Julia, We've submitted this patch upstream to scsi-misc already on Oct 15th (Dan Carpenter had flagged this). Here's the submission info (patch (01/12) or item #12 in the link below: http://marc.info/?l=linux-scsi&w=2&r=1&s=qla2xxx&q=b Thanks, Madhu -----Original Message----- From: linux-scsi-owner@xxxxxxxxxxxxxxx [mailto:linux-scsi-owner@xxxxxxxxxxxxxxx] On Behalf Of Julia Lawall Sent: Tuesday, October 19, 2010 2:44 AM To: Andrew Vasquez Cc: kernel-janitors@xxxxxxxxxxxxxxx; Linux Driver; James E.J. Bottomley; Grant Likely; linux-scsi@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; devicetree-discuss@xxxxxxxxxxxxxxxx Subject: [PATCH 1/4] drivers/scsi/qla2xxx/qla_init.c: convert nested spin_lock_irqsave to spin_lock From: Julia Lawall <julia@xxxxxxx> If spin_lock_irqsave is called twice in a row with the same second argument, the interrupt state at the point of the second call overwrites the value saved by the first call. Indeed, the second call does not need to save the interrupt state, so it is changed to a simple spin_lock. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression lock1,lock2; expression flags; @@ *spin_lock_irqsave(lock1,flags) ... when != flags *spin_lock_irqsave(lock2,flags) // </smpl> Signed-off-by: Julia Lawall <julia@xxxxxxx> --- drivers/scsi/qla2xxx/qla_init.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index 3cafbef..c8d0b12 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -1818,14 +1818,14 @@ qla2x00_init_rings(scsi_qla_host_t *vha) qla2x00_init_response_q_entries(rsp); } - spin_lock_irqsave(&ha->vport_slock, flags); + spin_lock(&ha->vport_slock); /* Clear RSCN queue. */ list_for_each_entry(vp, &ha->vp_list, list) { vp->rscn_in_ptr = 0; vp->rscn_out_ptr = 0; } - spin_unlock_irqrestore(&ha->vport_slock, flags); + spin_unlock(&ha->vport_slock); ha->isp_ops->config_rings(vha); -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
