[PATCH] staging: kpc2000: replace assertion with recovery code

[Aditya Pakki]

In kpc_dma_transfer, if either priv or ldev is NULL, crashing the
process is excessive and is not needed. Instead of asserting, by
passing the error upstream, the error can be handled.

Signed-off-by: Aditya Pakki <pakki001 at umn.edu>
---
 drivers/staging/kpc2000/kpc_dma/fileops.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index cb52bd9a6d2f..1c4633267cc1 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -49,9 +49,11 @@ static int kpc_dma_transfer(struct dev_private_data *priv,
 	u64 dma_addr;
 	u64 user_ctl;
 
-	BUG_ON(priv == NULL);
+	if (!priv)
+		return -EINVAL;
 	ldev = priv->ldev;
-	BUG_ON(ldev == NULL);
+	if (!ldev)
+		return -EINVAL;
 
 	acd = kzalloc(sizeof(*acd), GFP_KERNEL);
 	if (!acd) {
-- 
2.20.1