diff options
| author | Jan Kiszka <jan.kiszka@web.de> | 2010-02-08 10:12:38 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-16 16:01:33 -0800 |
| commit | 42792713f7f2664cf07501e1244d6da33a73ffc1 (patch) | |
| tree | 6e1ee9e4e4592fff6734039a77e1ef611a91cba3 /drivers/isdn/capi/capi.c | |
| parent | 42651b5c1aabf5eb60fbe98375ba127f4f6eb943 (diff) | |
| download | kernel_samsung_smdk4412-42792713f7f2664cf07501e1244d6da33a73ffc1.zip kernel_samsung_smdk4412-42792713f7f2664cf07501e1244d6da33a73ffc1.tar.gz kernel_samsung_smdk4412-42792713f7f2664cf07501e1244d6da33a73ffc1.tar.bz2 | |
CAPI: Use atomics for capiminor's datahandle and msgid
The capiminor members datahandle and msgid are incremented outside any
lock, so better do this atomically.
Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/isdn/capi/capi.c')
| -rw-r--r-- | drivers/isdn/capi/capi.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c index 9d4750a..08d5a8a 100644 --- a/drivers/isdn/capi/capi.c +++ b/drivers/isdn/capi/capi.c @@ -87,10 +87,10 @@ struct capiminor { unsigned int minor; struct dentry *capifs_dentry; - struct capi20_appl *ap; - u32 ncci; - u16 datahandle; - u16 msgid; + struct capi20_appl *ap; + u32 ncci; + atomic_t datahandle; + atomic_t msgid; struct tty_port port; int ttyinstop; @@ -227,7 +227,6 @@ static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) mp->ap = ap; mp->ncci = ncci; - mp->msgid = 0; INIT_LIST_HEAD(&mp->ackqueue); spin_lock_init(&mp->ackqlock); @@ -427,7 +426,7 @@ gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb) capimsg_setu16(s, 2, mp->ap->applid); capimsg_setu8 (s, 4, CAPI_DATA_B3); capimsg_setu8 (s, 5, CAPI_RESP); - capimsg_setu16(s, 6, mp->msgid++); + capimsg_setu16(s, 6, atomic_inc_return(&mp->msgid)); capimsg_setu32(s, 8, mp->ncci); capimsg_setu16(s, 12, datahandle); } @@ -554,7 +553,7 @@ static int handle_minor_send(struct capiminor *mp) } while ((skb = skb_dequeue(&mp->outqueue)) != NULL) { - datahandle = mp->datahandle; + datahandle = atomic_inc_return(&mp->datahandle); len = (u16)skb->len; skb_push(skb, CAPI_DATA_B3_REQ_LEN); memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN); @@ -562,7 +561,7 @@ static int handle_minor_send(struct capiminor *mp) capimsg_setu16(skb->data, 2, mp->ap->applid); capimsg_setu8 (skb->data, 4, CAPI_DATA_B3); capimsg_setu8 (skb->data, 5, CAPI_REQ); - capimsg_setu16(skb->data, 6, mp->msgid++); + capimsg_setu16(skb->data, 6, atomic_inc_return(&mp->msgid)); capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */ capimsg_setu32(skb->data, 12, (u32)(long)skb->data);/* Data32 */ capimsg_setu16(skb->data, 16, len); /* Data length */ @@ -577,7 +576,6 @@ static int handle_minor_send(struct capiminor *mp) } errcode = capi20_put_message(mp->ap, skb); if (errcode == CAPI_NOERROR) { - mp->datahandle++; count++; mp->outbytes -= len; #ifdef _DEBUG_DATAFLOW |