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powerpc/eeh: Introduce eeh_for_each_pe() 

Add a for_each-style macro for iterating through PEs without the
boilerplate required by a traversal function. eeh_pe_next() is now
exported, as it is now used directly in place.

Signed-off-by: Sam Bobroff <sbobroff@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Sam Bobroff 2018-05-25 13:11:35 +10:00 committed by Michael Ellerman
parent 30424e386a
commit 309ed3a715
2 changed files with 7 additions and 4 deletions
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4
arch/powerpc/include/asm/eeh.h
View File

@ -106,6 +106,9 @@ struct eeh_pe {
#define eeh_pe_for_each_dev(pe, edev, tmp) \
list_for_each_entry_safe(edev, tmp, &pe->edevs, list)
#define eeh_for_each_pe(root, pe) \
for (pe = root; pe; pe = eeh_pe_next(pe, root))
static inline bool eeh_pe_passed(struct eeh_pe *pe)
{
return pe ? !!atomic_read(&pe->pass_dev_cnt) : false;
@ -267,6 +270,7 @@ typedef void *(*eeh_pe_traverse_func)(struct eeh_pe *pe, void *flag);
void eeh_set_pe_aux_size(int size);
int eeh_phb_pe_create(struct pci_controller *phb);
struct eeh_pe *eeh_phb_pe_get(struct pci_controller *phb);
struct eeh_pe *eeh_pe_next(struct eeh_pe *pe, struct eeh_pe *root);
struct eeh_pe *eeh_pe_get(struct pci_controller *phb,
int pe_no, int config_addr);
int eeh_add_to_parent_pe(struct eeh_dev *edev);

7
arch/powerpc/kernel/eeh_pe.c
View File

@ -142,8 +142,7 @@ struct eeh_pe *eeh_phb_pe_get(struct pci_controller *phb)
* The function is used to retrieve the next PE in the
* hierarchy PE tree.
*/
static struct eeh_pe *eeh_pe_next(struct eeh_pe *pe,
struct eeh_pe *root)
struct eeh_pe *eeh_pe_next(struct eeh_pe *pe, struct eeh_pe *root)
{
struct list_head *next = pe->child_list.next;
@ -178,7 +177,7 @@ void *eeh_pe_traverse(struct eeh_pe *root,
struct eeh_pe *pe;
void *ret;
for (pe = root; pe; pe = eeh_pe_next(pe, root)) {
eeh_for_each_pe(root, pe) {
ret = fn(pe, flag);
if (ret) return ret;
}
@ -209,7 +208,7 @@ void *eeh_pe_dev_traverse(struct eeh_pe *root,
}
/* Traverse root PE */
for (pe = root; pe; pe = eeh_pe_next(pe, root)) {
eeh_for_each_pe(root, pe) {
eeh_pe_for_each_dev(pe, edev, tmp) {
ret = fn(edev, flag);
if (ret)