diff options
Diffstat (limited to 'drivers/net/wan/farsync.c')
| -rw-r--r-- | drivers/net/wan/farsync.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/net/wan/farsync.c b/drivers/net/wan/farsync.c index cf27bf40d36..547368e9633 100644 --- a/drivers/net/wan/farsync.c +++ b/drivers/net/wan/farsync.c @@ -2024,6 +2024,7 @@ fst_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) struct fstioc_write wrthdr; struct fstioc_info info; unsigned long flags; + void *buf; dbg(DBG_IOCTL, "ioctl: %x, %p\n", cmd, ifr->ifr_data); @@ -2065,16 +2066,22 @@ fst_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) return -ENXIO; } - /* Now copy the data to the card. - * This will probably break on some architectures. - * I'll fix it when I have something to test on. - */ - if (copy_from_user(card->mem + wrthdr.offset, + /* Now copy the data to the card. */ + + buf = kmalloc(wrthdr.size, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + if (copy_from_user(buf, ifr->ifr_data + sizeof (struct fstioc_write), wrthdr.size)) { + kfree(buf); return -EFAULT; } + memcpy_toio(card->mem + wrthdr.offset, buf, wrthdr.size); + kfree(buf); + /* Writes to the memory of a card in the reset state constitute * a download */ |