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Subject[PATCH] ata: fix sleep-while-holding-spinlock in sata_nv

From: Arjan van de Ven <arjan@linux.intel.com>
Subject: [PATCH] ata: fix sleep-while-holding-spinlock in sata_nv

blk_queue_bounce_limit() is a sleeping function, so reorganize
the code a little to not call it while holding a spinlock.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
---
drivers/ata/sata_nv.c | 8 +++++---
1 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 858f706..a7bc56d 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -671,6 +671,11 @@ static int nv_adma_slave_config(struct scsi_device *sdev)
port1 = ap->host->ports[1]->private_data;
sdev0 = ap->host->ports[0]->link.device[0].sdev;
sdev1 = ap->host->ports[1]->link.device[0].sdev;
+
+ blk_queue_segment_boundary(sdev->request_queue, segment_boundary);
+ blk_queue_max_hw_segments(sdev->request_queue, sg_tablesize);
+ spin_unlock_irqrestore(ap->lock, flags);
+
if ((port0->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) ||
(port1->flags & NV_ADMA_ATAPI_SETUP_COMPLETE)) {
/** We have to set the DMA mask to 32-bit if either port is in
@@ -701,14 +706,11 @@ static int nv_adma_slave_config(struct scsi_device *sdev)
pp->adma_dma_mask);
}

- blk_queue_segment_boundary(sdev->request_queue, segment_boundary);
- blk_queue_max_hw_segments(sdev->request_queue, sg_tablesize);
ata_port_printk(ap, KERN_INFO,
"DMA mask 0x%llX, segment boundary 0x%lX, hw segs %hu\n",
(unsigned long long)*ap->host->dev->dma_mask,
segment_boundary, sg_tablesize);

- spin_unlock_irqrestore(ap->lock, flags);

return rc;
}
--
1.5.4.5


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