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[pcnet32] Fix received packet corruption

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The pcnet32 driver mismanages its RX buffers, with the result that
packets get corrupted if more than one packet arrives between calls to
poll().

Originally-fixed-by: Bill Lortz <Bill.Lortz@premier.org>
Reviewed-by: Stefan Hajnoczi <stefanha@gmail.com>
Tested-by: Stefan Hajnoczi <stefanha@gmail.com>
This commit is contained in:
Michael Brown 2009-03-26 15:31:15 +00:00
parent 03ff8cd3e2
commit 5538a38b9c
1 changed files with 3 additions and 3 deletions
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6
src/drivers/net/pcnet32.c
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@ -216,8 +216,8 @@ struct {
__attribute__ ((aligned(16)));
struct pcnet32_rx_head rx_ring[RX_RING_SIZE]
__attribute__ ((aligned(16)));
unsigned char txb[PKT_BUF_SZ * TX_RING_SIZE];
unsigned char rxb[RX_RING_SIZE * PKT_BUF_SZ];
unsigned char txb[TX_RING_SIZE][PKT_BUF_SZ];
unsigned char rxb[RX_RING_SIZE][PKT_BUF_SZ];
} pcnet32_bufs __shared;
/* May need to be moved to mii.h */
@ -588,7 +588,7 @@ static void pcnet32_transmit(struct nic *nic __unused, const char *d, /* Destina
status = 0x8300;
/* point to the current txb incase multiple tx_rings are used */
ptxb = pcnet32_bufs.txb + (lp->cur_tx * PKT_BUF_SZ);
ptxb = pcnet32_bufs.txb[lp->cur_tx];
/* copy the packet to ring buffer */
memcpy(ptxb, d, ETH_ALEN); /* dst */