From 2c3449fb95c318920ca8dc645d918d408db219ac Mon Sep 17 00:00:00 2001 From: Jia-Ju Bai Date: Mon, 30 Jul 2018 05:33:20 -0400 Subject: [PATCH] media: usb: hackrf: Replace GFP_ATOMIC with GFP_KERNEL hackrf_submit_urbs(), hackrf_alloc_stream_bufs() and hackrf_alloc_urbs() are never called in atomic context. They call usb_submit_urb(), usb_alloc_coherent() and usb_alloc_urb() with GFP_ATOMIC, which is not necessary. GFP_ATOMIC can be replaced with GFP_KERNEL. This is found by a static analysis tool named DCNS written by myself. Signed-off-by: Jia-Ju Bai Signed-off-by: Mauro Carvalho Chehab --- drivers/media/usb/hackrf/hackrf.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/media/usb/hackrf/hackrf.c b/drivers/media/usb/hackrf/hackrf.c index 6d692fb3e8dd..34085a0b15a1 100644 --- a/drivers/media/usb/hackrf/hackrf.c +++ b/drivers/media/usb/hackrf/hackrf.c @@ -597,7 +597,7 @@ static int hackrf_submit_urbs(struct hackrf_dev *dev) for (i = 0; i < dev->urbs_initialized; i++) { dev_dbg(dev->dev, "submit urb=%d\n", i); - ret = usb_submit_urb(dev->urb_list[i], GFP_ATOMIC); + ret = usb_submit_urb(dev->urb_list[i], GFP_KERNEL); if (ret) { dev_err(dev->dev, "Could not submit URB no. %d - get them all back\n", i); @@ -636,7 +636,7 @@ static int hackrf_alloc_stream_bufs(struct hackrf_dev *dev) for (dev->buf_num = 0; dev->buf_num < MAX_BULK_BUFS; dev->buf_num++) { dev->buf_list[dev->buf_num] = usb_alloc_coherent(dev->udev, - BULK_BUFFER_SIZE, GFP_ATOMIC, + BULK_BUFFER_SIZE, GFP_KERNEL, &dev->dma_addr[dev->buf_num]); if (!dev->buf_list[dev->buf_num]) { dev_dbg(dev->dev, "alloc buf=%d failed\n", @@ -689,7 +689,7 @@ static int hackrf_alloc_urbs(struct hackrf_dev *dev, bool rcv) /* allocate the URBs */ for (i = 0; i < MAX_BULK_BUFS; i++) { dev_dbg(dev->dev, "alloc urb=%d\n", i); - dev->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC); + dev->urb_list[i] = usb_alloc_urb(0, GFP_KERNEL); if (!dev->urb_list[i]) { for (j = 0; j < i; j++) usb_free_urb(dev->urb_list[j]);