diff options
| author | Jeff Garzik <jeff@garzik.org> | 2007-05-31 21:26:23 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-06-03 18:08:44 -0700 |
| commit | b206a65d671d359d0947f0b6da9d418c49a9b28a (patch) | |
| tree | 54f18fc433b0706136554d95b516303b809487fe | |
| parent | 3f196eb519a419bf83ecc22753943fd0a0de4f8f (diff) | |
[ATM]: Fix warning.
The compiler warning
drivers/atm/firestream.c: In function ‘top_off_fp’:
drivers/atm/firestream.c:1505: warning: cast to pointer from integer of different size
does indicate a bug, albeit a minor one. Fixed, by using a 32-bit
temporary prior to the call to bus_to_virt().
The larger bug is still present: the entire driver assumes that machine
pointers are 32-bit, as it stores pointers in 32-bit hardware registers.
This is obvious to anyone who knows the driver well, but for the casual
readers it is helpfully noted with FIXME.
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/atm/firestream.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/atm/firestream.c b/drivers/atm/firestream.c index 9c67df5ccfa4..7f6d02ce1b5f 100644 --- a/drivers/atm/firestream.c +++ b/drivers/atm/firestream.c @@ -1475,6 +1475,7 @@ static void top_off_fp (struct fs_dev *dev, struct freepool *fp, struct FS_BPENTRY *qe, *ne; struct sk_buff *skb; int n = 0; + u32 qe_tmp; fs_dprintk (FS_DEBUG_QUEUE, "Topping off queue at %x (%d-%d/%d)\n", fp->offset, read_fs (dev, FP_CNT (fp->offset)), fp->n, @@ -1502,10 +1503,16 @@ static void top_off_fp (struct fs_dev *dev, struct freepool *fp, ne->skb = skb; ne->fp = fp; - qe = (struct FS_BPENTRY *) (read_fs (dev, FP_EA(fp->offset))); - fs_dprintk (FS_DEBUG_QUEUE, "link at %p\n", qe); - if (qe) { - qe = bus_to_virt ((long) qe); + /* + * FIXME: following code encodes and decodes + * machine pointers (could be 64-bit) into a + * 32-bit register. + */ + + qe_tmp = read_fs (dev, FP_EA(fp->offset)); + fs_dprintk (FS_DEBUG_QUEUE, "link at %x\n", qe_tmp); + if (qe_tmp) { + qe = bus_to_virt ((long) qe_tmp); qe->next = virt_to_bus(ne); qe->flags &= ~FP_FLAGS_EPI; } else |