Hello.
On 09/13/2013 09:45 PM, Larry Finger wrote:
Smatch displays the following:
CHECK drivers/net/wireless/rtlwifi/usb.c
drivers/net/wireless/rtlwifi/usb.c:458 _rtl_usb_rx_process_agg() warn: assigning (-98) to unsigned variable 'stats.noise'
drivers/net/wireless/rtlwifi/usb.c:503 _rtl_usb_rx_process_noagg() warn: assigning (-98) to unsigned variable 'stats.noise'
drivers/net/wireless/rtlwifi/usb.c:596 _rtl_rx_get_padding() info: ignoring unreachable code.
drivers/net/wireless/rtlwifi/usb.c:596 _rtl_rx_get_padding() info: ignoring unreachable code.
The negative number to an unsigned quantity is fixed by adding 256 to -98
to get the equivalent negative number.
Signed-off-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
---
drivers/net/wireless/rtlwifi/usb.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/rtlwifi/usb.c b/drivers/net/wireless/rtlwifi/usb.c
index e56778c..9f3dcb8 100644
--- a/drivers/net/wireless/rtlwifi/usb.c
+++ b/drivers/net/wireless/rtlwifi/usb.c
[...]
@@ -582,12 +582,15 @@ static void _rtl_rx_work(unsigned long param)
static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
unsigned int len)
{
+#if NET_IP_ALIGN != 0
unsigned int padding = 0;
+#endif
/* make function no-op when possible */
- if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
+ if (NET_IP_ALIGN == 0 || len < sizeof(struct ieee80211_hdr))
Why this collateral and undocumented change? What does it achieve?
return 0;
WBR, Sergei
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