diff mbox

[net,v8,1/7] cxgb4i: fix tx immediate data credit check

Message ID 201412102111.sBALB6sI011656@localhost6.localdomain6
State Changes Requested, archived
Delegated to: David Miller
Headers show

Commit Message

Karen Xie Dec. 10, 2014, 9:11 p.m. UTC
From: Karen Xie <kxie@chelsio.com>

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>
---
 drivers/scsi/cxgbi/cxgb4i/cxgb4i.c |   22 +++++++++++++++-------
 drivers/scsi/cxgbi/libcxgbi.h      |    4 ++--
 2 files changed, 17 insertions(+), 9 deletions(-)

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Comments

David Miller Dec. 11, 2014, 3:54 a.m. UTC | #1
From: Karen Xie <kxie@chelsio.com>
Date: Wed, 10 Dec 2014 13:11:06 -0800

> From: Karen Xie <kxie@chelsio.com>
> 
> 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>

Please text format your commit messages to 80 characters or less per
line.

People are going to read your commits using text tools, not
necessarily GUI tools which will auto-format your commit message.

I know this seems like we are being difficult, but you are making many
fundamental mistakes in your efforts to merge in these changes.
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Karen Xie Dec. 11, 2014, 3:26 p.m. UTC | #2
From: David Miller [mailto:davem@davemloft.net]
Sent: Wednesday, December 10, 2014 7:55 PM

> Please text format your commit messages to 80 characters or less per line.
> 
> People are going to read your commits using text tools, not necessarily GUI
> tools which will auto-format your commit message.
> 
> I know this seems like we are being difficult, but you are making many
> fundamental mistakes in your efforts to merge in these changes.

Submitted v9 with reformatted commit messages. Thanks for your patience.
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diff mbox

Patch

diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
index 1508125..f119a67 100644
--- a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
+++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
@@ -171,10 +171,14 @@  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,
@@ -597,11 +601,15 @@  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) {
diff --git a/drivers/scsi/cxgbi/libcxgbi.h b/drivers/scsi/cxgbi/libcxgbi.h
index 2c7cb1c..aba1af7 100644
--- a/drivers/scsi/cxgbi/libcxgbi.h
+++ b/drivers/scsi/cxgbi/libcxgbi.h
@@ -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)));
 }