1 files changed, 13 insertions, 14 deletions

diff --git a/drivers/infiniband/hw/nes/nes_verbs.c b/drivers/infiniband/hw/nes/nes_verbs.c
index 9279d056185..f04bb1a5da4 100644
--- a/drivers/infiniband/hw/nes/nes_verbs.c
+++ b/drivers/infiniband/hw/nes/nes_verbs.c
@@ -2122,6 +2122,7 @@ static struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd,
         struct nes_root_vpbl root_vpbl;
         u32 stag;
         u32 i;
+        unsigned long mask;
         u32 stag_index = 0;
         u32 next_stag_index = 0;
         u32 driver_key = 0;
@@ -2150,6 +2151,9 @@ static struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd,
                 return ERR_PTR(-E2BIG);
         }
 
+        if ((buffer_list[0].addr ^ *iova_start) & ~PAGE_MASK)
+                return ERR_PTR(-EINVAL);
+
         err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs, nesadapter->max_mr,
                         &stag_index, &next_stag_index);
         if (err) {
@@ -2215,19 +2219,16 @@ static struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd,
                         root_pbl_index++;
                         cur_pbl_index = 0;
                 }
-                if (buffer_list[i].addr & ~PAGE_MASK) {
-                        /* TODO: Unwind allocated buffers */
-                        nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
-                        nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
-                                        (unsigned int) buffer_list[i].addr);
-                        ibmr = ERR_PTR(-EINVAL);
-                        kfree(nesmr);
-                        goto reg_phys_err;
-                }
 
-                if (!buffer_list[i].size) {
+                mask = !buffer_list[i].size;
+                if (i != 0)
+                        mask |= buffer_list[i].addr;
+                if (i != num_phys_buf - 1)
+                        mask |= buffer_list[i].addr + buffer_list[i].size;
+
+                if (mask & ~PAGE_MASK) {
                         nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
-                        nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
+                        nes_debug(NES_DBG_MR, "Invalid buffer addr or size\n");
                         ibmr = ERR_PTR(-EINVAL);
                         kfree(nesmr);
                         goto reg_phys_err;
@@ -2238,7 +2239,7 @@ static struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd,
                         if ((buffer_list[i-1].addr+PAGE_SIZE) != buffer_list[i].addr)
                                 single_page = 0;
                 }
-                vpbl.pbl_vbase[cur_pbl_index].pa_low = cpu_to_le32((u32)buffer_list[i].addr);
+                vpbl.pbl_vbase[cur_pbl_index].pa_low = cpu_to_le32((u32)buffer_list[i].addr & PAGE_MASK);
                 vpbl.pbl_vbase[cur_pbl_index++].pa_high =
                                 cpu_to_le32((u32)((((u64)buffer_list[i].addr) >> 32)));
         }
@@ -2251,8 +2252,6 @@ static struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd,
                         " length = 0x%016lX, index = 0x%08X\n",
                         stag, (unsigned long)*iova_start, (unsigned long)region_length, stag_index);
 
-        region_length -= (*iova_start)&PAGE_MASK;
-
         /* Make the leaf PBL the root if only one PBL */
         if (root_pbl_index == 1) {
                 root_vpbl.pbl_pbase = vpbl.pbl_pbase;