[PATCH 1/3] media/ttusb-budget: remove pci_zalloc_coherent abuse

From: Christoph Hellwig
Date: Tue Jan 09 2018 - 15:40:02 EST


Switch to a plain kzalloc instea of pci_zalloc_coherent to allocate
memory for the USB DMA.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c | 13 +++----------
1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c b/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
index a142b9dc0feb..b8619fb23351 100644
--- a/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
+++ b/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
@@ -102,7 +102,6 @@ struct ttusb {
unsigned int isoc_in_pipe;

void *iso_buffer;
- dma_addr_t iso_dma_handle;

struct urb *iso_urb[ISO_BUF_COUNT];

@@ -792,21 +791,15 @@ static void ttusb_free_iso_urbs(struct ttusb *ttusb)

for (i = 0; i < ISO_BUF_COUNT; i++)
usb_free_urb(ttusb->iso_urb[i]);
-
- pci_free_consistent(NULL,
- ISO_FRAME_SIZE * FRAMES_PER_ISO_BUF *
- ISO_BUF_COUNT, ttusb->iso_buffer,
- ttusb->iso_dma_handle);
+ kfree(ttusb->iso_buffer);
}

static int ttusb_alloc_iso_urbs(struct ttusb *ttusb)
{
int i;

- ttusb->iso_buffer = pci_zalloc_consistent(NULL,
- ISO_FRAME_SIZE * FRAMES_PER_ISO_BUF * ISO_BUF_COUNT,
- &ttusb->iso_dma_handle);
-
+ ttusb->iso_buffer = kzalloc(ISO_FRAME_SIZE * FRAMES_PER_ISO_BUF *
+ ISO_BUF_COUNT, GFP_KERNEL);
if (!ttusb->iso_buffer) {
dprintk("%s: pci_alloc_consistent - not enough memory\n",
__func__);
--
2.14.2