Revert "net: fujitsu: fix a potential NULL pointer dereference"

stable inclusion
from stable-5.10.42
commit b67c3d74adc3f7f832f57c170234bbe1fc69c87c
bugzilla: 55093
CVE: NA

--------------------------------

[ Upstream commit 5f94eaa4 ]

This reverts commit 9f4d6358.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, this commit was found to be incorrect for the reasons
below, so it must be reverted.  It will be fixed up "correctly" in a
later kernel change.

The original change does not change any behavior as the caller of this
function onlyu checks for "== -1" as an error condition so this error is
not handled properly.  Remove this change and it will be fixed up
properly in a later commit.

Cc: Kangjie Lu <kjlu@umn.edu>
Cc: David S. Miller <davem@davemloft.net>
Reviewed-by: NDominik Brodowski <linux@dominikbrodowski.net>
Link: https://lore.kernel.org/r/20210503115736.2104747-15-gregkh@linuxfoundation.orgSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/net/ethernet/fujitsu/fmvj18x_cs.c

@@ -547,11 +547,6 @@ static int fmvj18x_get_hwinfo(struct pcmcia_device *link, u_char *node_id)
 	return -1;
 
     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);
 
     /*