drivers/net/wireless/p54/eeprom.c: Return -ENOMEM on memory allocation failure
Author: Julia Lawall <julia@diku.dk>
In this code, 0 is returned on memory allocation failure, even though other
failures return -ENOMEM or other similar values.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
//
@@
expression ret;
expression x,e1,e2,e3;
@@
ret = 0
... when != ret = e1
*x = \(kmalloc\|kcalloc\|kzalloc\)(...)
... when != ret = e2
if (x == NULL) { ... when != ret = e3
return ret;
}
//
Signed-off-by: Julia Lawall
Cc:
Acked-by: Christian Lamparter
Signed-off-by: John W. Linville
---
drivers/net/wireless/p54/eeprom.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/p54/eeprom.c b/drivers/net/wireless/p54/eeprom.c
index 8c05266..35b09aa 100644
--- a/drivers/net/wireless/p54/eeprom.c
+++ b/drivers/net/wireless/p54/eeprom.c
@@ -261,8 +261,10 @@ static int p54_generate_channel_lists(struct ieee80211_hw *dev)
list->max_entries = max_channel_num;
list->channels = kzalloc(sizeof(struct p54_channel_entry) *
max_channel_num, GFP_KERNEL);
- if (!list->channels)
+ if (!list->channels) {
+ ret = -ENOMEM;
goto free;
+ }
for (i = 0; i < max_channel_num; i++) {
if (i < priv->iq_autocal_len) { |
---
drivers/net/wireless/p54/eeprom.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/p54/eeprom.c b/drivers/net/wireless/p54/eeprom.c
index 8c05266..35b09aa 100644
--- a/drivers/net/wireless/p54/eeprom.c
+++ b/drivers/net/wireless/p54/eeprom.c
@@ -261,8 +261,10 @@ static int p54_generate_channel_lists(struct ieee80211_hw *dev)
list->max_entries = max_channel_num;
list->channels = kzalloc(sizeof(struct p54_channel_entry) *
max_channel_num, GFP_KERNEL);
- if (!list->channels)
+ if (!list->channels) {
+ ret = -ENOMEM;
goto free;
+ }
for (i = 0; i < max_channel_num; i++) {
if (i < priv->iq_autocal_len) {