mtd: omap2: fix resource leak in prefetch-busy path
If prefetch engine is busy, current code "forgets" to call
dma_unmap_single(), which results in a deadlock later, so add it.
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index c2b0bba..ab56069 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -402,7 +402,7 @@
PREFETCH_FIFOTHRESHOLD_MAX, 0x1, len, is_write);
if (ret)
/* PFPW engine is busy, use cpu copy method */
- goto out_copy;
+ goto out_copy_unmap;
init_completion(&info->comp);
@@ -421,6 +421,8 @@
dma_unmap_single(&info->pdev->dev, dma_addr, len, dir);
return 0;
+out_copy_unmap:
+ dma_unmap_single(&info->pdev->dev, dma_addr, len, dir);
out_copy:
if (info->nand.options & NAND_BUSWIDTH_16)
is_write == 0 ? omap_read_buf16(mtd, (u_char *) addr, len)