powerpc/eeh: Fix use of EEH_PE_KEEP on wrong field

eeh_add_to_parent_pe() sometimes removes the EEH_PE_KEEP flag, but it
incorrectly removes it from pe->type, instead of pe->state.

However, rather than clearing it from the correct field, remove it.
Inspection of the code shows that it can't ever have had any effect
(even if it had been cleared from the correct field), because the
field is never tested after it is cleared by the statement in
question.

The clear statement was added by commit 807a827d4e74 ("powerpc/eeh:
Keep PE during hotplug"), but it didn't explain why it was necessary.

Signed-off-by: Sam Bobroff <sbobroff@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/kernel/eeh_pe.c b/arch/powerpc/kernel/eeh_pe.c
index 1b238ecc553e2fc4d591daa3e6b995da981c2c27..210d239a9395077f63ec42148b3ce44a35fd6780 100644 (file)
--- a/arch/powerpc/kernel/eeh_pe.c
+++ b/arch/powerpc/kernel/eeh_pe.c
@@ -379,7 +379,7 @@ int eeh_add_to_parent_pe(struct eeh_dev *edev)
                while (parent) {
                        if (!(parent->type & EEH_PE_INVALID))
                                break;
-                       parent->type &= ~(EEH_PE_INVALID | EEH_PE_KEEP);
+                       parent->type &= ~EEH_PE_INVALID;
                        parent = parent->parent;
                }