diff options
| author | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2019-05-22 14:07:36 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-10 09:53:36 +0200 |
| commit | 26a6acde2a42d8e0f23dffb172b4c1cbc9d14f9e (patch) | |
| tree | b2e8711fc57227f9857f06d6aff52ee93c005d9b | |
| parent | 9be058f5dd70360d6840c8dbbaff3e7dc9d972f5 (diff) | |
| download | linux-stable-26a6acde2a42d8e0f23dffb172b4c1cbc9d14f9e.tar.gz | |
usb: gadget: udc: lpc32xx: allocate descriptor with GFP_ATOMIC
[ Upstream commit fbc318afadd6e7ae2252d6158cf7d0c5a2132f7d ]
Gadget drivers may queue request in interrupt context. This would lead to
a descriptor allocation in that context. In that case we would hit
BUG_ON(in_interrupt()) in __get_vm_area_node.
Also remove the unnecessary cast.
Acked-by: Sylvain Lemieux <slemieux.tyco@gmail.com>
Tested-by: James Grant <jamesg@zaltys.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/usb/gadget/udc/lpc32xx_udc.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c b/drivers/usb/gadget/udc/lpc32xx_udc.c index b0781771704e66..eafc2a00c96a01 100644 --- a/drivers/usb/gadget/udc/lpc32xx_udc.c +++ b/drivers/usb/gadget/udc/lpc32xx_udc.c @@ -922,8 +922,7 @@ static struct lpc32xx_usbd_dd_gad *udc_dd_alloc(struct lpc32xx_udc *udc) dma_addr_t dma; struct lpc32xx_usbd_dd_gad *dd; - dd = (struct lpc32xx_usbd_dd_gad *) dma_pool_alloc( - udc->dd_cache, (GFP_KERNEL | GFP_DMA), &dma); + dd = dma_pool_alloc(udc->dd_cache, GFP_ATOMIC | GFP_DMA, &dma); if (dd) dd->this_dma = dma; |