diff options
| author | Yuan Can <yuancan@huawei.com> | 2023-01-19 11:31:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-11 18:40:16 +0300 |
| commit | e8a5efd5aefcc7de0f06983dd6038e4ce3a57632 (patch) | |
| tree | bfc5748bebc625e5d923eefc206538ea6ee057ed /drivers | |
| parent | c4d96503d67b2c4de9772521cac84e5f25218c7c (diff) | |
| download | linux-e8a5efd5aefcc7de0f06983dd6038e4ce3a57632.tar.xz | |
staging: emxx_udc: Add checks for dma_alloc_coherent()
[ Upstream commit f6510a93cfd8c6c79b4dda0f2967cdc6df42eff4 ]
As the dma_alloc_coherent may return NULL, the return value needs to be
checked to avoid NULL poineter dereference.
Signed-off-by: Yuan Can <yuancan@huawei.com>
Reviewed-by: Simon Horman <horms@verge.net.au>
Link: https://lore.kernel.org/r/20230119083119.16956-1-yuancan@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/emxx_udc/emxx_udc.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/staging/emxx_udc/emxx_udc.c b/drivers/staging/emxx_udc/emxx_udc.c index 3897f8e8f5e0..6870a33d4ccf 100644 --- a/drivers/staging/emxx_udc/emxx_udc.c +++ b/drivers/staging/emxx_udc/emxx_udc.c @@ -2591,10 +2591,15 @@ static int nbu2ss_ep_queue(struct usb_ep *_ep, req->unaligned = false; if (req->unaligned) { - if (!ep->virt_buf) + if (!ep->virt_buf) { ep->virt_buf = dma_alloc_coherent(udc->dev, PAGE_SIZE, &ep->phys_buf, GFP_ATOMIC | GFP_DMA); + if (!ep->virt_buf) { + spin_unlock_irqrestore(&udc->lock, flags); + return -ENOMEM; + } + } if (ep->epnum > 0) { if (ep->direct == USB_DIR_IN) memcpy(ep->virt_buf, req->req.buf, |