From 9b6ebf3309d1b2e62727133b446397a783813331 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sat, 9 Mar 2013 09:59:16 -0300 Subject: [PATCH] [media] go7007: fix DMA related errors - 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 Signed-off-by: Mauro Carvalho Chehab --- drivers/staging/media/go7007/go7007-priv.h | 1 + drivers/staging/media/go7007/go7007-usb.c | 36 ++++++++++++--------------- drivers/staging/media/go7007/s2250-board.c | 2 +- drivers/staging/media/go7007/saa7134-go7007.c | 4 +-- 4 files changed, 20 insertions(+), 23 deletions(-) diff --git a/drivers/staging/media/go7007/go7007-priv.h b/drivers/staging/media/go7007/go7007-priv.h index 1c4b049..daae6dd 100644 --- a/drivers/staging/media/go7007/go7007-priv.h +++ b/drivers/staging/media/go7007/go7007-priv.h @@ -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; diff --git a/drivers/staging/media/go7007/go7007-usb.c b/drivers/staging/media/go7007/go7007-usb.c index 0b1af50..f496720 100644 --- a/drivers/staging/media/go7007/go7007-usb.c +++ b/drivers/staging/media/go7007/go7007-usb.c @@ -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 = { diff --git a/drivers/staging/media/go7007/s2250-board.c b/drivers/staging/media/go7007/s2250-board.c index 37400bf..2266e1b 100644 --- a/drivers/staging/media/go7007/s2250-board.c +++ b/drivers/staging/media/go7007/s2250-board.c @@ -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; diff --git a/drivers/staging/media/go7007/saa7134-go7007.c b/drivers/staging/media/go7007/saa7134-go7007.c index d65e17a..afe21f3 100644 --- a/drivers/staging/media/go7007/saa7134-go7007.c +++ b/drivers/staging/media/go7007/saa7134-go7007.c @@ -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; -- 2.7.4