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ACPI fix for v4.14-rc3

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This fixes an APEI problem that may cause a reported error to be
 missed due to a race condition.
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Merge tag 'acpi-4.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI fix from Rafael Wysocki:
 "This fixes an APEI problem that may cause a reported error to be
  missed due to a race condition"

* tag 'acpi-4.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / APEI: clear error status before acknowledging the error
This commit is contained in:
Linus Torvalds 2017-09-28 14:38:30 -07:00
commit 770b782f55
1 changed files with 9 additions and 7 deletions
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16
drivers/acpi/apei/ghes.c
View file

@ -743,17 +743,19 @@ static int ghes_proc(struct ghes *ghes)
}
ghes_do_proc(ghes, ghes->estatus);
out:
ghes_clear_estatus(ghes);
if (rc == -ENOENT)
return rc;
/*
* GHESv2 type HEST entries introduce support for error acknowledgment,
* so only acknowledge the error if this support is present.
*/
if (is_hest_type_generic_v2(ghes)) {
rc = ghes_ack_error(ghes->generic_v2);
if (rc)
return rc;
}
out:
ghes_clear_estatus(ghes);
if (is_hest_type_generic_v2(ghes))
return ghes_ack_error(ghes->generic_v2);
return rc;
}