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APEI: GHES: correctly return NULL for ghes_get_devices()

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Since 315bada690 ("EDAC: Check for GHES preference in the
chipset-specific EDAC drivers"), vendor specific EDAC driver will not
probe correctly when CONFIG_ACPI_APEI_GHES is enabled but no GHES device
is present.  Make ghes_get_devices() return NULL when the GHES device
list is empty to fix the problem.

Fixes: 9057a3f7ac ("EDAC/ghes: Prepare to make ghes_edac a proper module")
Signed-off-by: Li Yang <leoyang.li@nxp.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Li Yang 2023-05-19 15:12:49 -05:00 committed by Rafael J. Wysocki
parent d38f6bcea8
commit 9368aa1882
1 changed files with 2 additions and 0 deletions
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2
drivers/acpi/apei/ghes.c
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@ -1542,6 +1542,8 @@ struct list_head *ghes_get_devices(void)
pr_warn_once("Force-loading ghes_edac on an unsupported platform. You're on your own!\n");
}
} else if (list_empty(&ghes_devs)) {
return NULL;
}
return &ghes_devs;