From: Nishanth Aravamudan Subject: [KJ] [PATCH 13/14] scsi/qla2xxx: use msleep{, interruptible}() instead of schedule_timeout() From: Nishanth Aravamudan Replace schedule_timeout() with msleep()/msleep_interruptible() as appropriate, to guarantee the task delays as expected. Patch is compile-tested. Signed-off-by: Nishanth Aravamudan --- qla_os.c | 25 +++++++++++-------------- 1 files changed, 11 insertions(+), 14 deletions(-) Index: quilt/drivers/scsi/qla2xxx/qla_os.c =================================================================== --- quilt.orig/drivers/scsi/qla2xxx/qla_os.c +++ quilt/drivers/scsi/qla2xxx/qla_os.c @@ -487,14 +487,13 @@ qc24_fail_command: static int qla2x00_eh_wait_on_command(scsi_qla_host_t *ha, struct scsi_cmnd *cmd) { -#define ABORT_POLLING_PERIOD HZ -#define ABORT_WAIT_ITER ((10 * HZ) / (ABORT_POLLING_PERIOD)) +#define ABORT_POLLING_PERIOD 1000 +#define ABORT_WAIT_ITER ((10 * 1000) / (ABORT_POLLING_PERIOD)) unsigned long wait_iter = ABORT_WAIT_ITER; int ret = QLA_SUCCESS; while (CMD_SP(cmd)) { - set_current_state(TASK_UNINTERRUPTIBLE); - schedule_timeout(ABORT_POLLING_PERIOD); + msleep(ABORT_POLLING_PERIOD); if (--wait_iter) break; @@ -1934,7 +1933,7 @@ qla2x00_mem_free(scsi_qla_host_t *ha) { struct list_head *fcpl, *fcptemp; fc_port_t *fcport; - unsigned long wtime;/* max wait time if mbx cmd is busy. */ + unsigned int wtime;/* max wait time if mbx cmd is busy. */ if (ha == NULL) { /* error */ @@ -1943,11 +1942,9 @@ qla2x00_mem_free(scsi_qla_host_t *ha) } /* Make sure all other threads are stopped. */ - wtime = 60 * HZ; - while (ha->dpc_wait && wtime) { - set_current_state(TASK_INTERRUPTIBLE); - wtime = schedule_timeout(wtime); - } + wtime = 60 * 1000; + while (ha->dpc_wait && wtime) + wtime = msleep_interruptible(wtime); /* free ioctl memory */ qla2x00_free_ioctl_mem(ha); @@ -2478,15 +2475,15 @@ qla2x00_timer(scsi_qla_host_t *ha) int qla2x00_down_timeout(struct semaphore *sema, unsigned long timeout) { - const unsigned int step = HZ/10; + const unsigned int step = 100; /* msecs */ + unsigned int iterations = jiffies_to_msecs(timeout)/100; do { if (!down_trylock(sema)) return 0; - set_current_state(TASK_INTERRUPTIBLE); - if (schedule_timeout(step)) + if (msleep_interruptible(step)) break; - } while ((timeout -= step) > 0); + } while (--iterations >= 0); return -ETIMEDOUT; }