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  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]
Date:   Fri, 22 Mar 2019 12:12:25 +0100
From:   Greg Kroah-Hartman <>
Cc:     Greg Kroah-Hartman <>,, Dan Carpenter <>,
        Linus Walleij <>,
        Lee Jones <>,
        Sasha Levin <>
Subject: [PATCH 4.4 007/230] mfd: ab8500-core: Return zero in get_register_interruptible()

4.4-stable review patch.  If anyone has any objections, please let me know.


[ Upstream commit 10628e3ecf544fa2e4e24f8e112d95c37884dc98 ]

This function is supposed to return zero on success or negative error
codes on error.  Unfortunately, there is a bug so it sometimes returns
non-zero, positive numbers on success.

I noticed this bug during review and I can't test it.  It does appear
that the return is sometimes propogated back to _regmap_read() where all
non-zero returns are treated as failure so this may affect run time.

Fixes: 47c1697508f2 ("mfd: Align ab8500 with the abx500 interface")
Signed-off-by: Dan Carpenter <>
Reviewed-by: Linus Walleij <>
Signed-off-by: Lee Jones <>
Signed-off-by: Sasha Levin <>
 drivers/mfd/ab8500-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
index fefbe4cfa61dd..1263cfd8b4d2f 100644
--- a/drivers/mfd/ab8500-core.c
+++ b/drivers/mfd/ab8500-core.c
@@ -259,7 +259,7 @@ static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
 	dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret);
-	return ret;
+	return (ret < 0) ? ret : 0;
 static int ab8500_get_register(struct device *dev, u8 bank,

Powered by blists - more mailing lists