From c71c30dcba142f16bc5f651812b1bc0b9f70f02d Mon Sep 17 00:00:00 2001 From: Bryan O'Sullivan Date: Mon, 24 Apr 2006 14:23:03 -0700 Subject: 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 Signed-off-by: Roland Dreier --- drivers/infiniband/hw/ipath/ipath_pe800.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/infiniband/hw/ipath/ipath_pe800.c') 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 " -- cgit v1.2.3-70-g09d2