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| author | John Kacur <jkacur@redhat.com> | 2012-04-27 12:48:46 +0200 |
|---|---|---|
| committer | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2016-02-13 00:36:32 +0100 |
| commit | 0632292f28b7cf63f1c34ee840427d58ec42588e (patch) | |
| tree | 504974f3254aa2badf312e4a7e381957fb639d4e | |
| parent | 0557da56808c23eed988f3575eb68933354c8896 (diff) | |
| download | rt-linux-0632292f28b7cf63f1c34ee840427d58ec42588e.tar.gz | |
scsi: qla2xxx: Use local_irq_save_nort() in qla2x00_poll
RT triggers the following:
[ 11.307652] [<ffffffff81077b27>] __might_sleep+0xe7/0x110
[ 11.307663] [<ffffffff8150e524>] rt_spin_lock+0x24/0x60
[ 11.307670] [<ffffffff8150da78>] ? rt_spin_lock_slowunlock+0x78/0x90
[ 11.307703] [<ffffffffa0272d83>] qla24xx_intr_handler+0x63/0x2d0 [qla2xxx]
[ 11.307736] [<ffffffffa0262307>] qla2x00_poll+0x67/0x90 [qla2xxx]
Function qla2x00_poll does local_irq_save() before calling qla24xx_intr_handler
which has a spinlock. Since spinlocks are sleepable on rt, it is not allowed
to call them with interrupts disabled. Therefore we use local_irq_save_nort()
instead which saves flags without disabling interrupts.
This fix needs to be applied to v3.0-rt, v3.2-rt and v3.4-rt
Suggested-by: Thomas Gleixner
Signed-off-by: John Kacur <jkacur@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: David Sommerseth <davids@redhat.com>
Link: http://lkml.kernel.org/r/1335523726-10024-1-git-send-email-jkacur@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_inline.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/qla2xxx/qla_inline.h b/drivers/scsi/qla2xxx/qla_inline.h index fee9eb7c8a600..b42d4adc42dca 100644 --- a/drivers/scsi/qla2xxx/qla_inline.h +++ b/drivers/scsi/qla2xxx/qla_inline.h @@ -59,12 +59,12 @@ qla2x00_poll(struct rsp_que *rsp) { unsigned long flags; struct qla_hw_data *ha = rsp->hw; - local_irq_save(flags); + local_irq_save_nort(flags); if (IS_P3P_TYPE(ha)) qla82xx_poll(0, rsp); else ha->isp_ops->intr_handler(0, rsp); - local_irq_restore(flags); + local_irq_restore_nort(flags); } static inline uint8_t * |