Before converting the dma channel to our private data structure, first
check that the channel is indeed one which our driver registered. ?We
do this by ensuring that the underlying device is bound to our driver.

This avoids potential oopses if we try to reference 'plchan->name'
against a foreign drivers dma channel.

Signed-off-by: Russell King <redacted>
---
?drivers/dma/amba-pl08x.c | ? 10 +++++++++-
?1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index be21e3f..91d4148 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c

@@ -92,6 +92,8 @@

?#define DRIVER_NAME ? ?"pl08xdmac"

+static struct amba_driver pl08x_amba_driver;
+