lkml.org 
[lkml]   [2018]   [May]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH net-next] net: ethernet: ti: cpsw-phy-sel: check bus_find_device() ret value
Date
This fixes klockworks warnings: Pointer 'dev' returned from call to
function 'bus_find_device' at line 179 may be NULL and will be dereferenced
at line 181.

cpsw-phy-sel.c:179: 'dev' is assigned the return value from function 'bus_find_device'.
bus.c:342: 'bus_find_device' explicitly returns a NULL value.
cpsw-phy-sel.c:181: 'dev' is dereferenced by passing argument 1 to function 'dev_get_drvdata'.
device.h:1024: 'dev' is passed to function 'dev_get_drvdata'.
device.h:1026: 'dev' is explicitly dereferenced.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
[nsekhar@ti.com: add an error message, fix return path]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
---
it present for a very long time, so not critical.

drivers/net/ethernet/ti/cpsw-phy-sel.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ti/cpsw-phy-sel.c b/drivers/net/ethernet/ti/cpsw-phy-sel.c
index 1801364..005fd53 100644
--- a/drivers/net/ethernet/ti/cpsw-phy-sel.c
+++ b/drivers/net/ethernet/ti/cpsw-phy-sel.c
@@ -177,12 +177,19 @@ void cpsw_phy_sel(struct device *dev, phy_interface_t phy_mode, int slave)
}

dev = bus_find_device(&platform_bus_type, NULL, node, match);
- of_node_put(node);
+ if (!dev) {
+ dev_err(dev, "unable to find platform device for %s\n",
+ of_node_full_name(node));
+ goto out;
+ }
+
priv = dev_get_drvdata(dev);

priv->cpsw_phy_sel(priv, phy_mode, slave);

put_device(dev);
+out:
+ of_node_put(node);
}
EXPORT_SYMBOL_GPL(cpsw_phy_sel);

--
2.10.5
\
 
 \ /
  Last update: 2018-05-16 01:03    [W:0.033 / U:1.076 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site