Rather than trying to create duplicate platform devices, check for
duplication up front.
Generally the kernel doesn't require uniqueness of the source IDs
other than for obtaining unique platform device names (and making log
message non-ambiguous) - therefore, it would be possible to simply
replace eventual duplicate IDs with kernel assigned ones.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
Cc: Huang Ying <ying.huang@xxxxxxxxx>
---
drivers/acpi/apei/hest.c | 11 +++++++++++
1 file changed, 11 insertions(+)
--- linux-2.6.37-rc5/drivers/acpi/apei/hest.c
+++ 2.6.37-rc5-acpi-hest-unique/drivers/acpi/apei/hest.c
@@ -139,6 +139,7 @@ static int hest_parse_ghes(struct acpi_h
{
struct platform_device *ghes_dev;
struct ghes_arr *ghes_arr = data;
+ unsigned int i;
int rc;
if (hest_hdr->type != ACPI_HEST_TYPE_GENERIC_ERROR)
@@ -146,6 +147,16 @@ static int hest_parse_ghes(struct acpi_h
if (!((struct acpi_hest_generic *)hest_hdr)->enabled)
return 0;
+ for (i = 0; i < ghes_arr->count; ++i) {
+ const struct acpi_hest_header *h;
+
+ h = *(void **)dev_get_platdata(&ghes_arr->ghes_devs[i]->dev);
+ if (hest_hdr->source_id == h->source_id) {
+ pr_warn("Duplicate generic error source ID %#x\n",
+ hest_hdr->source_id);
+ return -EEXIST;
+ }
+ }
ghes_dev = platform_device_alloc("GHES", hest_hdr->source_id);
if (!ghes_dev)
return -ENOMEM;
--
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