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cxgb4i: fix tx immediate data credit check 

Only data skbs need the wr header added while control skbs do not. Make sure
they are treated differently.

Signed-off-by: Karen Xie <kxie@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Karen Xie 2014-12-11 19:13:29 -08:00 committed by David S. Miller
parent 37e9a69045
commit 84944d8cf5
2 changed files with 17 additions and 9 deletions
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22
drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
View File

@ -172,10 +172,14 @@ static int push_tx_frames(struct cxgbi_sock *, int);
* Returns true if a packet can be sent as an offload WR with immediate
* data. We currently use the same limit as for Ethernet packets.
*/
static inline int is_ofld_imm(const struct sk_buff *skb)
static inline bool is_ofld_imm(const struct sk_buff *skb)
{
return skb->len <= (MAX_IMM_TX_PKT_LEN -
sizeof(struct fw_ofld_tx_data_wr));
int len = skb->len;
if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
len += sizeof(struct fw_ofld_tx_data_wr);
return len <= MAX_IMM_TX_PKT_LEN;
}
static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
@ -600,11 +604,15 @@ static int push_tx_frames(struct cxgbi_sock *csk, int req_completion)
skb_reset_transport_header(skb);
if (is_ofld_imm(skb))
credits_needed = DIV_ROUND_UP(dlen +
sizeof(struct fw_ofld_tx_data_wr), 16);
credits_needed = DIV_ROUND_UP(dlen, 16);
else
credits_needed = DIV_ROUND_UP(8*calc_tx_flits_ofld(skb)
+ sizeof(struct fw_ofld_tx_data_wr),
credits_needed = DIV_ROUND_UP(
8 * calc_tx_flits_ofld(skb),
16);
if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR)))
credits_needed += DIV_ROUND_UP(
sizeof(struct fw_ofld_tx_data_wr),
16);
if (csk->wr_cred < credits_needed) {

4
drivers/scsi/cxgbi/libcxgbi.h
View File

@ -317,8 +317,8 @@ static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb,
__clear_bit(flag, &(cxgbi_skcb_flags(skb)));
}
static inline int cxgbi_skcb_test_flag(struct sk_buff *skb,
enum cxgbi_skcb_flags flag)
static inline int cxgbi_skcb_test_flag(const struct sk_buff *skb,
enum cxgbi_skcb_flags flag)
{
return test_bit(flag, &(cxgbi_skcb_flags(skb)));
}