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[media] go7007: fix DMA related errors

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- Don't pass data allocated on the stack to usb_control_msg.
- Use dma_mapping_error after calling dma_map_page().

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2013-03-09 09:59:16 -03:00 committed by Mauro Carvalho Chehab
parent fabfd71153
commit 9b6ebf3309
4 changed files with 20 additions and 23 deletions
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1
drivers/staging/media/go7007/go7007-priv.h
View file

@ -188,6 +188,7 @@ struct go7007 {
int audio_enabled;
struct v4l2_subdev *sd_video;
struct v4l2_subdev *sd_audio;
u8 usb_buf[16];
/* Video input */
int input;

36
drivers/staging/media/go7007/go7007-usb.c
View file

@ -652,7 +652,7 @@ static int go7007_usb_ezusb_write_interrupt(struct go7007 *go,
{
struct go7007_usb *usb = go->hpi_context;
int i, r;
u16 status_reg;
u16 status_reg = 0;
int timeout = 500;
#ifdef GO7007_USB_DEBUG
@ -664,15 +664,17 @@ static int go7007_usb_ezusb_write_interrupt(struct go7007 *go,
r = usb_control_msg(usb->usbdev,
usb_rcvctrlpipe(usb->usbdev, 0), 0x14,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
0, HPI_STATUS_ADDR, &status_reg,
0, HPI_STATUS_ADDR, go->usb_buf,
sizeof(status_reg), timeout);
if (r < 0)
goto write_int_error;
__le16_to_cpus(&status_reg);
break;
status_reg = le16_to_cpu(*((u16 *)go->usb_buf));
if (!(status_reg & 0x0010))
break;
msleep(10);
}
if (r < 0)
goto write_int_error;
if (i == 100) {
printk(KERN_ERR
"go7007-usb: device is hung, status reg = 0x%04x\n",
@ -700,7 +702,6 @@ static int go7007_usb_onboard_write_interrupt(struct go7007 *go,
int addr, int data)
{
struct go7007_usb *usb = go->hpi_context;
u8 *tbuf;
int r;
int timeout = 500;
@ -709,17 +710,14 @@ static int go7007_usb_onboard_write_interrupt(struct go7007 *go,
"go7007-usb: WriteInterrupt: %04x %04x\n", addr, data);
#endif
tbuf = kzalloc(8, GFP_KERNEL);
if (tbuf == NULL)
return -ENOMEM;
tbuf[0] = data & 0xff;
tbuf[1] = data >> 8;
tbuf[2] = addr & 0xff;
tbuf[3] = addr >> 8;
go->usb_buf[0] = data & 0xff;
go->usb_buf[1] = data >> 8;
go->usb_buf[2] = addr & 0xff;
go->usb_buf[3] = addr >> 8;
go->usb_buf[4] = go->usb_buf[5] = go->usb_buf[6] = go->usb_buf[7] = 0;
r = usb_control_msg(usb->usbdev, usb_sndctrlpipe(usb->usbdev, 2), 0x00,
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0x55aa,
0xf0f0, tbuf, 8, timeout);
kfree(tbuf);
0xf0f0, go->usb_buf, 8, timeout);
if (r < 0) {
printk(KERN_ERR "go7007-usb: error in WriteInterrupt: %d\n", r);
return r;
@ -913,7 +911,7 @@ static int go7007_usb_i2c_master_xfer(struct i2c_adapter *adapter,
{
struct go7007 *go = i2c_get_adapdata(adapter);
struct go7007_usb *usb = go->hpi_context;
u8 buf[16];
u8 *buf = go->usb_buf;
int buf_len, i;
int ret = -EIO;
@ -1169,14 +1167,12 @@ static int go7007_usb_probe(struct usb_interface *intf,
/* Probe the tuner model on the TV402U */
if (go->board_id == GO7007_BOARDID_PX_TV402U_ANY) {
u8 data[3];
/* Board strapping indicates tuner model */
if (go7007_usb_vendor_request(go, 0x41, 0, 0, data, 3, 1) < 0) {
if (go7007_usb_vendor_request(go, 0x41, 0, 0, go->usb_buf, 3, 1) < 0) {
printk(KERN_ERR "go7007-usb: GPIO read failed!\n");
goto initfail;
}
switch (data[0] >> 6) {
switch (go->usb_buf[0] >> 6) {
case 1:
go->board_id = GO7007_BOARDID_PX_TV402U_EU;
go->tuner_type = TUNER_SONY_BTF_PG472Z;
@ -1309,8 +1305,8 @@ static void go7007_usb_disconnect(struct usb_interface *intf)
kfree(go->hpi_context);
go7007_remove(go);
go->status = STATUS_SHUTDOWN;
go7007_remove(go);
}
static struct usb_driver go7007_usb_driver = {

2
drivers/staging/media/go7007/s2250-board.c
View file

@ -584,7 +584,7 @@ static int s2250_probe(struct i2c_client *client,
if (audio == NULL)
return -ENOMEM;
state = kmalloc(sizeof(struct s2250), GFP_KERNEL);
state = kzalloc(sizeof(struct s2250), GFP_KERNEL);
if (state == NULL) {
i2c_unregister_device(audio);
return -ENOMEM;

4
drivers/staging/media/go7007/saa7134-go7007.c
View file

@ -261,12 +261,12 @@ static int saa7134_go7007_stream_start(struct go7007 *go)
saa->top_dma = dma_map_page(&dev->pci->dev, virt_to_page(saa->top),
0, PAGE_SIZE, DMA_FROM_DEVICE);
if (!saa->top_dma)
if (dma_mapping_error(&dev->pci->dev, saa->top_dma))
return -ENOMEM;
saa->bottom_dma = dma_map_page(&dev->pci->dev,
virt_to_page(saa->bottom),
0, PAGE_SIZE, DMA_FROM_DEVICE);
if (!saa->bottom_dma) {
if (dma_mapping_error(&dev->pci->dev, saa->bottom_dma)) {
dma_unmap_page(&dev->pci->dev, saa->top_dma, PAGE_SIZE,
DMA_FROM_DEVICE);
return -ENOMEM;