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nfp: handle page allocation failures

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page_address() does not handle NULL argument gracefully,
make sure we NULL-check the page pointer before passing it
to page_address().

Fixes: ecd63a0217 ("nfp: add XDP support in the driver")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2017-10-10 09:16:23 -07:00 • committed by David S. Miller
parent c3d64ad4fe
commit 5f0ca2fb71
1 changed files with 14 additions and 6 deletions
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20
drivers/net/ethernet/netronome/nfp/nfp_net_common.c
View file

@ -1180,10 +1180,14 @@ static void *nfp_net_rx_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr)
{ {
void *frag; void *frag;
if (!dp->xdp_prog) if (!dp->xdp_prog) {
frag = netdev_alloc_frag(dp->fl_bufsz); frag = netdev_alloc_frag(dp->fl_bufsz);
else } else {
frag = page_address(alloc_page(GFP_KERNEL | __GFP_COLD)); struct page *page;
page = alloc_page(GFP_KERNEL | __GFP_COLD);
frag = page ? page_address(page) : NULL;
}
if (!frag) { if (!frag) {
nn_dp_warn(dp, "Failed to alloc receive page frag\n"); nn_dp_warn(dp, "Failed to alloc receive page frag\n");
return NULL; return NULL;
@ -1203,10 +1207,14 @@ static void *nfp_net_napi_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr)
{ {
void *frag; void *frag;
if (!dp->xdp_prog) if (!dp->xdp_prog) {
frag = napi_alloc_frag(dp->fl_bufsz); frag = napi_alloc_frag(dp->fl_bufsz);
else } else {
frag = page_address(alloc_page(GFP_ATOMIC | __GFP_COLD)); struct page *page;
page = alloc_page(GFP_ATOMIC | __GFP_COLD);
frag = page ? page_address(page) : NULL;
}
if (!frag) { if (!frag) {
nn_dp_warn(dp, "Failed to alloc receive page frag\n"); nn_dp_warn(dp, "Failed to alloc receive page frag\n");
return NULL; return NULL;