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device_tree: qemu_fdt_getprop_cell converted to use the error API

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This patch aligns the prototype with qemu_fdt_getprop. The caller
can choose whether the function self-asserts on error (passing
&error_fatal as Error ** argument, corresponding to the legacy behavior),
or behaves differently such as simply output a message.

In this later case the caller can use the new lenp parameter to interpret
the error if any.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Eric Auger
2016-02-19 09:42:30 -07:00
committed by Alex Williamson
parent 78e24f235e
commit 58e71097ce
4 changed files with 35 additions and 12 deletions
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21
device_tree.c
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@@ -350,15 +350,22 @@ const void *qemu_fdt_getprop(void *fdt, const char *node_path,
}
uint32_t qemu_fdt_getprop_cell(void *fdt, const char *node_path,
const char *property)
const char *property, int *lenp, Error **errp)
{
int len;
const uint32_t *p = qemu_fdt_getprop(fdt, node_path, property, &len,
&error_fatal);
if (len != 4) {
error_report("%s: %s/%s not 4 bytes long (not a cell?)",
__func__, node_path, property);
exit(1);
const uint32_t *p;
if (!lenp) {
lenp = &len;
}
p = qemu_fdt_getprop(fdt, node_path, property, lenp, errp);
if (!p) {
return 0;
} else if (*lenp != 4) {
error_setg(errp, "%s: %s/%s not 4 bytes long (not a cell?)",
__func__, node_path, property);
*lenp = -EINVAL;
return 0;
}
return be32_to_cpu(*p);
}