IB/iser: Add missing counter increment in iser_data_buf_aligned_len()

While adding sg chaining support to iSER, a "for" loop was replaced
with a "for_each_sg" loop. The "for" loop included the incrementation
of 2 variables. Only one of them is incremented in the current
"for_each_sg" loop. This caused iSER to think that all data is
unaligned, and all data was copied to aligned buffers.

This patch increments the missing counter inside the "for_each_sg"
loop whenever necessary.

Signed-off-by: Erez Zilber <erezz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/ulp/iser/iser_memory.c b/drivers/infiniband/ulp/iser/iser_memory.c
index d687980..4a17743 100644 (file)
--- a/drivers/infiniband/ulp/iser/iser_memory.c
+++ b/drivers/infiniband/ulp/iser/iser_memory.c
@@ -310,13 +310,15 @@ static unsigned int iser_data_buf_aligned_len(struct iser_data_buf *data,
                if (i + 1 < data->dma_nents) {
                        next_addr = ib_sg_dma_address(ibdev, sg_next(sg));
                        /* are i, i+1 fragments of the same page? */
-                       if (end_addr == next_addr)
+                       if (end_addr == next_addr) {
+                               cnt++;
                                continue;
-                       else if (!IS_4K_ALIGNED(end_addr)) {
+                       } else if (!IS_4K_ALIGNED(end_addr)) {
                                ret_len = cnt + 1;
                                break;
                        }
                }
+               cnt++;
        }
        if (i == data->dma_nents)
                ret_len = cnt;  /* loop ended */