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authorAntti Palosaari <crope@iki.fi>2014-12-21 18:33:14 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-02-03 16:24:49 -0200
commitc56222a6b25c24f211ecefd6ecc1003a7cb075d4 (patch)
tree981f01c3f076f2330fa31a08cbc46eb270c85ce6 /drivers/media
parent5ba4ca1a14c3cf62064c7edc30f05c40dd7ecee2 (diff)
downloadlinux-c56222a6b25c24f211ecefd6ecc1003a7cb075d4.tar.bz2
[media] rtl28xxu: move usb buffers to state
Buffer needed for USB control message is small so move it to state and get rid of alloc/free used for each control message. Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/usb/dvb-usb-v2/rtl28xxu.c31
-rw-r--r--drivers/media/usb/dvb-usb-v2/rtl28xxu.h1
2 files changed, 10 insertions, 22 deletions
diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
index e3312a21a090..b0d2467398f2 100644
--- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
+++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
@@ -29,20 +29,14 @@ DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
static int rtl28xxu_ctrl_msg(struct dvb_usb_device *d, struct rtl28xxu_req *req)
{
+ struct rtl28xxu_dev *dev = d->priv;
int ret;
unsigned int pipe;
u8 requesttype;
- u8 *buf;
-
- buf = kmalloc(req->size, GFP_KERNEL);
- if (!buf) {
- ret = -ENOMEM;
- goto err;
- }
if (req->index & CMD_WR_FLAG) {
/* write */
- memcpy(buf, req->data, req->size);
+ memcpy(dev->buf, req->data, req->size);
requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
pipe = usb_sndctrlpipe(d->udev, 0);
} else {
@@ -52,24 +46,17 @@ static int rtl28xxu_ctrl_msg(struct dvb_usb_device *d, struct rtl28xxu_req *req)
}
ret = usb_control_msg(d->udev, pipe, 0, requesttype, req->value,
- req->index, buf, req->size, 1000);
-
+ req->index, dev->buf, req->size, 1000);
dvb_usb_dbg_usb_control_msg(d->udev, 0, requesttype, req->value,
- req->index, buf, req->size);
-
- if (ret > 0)
- ret = 0;
+ req->index, dev->buf, req->size);
+ if (ret < 0)
+ goto err;
/* read request, copy returned data to return buf */
- if (!ret && requesttype == (USB_TYPE_VENDOR | USB_DIR_IN))
- memcpy(req->data, buf, req->size);
-
- kfree(buf);
+ if (requesttype == (USB_TYPE_VENDOR | USB_DIR_IN))
+ memcpy(req->data, dev->buf, req->size);
- if (ret)
- goto err;
-
- return ret;
+ return 0;
err:
dev_dbg(&d->intf->dev, "failed=%d\n", ret);
return ret;
diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.h b/drivers/media/usb/dvb-usb-v2/rtl28xxu.h
index abf0111a3fda..1b5d7ffb685e 100644
--- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.h
+++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.h
@@ -69,6 +69,7 @@
struct rtl28xxu_dev {
+ u8 buf[28];
u8 chip_id;
u8 tuner;
char *tuner_name;