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[IB] mthca: Round up number of slots in HCA context memory table

When allocating a table for mem-free HCA context, don't assume that
obj_size * nobj is an even multiple of MTHCA_TABLE_CHUNK_SIZE.  In
particular, make sure we allocate at least one slot even if the table
is smaller than MTHCA_TABLE_CHUNK_SIZE.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Michael S. Tsirkin пре 20 година
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f02b16bea2
1 измењених фајлова са 1 додато и 1 уклоњено
  1. 1 1
      drivers/infiniband/hw/mthca/mthca_memfree.c

+ 1 - 1
drivers/infiniband/hw/mthca/mthca_memfree.c

@@ -290,7 +290,7 @@ struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev,
 	int i;
 	u8 status;
 
-	num_icm = obj_size * nobj / MTHCA_TABLE_CHUNK_SIZE;
+	num_icm = (obj_size * nobj + MTHCA_TABLE_CHUNK_SIZE - 1) / MTHCA_TABLE_CHUNK_SIZE;
 
 	table = kmalloc(sizeof *table + num_icm * sizeof *table->icm, GFP_KERNEL);
 	if (!table)