hwreq->tds, struct td_node, td); |