From 232792b6b43b1420324e432a0498602b9c8d5a8c Mon Sep 17 00:00:00 2001 From: Joe Lawrence Date: Tue, 26 Aug 2014 17:12:01 -0400 Subject: [PATCH] qla2xxx: Schedule board_disable only once There are various callers of qla2x00_check_reg{32,16}_for_disconnect that may schedule board removal on PCI-disconnect. Test-and-set a dedicated flag before scheduling board_disable so it is invoked only once. Signed-off-by: Joe Lawrence Acked-by: Chad Dupuis Signed-off-by: Christoph Hellwig --- drivers/scsi/qla2xxx/qla_def.h | 3 +++ drivers/scsi/qla2xxx/qla_isr.c | 14 ++++++++------ 2 files changed, 11 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index b64399153135..4267ec6f3258 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -3402,6 +3402,9 @@ typedef struct scsi_qla_host { #define FX00_CRITEMP_RECOVERY 25 #define FX00_HOST_INFO_RESEND 26 + unsigned long pci_flags; +#define PFLG_DISCONNECTED 0 /* PCI device removed */ + uint32_t device_flags; #define SWITCH_FOUND BIT_0 #define DFLG_NO_CABLE BIT_1 diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c index 016ebed880f5..fd75b9139693 100644 --- a/drivers/scsi/qla2xxx/qla_isr.c +++ b/drivers/scsi/qla2xxx/qla_isr.c @@ -117,12 +117,14 @@ qla2x00_check_reg32_for_disconnect(scsi_qla_host_t *vha, uint32_t reg) { /* Check for PCI disconnection */ if (reg == 0xffffffff) { - /* - * Schedule this on the default system workqueue so that all the - * adapter workqueues and the DPC thread can be shutdown - * cleanly. - */ - schedule_work(&vha->hw->board_disable); + if (!test_and_set_bit(PFLG_DISCONNECTED, &vha->pci_flags)) { + /* + * Schedule this (only once) on the default system + * workqueue so that all the adapter workqueues and the + * DPC thread can be shutdown cleanly. + */ + schedule_work(&vha->hw->board_disable); + } return true; } else return false;