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powerpc/eeh: Stop using do_gettimeofday() 

This interface is inefficient and deprecated because of the y2038
overflow.

ktime_get_seconds() is an appropriate replacement here, since it
has sufficient granularity but is more efficient and uses monotonic
time.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Acked-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Arnd Bergmann 2017-11-04 22:26:52 +01:00 committed by Michael Ellerman
parent cbb55eeb49
commit edfd17ff39
3 changed files with 6 additions and 6 deletions
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2
arch/powerpc/include/asm/eeh.h
View File

@ -93,7 +93,7 @@ struct eeh_pe {
struct pci_bus *bus; /* Top PCI bus for bus PE */
int check_count; /* Times of ignored error */
int freeze_count; /* Times of froze up */
struct timeval tstamp; /* Time on first-time freeze */
time64_t tstamp; /* Time on first-time freeze */
int false_positives; /* Times of reported #ff's */
atomic_t pass_dev_cnt; /* Count of passed through devs */
struct eeh_pe *parent; /* Parent PE */

2
arch/powerpc/kernel/eeh_driver.c
View File

@ -623,7 +623,7 @@ static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus,
struct eeh_rmv_data *rmv_data)
{
struct pci_bus *frozen_bus = eeh_pe_bus_get(pe);
struct timeval tstamp;
time64_t tstamp;
int cnt, rc;
struct eeh_dev *edev;

8
arch/powerpc/kernel/eeh_pe.c
View File

@ -526,16 +526,16 @@ int eeh_rmv_from_parent_pe(struct eeh_dev *edev)
*/
void eeh_pe_update_time_stamp(struct eeh_pe *pe)
{
struct timeval tstamp;
time64_t tstamp;
if (!pe) return;
if (pe->freeze_count <= 0) {
pe->freeze_count = 0;
do_gettimeofday(&pe->tstamp);
pe->tstamp = ktime_get_seconds();
} else {
do_gettimeofday(&tstamp);
if (tstamp.tv_sec - pe->tstamp.tv_sec > 3600) {
tstamp = ktime_get_seconds();
if (tstamp - pe->tstamp > 3600) {
pe->tstamp = tstamp;
pe->freeze_count = 0;
}