diff options
| author | Laurent Caumont <lcaumont2@gmail.com> | 2017-11-11 12:44:46 -0500 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-11-30 04:39:32 -0500 |
| commit | 6d33377f2abbf9f0e561b116dd468d1c3ff36a6a (patch) | |
| tree | eb7885ca2fe040e52e289404c7cde4a256f218f3 | |
| parent | be9b53c83792e3898755dce90f8c632d40e7c83e (diff) | |
| download | linux-6d33377f2abbf9f0e561b116dd468d1c3ff36a6a.tar.gz | |
media: dvb: i2c transfers over usb cannot be done from stack
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>
| -rw-r--r-- | drivers/media/usb/dvb-usb/dibusb-common.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/media/usb/dvb-usb/dibusb-common.c b/drivers/media/usb/dvb-usb/dibusb-common.c index 8207e6900656..bcacb0f22028 100644 --- a/drivers/media/usb/dvb-usb/dibusb-common.c +++ b/drivers/media/usb/dvb-usb/dibusb-common.c @@ -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); |