macintosh/macio-adb: check the return value of ioremap()
[ Upstream commit dbaa3105736d4d73063ea0a3b01cd7fafce924e6 ]
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>
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parent
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@ -106,6 +106,10 @@ int macio_init(void)
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return -ENXIO;
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}
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adb = ioremap(r.start, sizeof(struct adb_regs));
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if (!adb) {
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of_node_put(adbs);
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return -ENOMEM;
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}
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out_8(&adb->ctrl.r, 0);
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out_8(&adb->intr.r, 0);
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