These changes are the raw update to qemu-2.6.

[kvmfornfv.git] / qemu / hw / net / pcnet.c

diff --git a/qemu/hw/net/pcnet.c b/qemu/hw/net/pcnet.c
index 3437376..198a01f 100644 (file)
--- a/qemu/hw/net/pcnet.c
+++ b/qemu/hw/net/pcnet.c
@@ -35,6 +35,7 @@
  * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR92C990.txt
  */
 
+#include "qemu/osdep.h"
 #include "hw/qdev.h"
 #include "net/net.h"
 #include "qemu/timer.h"
@@ -670,8 +671,7 @@ static inline hwaddr pcnet_rdra_addr(PCNetState *s, int idx)
 static inline int64_t pcnet_get_next_poll_time(PCNetState *s, int64_t current_time)
 {
     int64_t next_time = current_time +
-        muldiv64(65536 - (CSR_SPND(s) ? 0 : CSR_POLL(s)),
-                 get_ticks_per_sec(), 33000000L);
+                        (65536 - (CSR_SPND(s) ? 0 : CSR_POLL(s))) * 30;
     if (next_time <= current_time)
         next_time = current_time + 1;
     return next_time;
@@ -1065,6 +1065,12 @@ ssize_t pcnet_receive(NetClientState *nc, const uint8_t *buf, size_t size_)
             int pktcount = 0;
 
             if (!s->looptest) {
+                if (size > 4092) {
+#ifdef PCNET_DEBUG_RMD
+                    fprintf(stderr, "pcnet: truncates rx packet.\n");
+#endif
+                    size = 4092;
+                }
                 memcpy(src, buf, size);
                 /* no need to compute the CRC */
                 src[size] = 0;
@@ -1085,7 +1091,7 @@ ssize_t pcnet_receive(NetClientState *nc, const uint8_t *buf, size_t size_)
                 uint32_t fcs = ~0;
                 uint8_t *p = src;
 
-                while (p != &src[size-4])
+                while (p != &src[size])
                     CRC(fcs, *p++);
                 crc_err = (*(uint32_t *)p != htonl(fcs));
             }
@@ -1234,8 +1240,10 @@ static void pcnet_transmit(PCNetState *s)
         bcnt = 4096 - GET_FIELD(tmd.length, TMDL, BCNT);
 
         /* if multi-tmd packet outsizes s->buffer then skip it silently.
-           Note: this is not what real hw does */
-        if (s->xmit_pos + bcnt > sizeof(s->buffer)) {
+         * Note: this is not what real hw does.
+         * Last four bytes of s->buffer are used to store CRC FCS code.
+         */
+        if (s->xmit_pos + bcnt > sizeof(s->buffer) - 4) {
             s->xmit_pos = -1;
             goto txdone;
         }