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path: root/net/bridge/br_stp_bpdu.c
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Diffstat (limited to 'net/bridge/br_stp_bpdu.c')
-rw-r--r--net/bridge/br_stp_bpdu.c17
1 files changed, 8 insertions, 9 deletions
diff --git a/net/bridge/br_stp_bpdu.c b/net/bridge/br_stp_bpdu.c
index 296f6a487c52..c3da01cc6a6f 100644
--- a/net/bridge/br_stp_bpdu.c
+++ b/net/bridge/br_stp_bpdu.c
@@ -19,8 +19,7 @@
#include "br_private.h"
#include "br_private_stp.h"
-#define JIFFIES_TO_TICKS(j) (((j) << 8) / HZ)
-#define TICKS_TO_JIFFIES(j) (((j) * HZ) >> 8)
+#define STP_HZ 256
static void br_send_bpdu(struct net_bridge_port *p, unsigned char *data, int length)
{
@@ -57,18 +56,18 @@ static void br_send_bpdu(struct net_bridge_port *p, unsigned char *data, int len
dev_queue_xmit);
}
-static __inline__ void br_set_ticks(unsigned char *dest, int jiff)
+static inline void br_set_ticks(unsigned char *dest, int j)
{
- __u16 ticks;
+ unsigned long ticks = (STP_HZ * j)/ HZ;
- ticks = JIFFIES_TO_TICKS(jiff);
- dest[0] = (ticks >> 8) & 0xFF;
- dest[1] = ticks & 0xFF;
+ *((__be16 *) dest) = htons(ticks);
}
-static __inline__ int br_get_ticks(unsigned char *dest)
+static inline int br_get_ticks(const unsigned char *src)
{
- return TICKS_TO_JIFFIES((dest[0] << 8) | dest[1]);
+ unsigned long ticks = ntohs(*(__be16 *)src);
+
+ return (ticks * HZ + STP_HZ - 1) / STP_HZ;
}
/* called under bridge lock */