linux-kernel - [PATCH 5/9] drivers/spi: Drop unnecessary null test

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>] [day] [month] [year] [list]

Date:	Tue, 3 Aug 2010 23:34:00 +0200 (CEST)
From:	Julia Lawall <julia@...u.dk>
To:	David Brownell <dbrownell@...rs.sourceforge.net>,
	Grant Likely <grant.likely@...retlab.ca>,
	spi-devel-general@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 5/9] drivers/spi: Drop unnecessary null test

From: Julia Lawall <julia@...u.dk>

list_for_each_entry binds its first argument to a non-null value, and thus
any null test on the value of that argument is superfluous.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
iterator I;
expression x,E;
@@

I(x,...) { <...
- (x != NULL) &&
  E
  ...> }
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 drivers/spi/orion_spi.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/orion_spi.c b/drivers/spi/orion_spi.c
index 3aea50d..0b677dc 100644
--- a/drivers/spi/orion_spi.c
+++ b/drivers/spi/orion_spi.c
@@ -404,7 +404,7 @@ static int orion_spi_transfer(struct spi_device *spi, struct spi_message *m)
 			goto msg_rejected;
 		}
 
-		if ((t != NULL) && t->bits_per_word)
+		if (t->bits_per_word)
 			bits_per_word = t->bits_per_word;
 
 		if ((bits_per_word != 8) && (bits_per_word != 16)) {
@@ -415,7 +415,7 @@ static int orion_spi_transfer(struct spi_device *spi, struct spi_message *m)
 			goto msg_rejected;
 		}
 		/*make sure buffer length is even when working in 16 bit mode*/
-		if ((t != NULL) && (t->bits_per_word == 16) && (t->len & 1)) {
+		if ((t->bits_per_word == 16) && (t->len & 1)) {
 			dev_err(&spi->dev,
 				"message rejected : "
 				"odd data length (%d) while in 16 bit mode\n",
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/