diff options
| author | Bryan O'Sullivan <bos@pathscale.com> | 2006-04-24 14:23:03 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-05-01 12:14:16 -0700 |
| commit | c71c30dcba142f16bc5f651812b1bc0b9f70f02d (patch) | |
| tree | a6cb67f3b2c59d5eeb3638c859d983d9006c5a2d /drivers/infiniband/hw/ipath/ipath_pe800.c | |
| parent | fccea663643cedfa310c5254da30e1e35e09199b (diff) | |
IB/ipath: prevent hardware from being accessed during reset
The reset code now turns off the PRESENT flag during a reset, so that
other code won't attempt to access a device that's in mid-reset.
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_pe800.c')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_pe800.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_pe800.c b/drivers/infiniband/hw/ipath/ipath_pe800.c index e1dc4f75706..6318067ab5e 100644 --- a/drivers/infiniband/hw/ipath/ipath_pe800.c +++ b/drivers/infiniband/hw/ipath/ipath_pe800.c @@ -972,6 +972,8 @@ static int ipath_setup_pe_reset(struct ipath_devdata *dd) /* Use ERROR so it shows up in logs, etc. */ ipath_dev_err(dd, "Resetting PE-800 unit %u\n", dd->ipath_unit); + /* keep chip from being accessed in a few places */ + dd->ipath_flags &= ~(IPATH_INITTED|IPATH_PRESENT); val = dd->ipath_control | INFINIPATH_C_RESET; ipath_write_kreg(dd, dd->ipath_kregs->kr_control, val); mb(); @@ -997,6 +999,8 @@ static int ipath_setup_pe_reset(struct ipath_devdata *dd) if ((r = pci_enable_device(dd->pcidev))) ipath_dev_err(dd, "pci_enable_device failed after " "reset: %d\n", r); + /* whether it worked or not, mark as present, again */ + dd->ipath_flags |= IPATH_PRESENT; val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_revision); if (val == dd->ipath_revision) { ipath_cdbg(VERBOSE, "Got matching revision " |