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net: fujitsu: fix a potential NULL pointer dereference

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In case ioremap fails, the fix releases the pcmcia window and
returns -ENOMEM to avoid the NULL pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kangjie Lu 2019-03-12 02:16:21 -05:00 committed by David S. Miller
parent eb32cfcdef
commit 9f4d6358e1
1 changed files with 5 additions and 0 deletions
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5
drivers/net/ethernet/fujitsu/fmvj18x_cs.c
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@ -547,6 +547,11 @@ static int fmvj18x_get_hwinfo(struct pcmcia_device *link, u_char *node_id)
return -1; return -1;
base = ioremap(link->resource[2]->start, resource_size(link->resource[2])); base = ioremap(link->resource[2]->start, resource_size(link->resource[2]));
if (!base) {
pcmcia_release_window(link, link->resource[2]);
return -ENOMEM;
}
pcmcia_map_mem_page(link, link->resource[2], 0); pcmcia_map_mem_page(link, link->resource[2], 0);
/* /*