IB/ipath: Clean up some comments

Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

6 files changed, 11 insertions, 13 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_driver.c b/drivers/infiniband/hw/ipath/ipath_driver.c
index 7c69090f6bd6..f130652cfaa3 100644
--- a/drivers/infiniband/hw/ipath/ipath_driver.c
+++ b/drivers/infiniband/hw/ipath/ipath_driver.c
@@ -1196,7 +1196,7 @@ reloop:
                                   be32_to_cpu(hdr->bth[0]) & 0xff);
                 else {
                         /*
-                         * error packet, type of error  unknown.
+                         * error packet, type of error unknown.
                          * Probably type 3, but we don't know, so don't
                          * even try to print the opcode, etc.
                          */
diff --git a/drivers/infiniband/hw/ipath/ipath_file_ops.c b/drivers/infiniband/hw/ipath/ipath_file_ops.c
index 2a75faf1d108..9e5714d68ee1 100644
--- a/drivers/infiniband/hw/ipath/ipath_file_ops.c
+++ b/drivers/infiniband/hw/ipath/ipath_file_ops.c
@@ -1050,11 +1050,6 @@ static int mmap_piobufs(struct vm_area_struct *vma,
 
         phys = dd->ipath_physaddr + piobufs;
 
-        /*
-         * Don't mark this as non-cached, or we don't get the
-         * write combining behavior we want on the PIO buffers!
-         */
-
 #if defined(__powerpc__)
         /* There isn't a generic way to specify writethrough mappings */
         pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
diff --git a/drivers/infiniband/hw/ipath/ipath_iba6110.c b/drivers/infiniband/hw/ipath/ipath_iba6110.c
index ce858797e299..dffb6826579a 100644
--- a/drivers/infiniband/hw/ipath/ipath_iba6110.c
+++ b/drivers/infiniband/hw/ipath/ipath_iba6110.c
@@ -1022,7 +1022,8 @@ static int ipath_setup_ht_config(struct ipath_devdata *dd,
         do {
                 u8 cap_type;
 
-                /* the HT capability type byte is 3 bytes after the
+                /*
+                 * The HT capability type byte is 3 bytes after the
                  * capability byte.
                  */
                 if (pci_read_config_byte(pdev, pos + 3, &cap_type)) {
diff --git a/drivers/infiniband/hw/ipath/ipath_iba6120.c b/drivers/infiniband/hw/ipath/ipath_iba6120.c
index 97ae11793973..66925b255ccd 100644
--- a/drivers/infiniband/hw/ipath/ipath_iba6120.c
+++ b/drivers/infiniband/hw/ipath/ipath_iba6120.c
@@ -535,7 +535,7 @@ static void ipath_pe_handle_hwerrors(struct ipath_devdata *dd, char *msg,
 
         if (hwerrs & INFINIPATH_HWE_SERDESPLLFAILED) {
                 /*
-                 * If it occurs, it is left masked since the eternal
+                 * If it occurs, it is left masked since the external
                  * interface is unused
                  */
                 dd->ipath_hwerrmask &= ~INFINIPATH_HWE_SERDESPLLFAILED;
diff --git a/drivers/infiniband/hw/ipath/ipath_keys.c b/drivers/infiniband/hw/ipath/ipath_keys.c
index 85a4aefc6c03..8f32b17a5eed 100644
--- a/drivers/infiniband/hw/ipath/ipath_keys.c
+++ b/drivers/infiniband/hw/ipath/ipath_keys.c
@@ -128,9 +128,8 @@ int ipath_lkey_ok(struct ipath_qp *qp, struct ipath_sge *isge,
         int ret;
 
         /*
-         * We use LKEY == zero to mean a physical kmalloc() address.
-         * This is a bit of a hack since we rely on dma_map_single()
-         * being reversible by calling bus_to_virt().
+         * We use LKEY == zero for kernel virtual addresses
+         * (see ipath_get_dma_mr and ipath_dma.c).
          */
         if (sge->lkey == 0) {
                 struct ipath_pd *pd = to_ipd(qp->ibqp.pd);
diff --git a/drivers/infiniband/hw/ipath/ipath_verbs.c b/drivers/infiniband/hw/ipath/ipath_verbs.c
index a2baa618daf2..904ff1571ba6 100644
--- a/drivers/infiniband/hw/ipath/ipath_verbs.c
+++ b/drivers/infiniband/hw/ipath/ipath_verbs.c
@@ -943,7 +943,7 @@ bail:
  * ipath_verbs_send - send a packet
  * @qp: the QP to send on
  * @hdr: the packet header
- * @hdrwords: the number of words in the header
+ * @hdrwords: the number of 32-bit words in the header
  * @ss: the SGE to send
  * @len: the length of the packet in bytes
  */
@@ -955,7 +955,10 @@ int ipath_verbs_send(struct ipath_qp *qp, struct ipath_ib_header *hdr,
         int ret;
         u32 dwords = (len + 3) >> 2;
 
-        /* +1 is for the qword padding of pbc */
+        /*
+         * Calculate the send buffer trigger address.
+         * The +1 counts for the pbc control dword following the pbc length.
+         */
         plen = hdrwords + dwords + 1;
 
         /* Drop non-VL15 packets if we are not in the active state */