linux-kernel - [PATCH v2] staging: kpc2000: remove unnecessary assertion on priv

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Message-Id: <20191217225830.4018-1-pakki001@umn.edu>
Date:   Tue, 17 Dec 2019 16:58:24 -0600
From:   Aditya Pakki <pakki001@....edu>
To:     pakki001@....edu
Cc:     kjlu@....edu, Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Vandana BN <bnvandana@...il.com>,
        Simon Sandström <simon@...anor.nu>,
        Madhumitha Prabakaran <madhumithabiw@...il.com>,
        Matt Sickler <Matt.Sickler@...tronics.com>,
        Jeremy Sowden <jeremy@...zel.net>,
        Bharath Vedartham <linux.bhar@...il.com>,
        Harsh Jain <harshjain32@...il.com>, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] staging: kpc2000: remove unnecessary assertion on priv

In kpc_dma_transfer(), the assertion that priv is NULL is never
satisfied. The two callers of the function, dereference the priv
pointer before the call is executed. This patch removes the
unnecessary BUG_ON call.

Signed-off-by: Aditya Pakki <pakki001@....edu>
---
v1: Replace the recovery code by removing the assertion, as suggested
by Greg Kroah-Hartman.
---
 drivers/staging/kpc2000/kpc_dma/fileops.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c b/drivers/staging/kpc2000/kpc_dma/fileops.c
index cb52bd9a6d2f..61d762535823 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -49,7 +49,6 @@ static int kpc_dma_transfer(struct dev_private_data *priv,
 	u64 dma_addr;
 	u64 user_ctl;
 
-	BUG_ON(priv == NULL);
 	ldev = priv->ldev;
 	BUG_ON(ldev == NULL);
 
-- 
2.20.1