Re: [PATCH 3/3] cxgb4i_v3: iscsi and libcxgbi library for handling common part

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On 05/27/2010 11:29 AM, Mike Christie wrote:

On 05/15/2010 12:24 PM, Rakesh Ranjan wrote:

quoted

From: Rakesh Ranjan<redacted>


Signed-off-by: Rakesh Ranjan<redacted>
---
  drivers/scsi/cxgb4i/cxgb4i_iscsi.c |  617
++++++++++++++++++++++++++++++++++++
  drivers/scsi/cxgb4i/libcxgbi.c     |  589
++++++++++++++++++++++++++++++++++
  drivers/scsi/cxgb4i/libcxgbi.h     |  430 +++++++++++++++++++++++++

I think the patch had some whitespace/newline issues. When I did git-am
I got:

warning: squelched 1 whitespace error
warning: 6 lines add whitespace errors.

I think James can just fix up when he merges with git, but in the future
you might want to try a git-am on your patch before you send (git-am
--whitespace=fix will fix it up for you).

quoted

+
+int cxgbi_pdu_init(struct cxgbi_device *cdev)
+{
+    if (cdev->skb_tx_headroom>  (512 * MAX_SKB_FRAGS))
+        cdev->skb_extra_headroom = cdev->skb_tx_headroom;
+    cdev->pad_page = alloc_page(GFP_KERNEL);
+    if (cdev->pad_page)
+        return -ENOMEM;
+    memset(page_address(cdev->pad_page), 0, PAGE_SIZE);
+    return 0;
+
+    /*
+    if (SKB_TX_HEADROOM>  (512 * MAX_SKB_FRAGS))
+        skb_extra_headroom = SKB_TX_HEADROOM;
+    pad_page = alloc_page(GFP_KERNEL);
+    if (!pad_page)
+        return -ENOMEM;
+    memset(page_address(pad_page), 0, PAGE_SIZE);
+    return 0;*/

Clean this up.

quoted

+
+void cxgbi_release_itt(struct iscsi_task *task, itt_t hdr_itt)
+{
+    struct scsi_cmnd *sc = task->sc;
+    struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data;
+    struct cxgbi_conn *cconn = tcp_conn->dd_data;
+    struct cxgbi_device *cdev = cconn->chba->cdev;
+    struct cxgbi_tag_format *tformat =&cdev->tag_format;
+    u32 tag = ntohl((__force u32)hdr_itt);
+
+    cxgbi_tag_debug("release tag 0x%x.\n", tag);
+
+    if (sc&&
+        (scsi_bidi_cmnd(sc) ||
+         sc->sc_data_direction == DMA_FROM_DEVICE)&&
+            cxgbi_is_ddp_tag(tformat, tag))

The formatting is a little weird. I think you want each line to start in
the same column instead of each getting tabbed over.

quoted

+
+
+int cxgbi_reserve_itt(struct iscsi_task *task, itt_t *hdr_itt)
+{
+    struct scsi_cmnd *sc = task->sc;
+    struct iscsi_conn *conn = task->conn;
+    struct iscsi_session *sess = conn->session;
+    struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
+    struct cxgbi_conn *cconn = tcp_conn->dd_data;
+    struct cxgbi_device *cdev = cconn->chba->cdev;
+    struct cxgbi_tag_format *tformat =&cdev->tag_format;
+    u32 sw_tag = (sess->age<<  cconn->task_idx_bits) | task->itt;
+    u32 tag;
+    int err = -EINVAL;
+
+    if (sc&&
+        (scsi_bidi_cmnd(sc) ||
+         sc->sc_data_direction == DMA_FROM_DEVICE)&&
+            cxgbi_sw_tag_usable(tformat, sw_tag)) {

Same tabbing.

quoted

+    volatile unsigned int state;

I did not get why this needed to be volatile (I see it is like this in
cxgb3i and I did not see why in there too).

quoted

+
+static inline void cxgbi_sock_hold(struct cxgbi_sock *csk)
+{
+    atomic_inc(&csk->refcnt);

We want people to use krefs instead of their own refcounting now.

quoted

+
+static inline void *cplhdr(struct sk_buff *skb)
+{
+    return skb->data;
+}

Seems kinda useless.

Hi Mike,

Thanks for the review, will send you the updated patch.

Regards
Rakesh Ranjan

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