diff options
| author | Andrew Vasquez <andrew.vasquez@qlogic.com> | 2006-05-17 15:09:06 -0700 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-05-20 09:41:56 -0500 |
| commit | ffb39f0324b56bacaabac26133143cf861d0e9f9 (patch) | |
| tree | 3c4f1fd64e5199565637ff40b01228d3ec82a2fd /drivers/scsi | |
| parent | d1c61909c05ead100f855e640fba53925d0665ac (diff) | |
[SCSI] qla2xxx: ABBA lock ordering fix.
In qla2x00_reset_chip the driver first takes the hardware lock,
and then later on takes the mbx lock.
In the mailbox_command code.. it goes the other way around.
Discovered with the lock validator.
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_init.c | 15 |
1 files changed, 1 insertions, 14 deletions
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index 1cf27fe92f4..1289a18e7ad 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -411,7 +411,6 @@ qla2x00_reset_chip(scsi_qla_host_t *ha) unsigned long flags = 0; struct device_reg_2xxx __iomem *reg = &ha->iobase->isp; uint32_t cnt; - unsigned long mbx_flags = 0; uint16_t cmd; ha->isp_ops.disable_intrs(ha); @@ -519,20 +518,8 @@ qla2x00_reset_chip(scsi_qla_host_t *ha) if (IS_QLA2100(ha) || IS_QLA2200(ha) || IS_QLA2300(ha)) { for (cnt = 0; cnt < 30000; cnt++) { - if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) - spin_lock_irqsave(&ha->mbx_reg_lock, mbx_flags); - - if (RD_MAILBOX_REG(ha, reg, 0) != MBS_BUSY) { - if (!(test_bit(ABORT_ISP_ACTIVE, - &ha->dpc_flags))) - spin_unlock_irqrestore( - &ha->mbx_reg_lock, mbx_flags); + if (RD_MAILBOX_REG(ha, reg, 0) != MBS_BUSY) break; - } - - if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) - spin_unlock_irqrestore(&ha->mbx_reg_lock, - mbx_flags); udelay(100); } |