linux-kernel - [RFC PATCH 1/4] spi: spi-fsl-spi: remove always-true conditional in fsl_spi_do_one

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: <20190327143040.16013-2-rasmus.villemoes@prevas.dk>
Date:   Wed, 27 Mar 2019 14:30:50 +0000
From:   Rasmus Villemoes <rasmus.villemoes@...vas.dk>
To:     Mark Brown <broonie@...nel.org>,
        "linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Fabio Estevam <festevam@...il.com>,
        Rasmus Villemoes <Rasmus.Villemoes@...vas.se>
Subject: [RFC PATCH 1/4] spi: spi-fsl-spi: remove always-true conditional in
 fsl_spi_do_one_msg

__spi_validate() in the generic SPI code sets ->speed_hz and
->bits_per_word to non-zero values, so this condition is always true.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@...vas.dk>
---
This of course relies on no spi_message reaching
->transfer_one_message without having been through __spi_validate. I
believe that's ok.

 drivers/spi/spi-fsl-spi.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c
index 3d7b50c65f36..6d114daa178a 100644
--- a/drivers/spi/spi-fsl-spi.c
+++ b/drivers/spi/spi-fsl-spi.c
@@ -384,12 +384,10 @@ static int fsl_spi_do_one_msg(struct spi_master *master,
 	cs_change = 1;
 	status = -EINVAL;
 	list_for_each_entry(t, &m->transfers, transfer_list) {
-		if (t->bits_per_word || t->speed_hz) {
-			if (cs_change)
-				status = fsl_spi_setup_transfer(spi, t);
-			if (status < 0)
-				break;
-		}
+		if (cs_change)
+			status = fsl_spi_setup_transfer(spi, t);
+		if (status < 0)
+			break;
 
 		if (cs_change) {
 			fsl_spi_chipselect(spi, BITBANG_CS_ACTIVE);
-- 
2.20.1