Skip to content
Permalink
Browse files Browse the repository at this point in the history
catc: Use heap buffer for memory size test
Allocating USB buffers on the stack is not portable, and no longer
works on x86_64 (with VMAP_STACK enabled as per default).

Fixes: 1da177e ("Linux-2.6.12-rc2")
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
  • Loading branch information
bwhacks authored and davem330 committed Feb 7, 2017
1 parent d411491 commit 2d6a0e9
Showing 1 changed file with 18 additions and 7 deletions.
25 changes: 18 additions & 7 deletions drivers/net/usb/catc.c
Expand Up @@ -776,7 +776,7 @@ static int catc_probe(struct usb_interface *intf, const struct usb_device_id *id
struct net_device *netdev;
struct catc *catc;
u8 broadcast[ETH_ALEN];
int i, pktsz, ret;
int pktsz, ret;

if (usb_set_interface(usbdev,
intf->altsetting->desc.bInterfaceNumber, 1)) {
Expand Down Expand Up @@ -840,15 +840,24 @@ static int catc_probe(struct usb_interface *intf, const struct usb_device_id *id
catc->irq_buf, 2, catc_irq_done, catc, 1);

if (!catc->is_f5u011) {
u32 *buf;
int i;

dev_dbg(dev, "Checking memory size\n");

i = 0x12345678;
catc_write_mem(catc, 0x7a80, &i, 4);
i = 0x87654321;
catc_write_mem(catc, 0xfa80, &i, 4);
catc_read_mem(catc, 0x7a80, &i, 4);
buf = kmalloc(4, GFP_KERNEL);
if (!buf) {
ret = -ENOMEM;
goto fail_free;
}

*buf = 0x12345678;
catc_write_mem(catc, 0x7a80, buf, 4);
*buf = 0x87654321;
catc_write_mem(catc, 0xfa80, buf, 4);
catc_read_mem(catc, 0x7a80, buf, 4);

switch (i) {
switch (*buf) {
case 0x12345678:
catc_set_reg(catc, TxBufCount, 8);
catc_set_reg(catc, RxBufCount, 32);
Expand All @@ -863,6 +872,8 @@ static int catc_probe(struct usb_interface *intf, const struct usb_device_id *id
dev_dbg(dev, "32k Memory\n");
break;
}

kfree(buf);

dev_dbg(dev, "Getting MAC from SEEROM.\n");

Expand Down

0 comments on commit 2d6a0e9

Please sign in to comment.