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macintosh/macio-adb: check the return value of ioremap()

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[ Upstream commit dbaa310573 ]

The function ioremap() in macio_init() can fail, so its return value
should be checked.

Fixes: 36874579db ("[PATCH] powerpc: macio-adb build fix")
Reported-by: Hacash Robot <hacashRobot@santino.com>
Signed-off-by: Xie Shaowen <studentxswpy@163.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220802074148.3213659-1-studentxswpy@163.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Xie Shaowen
2022-08-02 15:41:48 +08:00
committed by Greg Kroah-Hartman
parent 2ac0a7059b
commit 7fded04fbb
1 changed files with 4 additions and 0 deletions
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drivers/macintosh/macio-adb.c
+4
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@@ -106,6 +106,10 @@ int macio_init(void)
return -ENXIO; return -ENXIO;
} }
adb = ioremap(r.start, sizeof(struct adb_regs)); adb = ioremap(r.start, sizeof(struct adb_regs));
if (!adb) {
of_node_put(adbs);
return -ENOMEM;
}
out_8(&adb->ctrl.r, 0); out_8(&adb->ctrl.r, 0);
out_8(&adb->intr.r, 0); out_8(&adb->intr.r, 0);