From feccada972756b959e21d450e75f91907e53e9e1 Mon Sep 17 00:00:00 2001 From: "wenxiong@linux.vnet.ibm.com" Date: Fri, 24 May 2013 09:59:13 -0500 Subject: [PATCH] [SCSI] ipr: possible irq lock inversion dependency detected When enable lockdep, seeing "possible irq lock inversion dependency detected" error. This patch fixes the issue. Signed-off-by: Wen Xiong Acked-by: Brian King Signed-off-by: James Bottomley --- drivers/scsi/ipr.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index 6c4cedb44c07..a87767f73913 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -9392,7 +9392,7 @@ static int ipr_probe_ioa(struct pci_dev *pdev, void __iomem *ipr_regs; int rc = PCIBIOS_SUCCESSFUL; volatile u32 mask, uproc, interrupts; - unsigned long lock_flags; + unsigned long lock_flags, driver_lock_flags; ENTER; @@ -9615,9 +9615,9 @@ static int ipr_probe_ioa(struct pci_dev *pdev, } else ioa_cfg->reset = ipr_reset_start_bist; - spin_lock(&ipr_driver_lock); + spin_lock_irqsave(&ipr_driver_lock, driver_lock_flags); list_add_tail(&ioa_cfg->queue, &ipr_ioa_head); - spin_unlock(&ipr_driver_lock); + spin_unlock_irqrestore(&ipr_driver_lock, driver_lock_flags); LEAVE; out: @@ -9700,6 +9700,7 @@ static void __ipr_remove(struct pci_dev *pdev) unsigned long host_lock_flags = 0; struct ipr_ioa_cfg *ioa_cfg = pci_get_drvdata(pdev); int i; + unsigned long driver_lock_flags; ENTER; spin_lock_irqsave(ioa_cfg->host->host_lock, host_lock_flags); @@ -9723,9 +9724,9 @@ static void __ipr_remove(struct pci_dev *pdev) INIT_LIST_HEAD(&ioa_cfg->used_res_q); spin_lock_irqsave(ioa_cfg->host->host_lock, host_lock_flags); - spin_lock(&ipr_driver_lock); + spin_lock_irqsave(&ipr_driver_lock, driver_lock_flags); list_del(&ioa_cfg->queue); - spin_unlock(&ipr_driver_lock); + spin_unlock_irqrestore(&ipr_driver_lock, driver_lock_flags); if (ioa_cfg->sdt_state == ABORT_DUMP) ioa_cfg->sdt_state = WAIT_FOR_DUMP; @@ -9991,12 +9992,12 @@ static int ipr_halt(struct notifier_block *nb, ulong event, void *buf) { struct ipr_cmnd *ipr_cmd; struct ipr_ioa_cfg *ioa_cfg; - unsigned long flags = 0; + unsigned long flags = 0, driver_lock_flags; if (event != SYS_RESTART && event != SYS_HALT && event != SYS_POWER_OFF) return NOTIFY_DONE; - spin_lock(&ipr_driver_lock); + spin_lock_irqsave(&ipr_driver_lock, driver_lock_flags); list_for_each_entry(ioa_cfg, &ipr_ioa_head, queue) { spin_lock_irqsave(ioa_cfg->host->host_lock, flags); @@ -10014,7 +10015,7 @@ static int ipr_halt(struct notifier_block *nb, ulong event, void *buf) ipr_do_req(ipr_cmd, ipr_halt_done, ipr_timeout, IPR_DEVICE_RESET_TIMEOUT); spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags); } - spin_unlock(&ipr_driver_lock); + spin_unlock_irqrestore(&ipr_driver_lock, driver_lock_flags); return NOTIFY_OK; } -- 2.20.1