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media: dvb: i2c transfers over usb cannot be done from stack

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Cc: stable@vger.kernel.org
Signed-off-by: Laurent Caumont <lcaumont2@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Laurent Caumont 2017-11-11 12:44:46 -05:00 committed by Mauro Carvalho Chehab
parent be9b53c837
commit 6d33377f2a
1 changed files with 14 additions and 2 deletions
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16
drivers/media/usb/dvb-usb/dibusb-common.c
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@ -223,8 +223,20 @@ EXPORT_SYMBOL(dibusb_i2c_algo);
int dibusb_read_eeprom_byte(struct dvb_usb_device *d, u8 offs, u8 *val)
{
u8 wbuf[1] = { offs };
return dibusb_i2c_msg(d, 0x50, wbuf, 1, val, 1);
u8 *buf;
int rc;
buf = kmalloc(2, GFP_KERNEL);
if (!buf)
return -ENOMEM;
buf[0] = offs;
rc = dibusb_i2c_msg(d, 0x50, &buf[0], 1, &buf[1], 1);
*val = buf[1];
kfree(buf);
return rc;
}
EXPORT_SYMBOL(dibusb_read_eeprom_byte);