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[SCSI] hpsa: fix dma unmap error in hpsa_passthru_ioctl
author
Stephen M. Cameron
<scameron@beardog.cce.hp.com>
Fri, 3 Jun 2011 14:57:29 +0000
(09:57 -0500)
committer
James Bottomley
<JBottomley@Parallels.com>
Wed, 29 Jun 2011 17:09:53 +0000
(12:09 -0500)
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
drivers/scsi/hpsa.c
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diff --git
a/drivers/scsi/hpsa.c
b/drivers/scsi/hpsa.c
index
c6c0434
..
a75122d
100644
(file)
--- a/
drivers/scsi/hpsa.c
+++ b/
drivers/scsi/hpsa.c
@@
-2580,7
+2580,8
@@
static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
c->SG[0].Ext = 0; /* we are not chaining*/
}
hpsa_scsi_do_simple_cmd_core(h, c);
- hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
+ if (iocommand.buf_size > 0)
+ hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
check_ioctl_unit_attention(h, c);
/* Copy the error information out */