linux-kernel - [PATCH 6/6] staging: kpc2000: kpc_spi: remove unnecessary cast in [read|write]

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <243b8c78084e46606e78bed26a575181648099fd.1559696611.git.gneukum1@gmail.com>
Date:   Wed,  5 Jun 2019 01:09:13 +0000
From:   Geordan Neukum <gneukum1@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Geordan Neukum <gneukum1@...il.com>,
        Mao Wenan <maowenan@...wei.com>,
        Jeremy Sowden <jeremy@...zel.net>, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 6/6] staging: kpc2000: kpc_spi: remove unnecessary cast in [read|write]_reg()

The kpc_spi driver unnecessarily casts from a (u64 __iomem *) to a (void
*) when invoking readq and writeq which both take a (void __iomem *) arg.
There is no need for this cast, and it actually harms us by discarding
the sparse cookie, __iomem. Make the driver stop performing this casting
operation.

Signed-off-by: Geordan Neukum <gneukum1@...il.com>
---
 drivers/staging/kpc2000/kpc2000_spi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/kpc2000/kpc2000_spi.c b/drivers/staging/kpc2000/kpc2000_spi.c
index 4f517afc6239..28132e9e260d 100644
--- a/drivers/staging/kpc2000/kpc2000_spi.c
+++ b/drivers/staging/kpc2000/kpc2000_spi.c
@@ -167,7 +167,7 @@ kp_spi_read_reg(struct kp_spi_controller_state *cs, int idx)
 	if ((idx == KP_SPI_REG_CONFIG) && (cs->conf_cache >= 0)){
 		return cs->conf_cache;
 	}
-	val = readq((void*)addr);
+	val = readq(addr);
 	return val;
 }
 
@@ -176,7 +176,7 @@ kp_spi_write_reg(struct kp_spi_controller_state *cs, int idx, u64 val)
 {
 	u64 __iomem *addr = cs->base;
 	addr += idx;
-	writeq(val, (void*)addr);
+	writeq(val, addr);
 	if (idx == KP_SPI_REG_CONFIG)
 		cs->conf_cache = val;
 }
-- 
2.21.0