Clean up parameters being passed to mtd

Some nand implementations are fussy about the parameters being passed in.

If the ptr or length of data or oob is zero, then clear out the whole
parameter pair.

Signed-off-by: Charles Manning <cdhmanning@gmail.com>

diff --git a/yaffs_mtdif_multi.c b/yaffs_mtdif_multi.c
index 265dd789eb02d55094277183adf7cf722ecfd092..fe91a9eb3d97f35d08552ba59d5c7c9958999328 100644 (file)
--- a/yaffs_mtdif_multi.c
+++ b/yaffs_mtdif_multi.c
@@ -78,6 +78,20 @@ static       int yaffs_mtd_write(struct yaffs_dev *dev, int nand_chunk,
        struct mtd_oob_ops ops;
        int retval;
 
        struct mtd_oob_ops ops;
        int retval;
 

+       yaffs_trace(YAFFS_TRACE_MTD,
+                       "yaffs_mtd_write(%p, %d, %p, %d, %p, %d)\n",
+                       dev, nand_chunk, data, data_len, oob, oob_len);
+
+       if (!data || !data_len) {
+               data = NULL;
+               data_len = 0;
+       }
+
+       if (!oob || !oob_len) {
+               oob = NULL;
+               oob_len = 0;
+       }
+

        addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
        memset(&ops, 0, sizeof(ops));
        ops.mode = MTD_OPS_AUTO_OOB;
        addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
        memset(&ops, 0, sizeof(ops));
        ops.mode = MTD_OPS_AUTO_OOB;