diff options
| author | Jean-Francois Moine <moinejf@free.fr> | 2008-09-03 20:12:19 (GMT) |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-09-03 21:37:42 (GMT) |
| commit | 8295d99ee5340f1e62b53c8adc979e0789299445 (patch) | |
| tree | d537fd27c8079bec09b513845dc2cf9c21234482 /drivers/media/video/gspca/mars.c | |
| parent | 91de65ac00f976c972940bedd9dbfe38bb8bfec3 (diff) | |
| download | linux-8295d99ee5340f1e62b53c8adc979e0789299445.tar.xz | |
V4L/DVB (8829): gspca: Have a clean kmalloc-ated buffer for USB exchanges.
The USB buffer may be used for DMA and there may be a caching problem
if the buffer is part of the device structure.
Thanks to Alan Stern.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/gspca/mars.c')
| -rw-r--r-- | drivers/media/video/gspca/mars.c | 21 |
1 files changed, 1 insertions, 20 deletions
diff --git a/drivers/media/video/gspca/mars.c b/drivers/media/video/gspca/mars.c index 2814759..4d5db47 100644 --- a/drivers/media/video/gspca/mars.c +++ b/drivers/media/video/gspca/mars.c @@ -100,22 +100,6 @@ static int reg_w(struct gspca_dev *gspca_dev, return rc; } -static int reg_w_buf(struct gspca_dev *gspca_dev, - __u16 index, __u8 *buf, int len) -{ - int rc; - - rc = usb_control_msg(gspca_dev->dev, - usb_sndbulkpipe(gspca_dev->dev, 4), - 0x12, - 0xc8, /* ?? */ - 0, /* value */ - index, buf, len, 500); - if (rc < 0) - PDEBUG(D_ERR, "reg write [%02x] error %d", index, rc); - return rc; -} - static void bulk_w(struct gspca_dev *gspca_dev, __u16 *pch, __u16 Address) @@ -175,7 +159,6 @@ static void sd_start(struct gspca_dev *gspca_dev) /* Initialize the MR97113 chip register */ - data = kmalloc(16, GFP_KERNEL); data[0] = 0x00; /* address */ data[1] = 0x0c | 0x01; /* reg 0 */ data[2] = 0x01; /* reg 1 */ @@ -195,12 +178,10 @@ static void sd_start(struct gspca_dev *gspca_dev) data[10] = 0x5d; /* reg 9, I2C device address * [for PAS5101 (0x40)] [for MI (0x5d)] */ - err_code = reg_w_buf(gspca_dev, data[0], data, 11); - kfree(data); + err_code = reg_w(gspca_dev, data[0], 11); if (err_code < 0) return; - data = gspca_dev->usb_buf; data[0] = 0x23; /* address */ data[1] = 0x09; /* reg 35, append frame header */ |