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ucc_geth: fixes for ucc_geth_memclean 

The ucc_geth_memclean function can be called before the Tx BD rings, Rx
BD rings and associated socket buffers are allocated (for example if
ucc_fast_init fails). The current code doesn't check if p_tx_bd_ring[i]
is null, generating a kernel panic when trying to free the associated
socket buffers.

The function can also fail when accessing the uninitialized list_head
structures ugeth->group_hash_q and ugeth->ind_hash_q. In the current
implementation the list heads are initialized only when
maxGroupAddrInHash and maxIndAddrInHash are positive values, although I
think it's better to always initialize them.

Signed-off-by: Ionut Nicu <ionut.nicu@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Nicu Ioan Petru 2007-04-13 01:26:29 -05:00 committed by Jeff Garzik
parent d5b9049df2
commit 3a8205ead4
1 changed files with 6 additions and 7 deletions
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13
drivers/net/ucc_geth.c
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@ -2133,6 +2133,8 @@ static void ucc_geth_memclean(struct ucc_geth_private *ugeth)
}
for (i = 0; i < ugeth->ug_info->numQueuesTx; i++) {
bd = ugeth->p_tx_bd_ring[i];
if (!bd)
continue;
for (j = 0; j < ugeth->ug_info->bdRingLenTx[i]; j++) {
if (ugeth->tx_skbuff[i][j]) {
dma_unmap_single(NULL,
@ -2300,6 +2302,10 @@ static int ucc_struct_init(struct ucc_geth_private *ugeth)
ug_info = ugeth->ug_info;
uf_info = &ug_info->uf_info;
/* Create CQs for hash tables */
INIT_LIST_HEAD(&ugeth->group_hash_q);
INIT_LIST_HEAD(&ugeth->ind_hash_q);
if (!((uf_info->bd_mem_part == MEM_PART_SYSTEM) ||
(uf_info->bd_mem_part == MEM_PART_MURAM))) {
ugeth_err("%s: Bad memory partition value.", __FUNCTION__);
@ -3132,13 +3138,6 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
for (j = 0; j < NUM_OF_PADDRS; j++)
ugeth_82xx_filtering_clear_addr_in_paddr(ugeth, (u8) j);
/* Create CQs for hash tables */
if (ug_info->maxGroupAddrInHash > 0) {
INIT_LIST_HEAD(&ugeth->group_hash_q);
}
if (ug_info->maxIndAddrInHash > 0) {
INIT_LIST_HEAD(&ugeth->ind_hash_q);
}
p_82xx_addr_filt =
(struct ucc_geth_82xx_address_filtering_pram *) ugeth->
p_rx_glbl_pram->addressfiltering;