Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b393243fe7b711eb18eafaaf469bdb39317adf5b
Commit: b393243fe7b711eb18eafaaf469bdb39317adf5b
Parent: 2a397e82c7db18019e408f953dd58dc1963a328c
Author: Jeff Garzik <[EMAIL PROTECTED]>
AuthorDate: Thu Oct 25 23:02:14 2007 -0400
Committer: Jeff Garzik <[EMAIL PROTECTED]>
CommitDate: Mon Oct 29 04:45:06 2007 -0400
[ISDN] capidrv: address two longstanding warnings
* change #warning to a code comment
* add comment and special ifdef'd 64-bit code for a situation where
we must store a pointer into a CAPI field 'Data', which is fixed by
the interface at 32 bits.
Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]>
Acked-by: Karsten Keil <[EMAIL PROTECTED]>
---
drivers/isdn/capi/capidrv.c | 25 +++++++++++++++++++++++--
1 files changed, 23 insertions(+), 2 deletions(-)
diff --git a/drivers/isdn/capi/capidrv.c b/drivers/isdn/capi/capidrv.c
index 476012b..48c1775 100644
--- a/drivers/isdn/capi/capidrv.c
+++ b/drivers/isdn/capi/capidrv.c
@@ -1843,6 +1843,7 @@ static int if_sendbuf(int id, int channel, int doack,
struct sk_buff *skb)
int msglen;
u16 errcode;
u16 datahandle;
+ u32 data;
if (!card) {
printk(KERN_ERR "capidrv: if_sendbuf called with invalid
driverId %d!\n",
@@ -1860,9 +1861,26 @@ static int if_sendbuf(int id, int channel, int doack,
struct sk_buff *skb)
return 0;
}
datahandle = nccip->datahandle;
+
+ /*
+ * Here we copy pointer skb->data into the 32-bit 'Data' field.
+ * The 'Data' field is not used in practice in linux kernel
+ * (neither in 32 or 64 bit), but should have some value,
+ * since a CAPI message trace will display it.
+ *
+ * The correct value in the 32 bit case is the address of the
+ * data, in 64 bit it makes no sense, we use 0 there.
+ */
+
+#ifdef CONFIG_64BIT
+ data = 0;
+#else
+ data = (unsigned long) skb->data;
+#endif
+
capi_fill_DATA_B3_REQ(&sendcmsg, global.ap.applid, card->msgid++,
nccip->ncci, /* adr */
- (u32) skb->data, /* Data */
+ data, /* Data */
skb->len, /* DataLength */
datahandle, /* DataHandle */
0 /* Flags */
@@ -2123,7 +2141,10 @@ static int capidrv_delcontr(u16 contr)
printk(KERN_ERR "capidrv: delcontr: no contr %u\n", contr);
return -1;
}
- #warning FIXME: maybe a race condition the card should be removed here
from global list /kkeil
+
+ /* FIXME: maybe a race condition the card should be removed
+ * here from global list /kkeil
+ */
spin_unlock_irqrestore(&global_lock, flags);
del_timer(&card->listentimer);
-
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