system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-10-11 22:05:39 +00:00
Code Issues Packages Projects Releases Wiki Activity

ieee802154: atusb: do not use the stack for address fetching to make it DMA able

Browse source 
From 4.9 we should really avoid using the stack here as this will not be DMA
able on various platforms. This changes a buffer that was introduced in the
4.10 merge window.

Fixes: 6cc33eba23 ("ieee802154: atusb: try to read permanent extended
address from device")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Stefan Schmidt 2016-12-15 18:40:16 +01:00 committed by Marcel Holtmann
parent 2fd2b550a5
commit 5eb35a6cce
1 changed files with 7 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
drivers/net/ieee802154/atusb.c
View file

@ -721,7 +721,7 @@ static int atusb_get_and_show_chip(struct atusb *atusb)
static int atusb_set_extended_addr(struct atusb *atusb)
{
struct usb_device *usb_dev = atusb->usb_dev;
unsigned char buffer[IEEE802154_EXTENDED_ADDR_LEN];
unsigned char *buffer;
__le64 extended_addr;
u64 addr;
int ret;
@ -733,6 +733,10 @@ static int atusb_set_extended_addr(struct atusb *atusb)
return 0;
}
buffer = kmalloc(IEEE802154_EXTENDED_ADDR_LEN, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
/* Firmware is new enough so we fetch the address from EEPROM */
ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0),
ATUSB_EUI64_READ, ATUSB_REQ_FROM_DEV, 0, 0,
@ -740,6 +744,7 @@ static int atusb_set_extended_addr(struct atusb *atusb)
if (ret < 0) {
dev_err(&usb_dev->dev, "failed to fetch extended address, random address set\n");
ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr);
kfree(buffer);
return ret;
}
@ -755,6 +760,7 @@ static int atusb_set_extended_addr(struct atusb *atusb)
&addr);
}
kfree(buffer);
return ret;
}