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powerpc/kexec: Fix build failure from uninitialised variable

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commit 83ee9f23763a432a4077bf20624ee35de87bce99 upstream.

clang 14 won't build because ret is uninitialised and can be returned if
both prop and fdtprop are NULL.  Drop the ret variable and return an
error in that failure case.

Fixes: b1fc44eaa9ba ("pseries/iommu/ddw: Fix kdump to work in absence of ibm,dma-window")
Suggested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220810054331.373761-1-ruscur@russell.cc
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Russell Currey 2022-08-10 15:43:31 +10:00 committed by Greg Kroah-Hartman
parent 2f49bfbba3
commit ee57f8bba8
1 changed files with 5 additions and 5 deletions
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10
arch/powerpc/kexec/file_load_64.c
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@ -1043,17 +1043,17 @@ static int copy_property(void *fdt, int node_offset, const struct device_node *d
const char *propname)
{
const void *prop, *fdtprop;
int len = 0, fdtlen = 0, ret;
int len = 0, fdtlen = 0;
prop = of_get_property(dn, propname, &len);
fdtprop = fdt_getprop(fdt, node_offset, propname, &fdtlen);
if (fdtprop && !prop)
ret = fdt_delprop(fdt, node_offset, propname);
return fdt_delprop(fdt, node_offset, propname);
else if (prop)
ret = fdt_setprop(fdt, node_offset, propname, prop, len);
return ret;
return fdt_setprop(fdt, node_offset, propname, prop, len);
else
return -FDT_ERR_NOTFOUND;
}
static int update_pci_dma_nodes(void *fdt, const char *dmapropname)