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[SCSI] mptspi: fix oops in mptspi_dv_renegotiate_work()

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The problem here is that if the ioc faults too early in the bring up
sequence (as it usually does for an irq routing problem), ioc_reset gets
called before the scsi host is even allocated.  This causes an oops when
it later schedules a renegotiation.  Fix this by checking ioc->sh before
trying to renegotiate.

Cc: "Moore, Eric" <Eric.Moore@lsi.com>
Cc: Stable Tree <stable@kernel.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
James Bottomley 2008-07-07 11:24:06 -05:00
parent bdb2b8cab4
commit 081a5bcb39
1 changed files with 7 additions and 2 deletions
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9
drivers/message/fusion/mptspi.c
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@ -1266,13 +1266,18 @@ mptspi_dv_renegotiate(struct _MPT_SCSI_HOST *hd)
static int
mptspi_ioc_reset(MPT_ADAPTER *ioc, int reset_phase)
{
struct _MPT_SCSI_HOST *hd = shost_priv(ioc->sh);
int rc;
rc = mptscsih_ioc_reset(ioc, reset_phase);
if (reset_phase == MPT_IOC_POST_RESET)
/* only try to do a renegotiation if we're properly set up
* if we get an ioc fault on bringup, ioc->sh will be NULL */
if (reset_phase == MPT_IOC_POST_RESET &&
ioc->sh) {
struct _MPT_SCSI_HOST *hd = shost_priv(ioc->sh);
mptspi_dv_renegotiate(hd);
}
return rc;
}