diff options
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_intr.c | 15 | ||||
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_kernel.h | 10 | ||||
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_pe800.c | 4 |
3 files changed, 23 insertions, 6 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_intr.c b/drivers/infiniband/hw/ipath/ipath_intr.c index 0bcb428041f..8e3b95b2928 100644 --- a/drivers/infiniband/hw/ipath/ipath_intr.c +++ b/drivers/infiniband/hw/ipath/ipath_intr.c @@ -719,11 +719,24 @@ static void handle_rcv(struct ipath_devdata *dd, u32 istat) irqreturn_t ipath_intr(int irq, void *data, struct pt_regs *regs) { struct ipath_devdata *dd = data; - u32 istat = ipath_read_kreg32(dd, dd->ipath_kregs->kr_intstatus); + u32 istat; ipath_err_t estat = 0; static unsigned unexpected = 0; irqreturn_t ret; + if(!(dd->ipath_flags & IPATH_PRESENT)) { + /* this is mostly so we don't try to touch the chip while + * it is being reset */ + /* + * This return value is perhaps odd, but we do not want the + * interrupt core code to remove our interrupt handler + * because we don't appear to be handling an interrupt + * during a chip reset. + */ + return IRQ_HANDLED; + } + + istat = ipath_read_kreg32(dd, dd->ipath_kregs->kr_intstatus); if (unlikely(!istat)) { ipath_stats.sps_nullintr++; ret = IRQ_NONE; /* not our interrupt, or already handled */ diff --git a/drivers/infiniband/hw/ipath/ipath_kernel.h b/drivers/infiniband/hw/ipath/ipath_kernel.h index 0ce5f19c9d6..e6507f8115b 100644 --- a/drivers/infiniband/hw/ipath/ipath_kernel.h +++ b/drivers/infiniband/hw/ipath/ipath_kernel.h @@ -731,7 +731,7 @@ u64 ipath_read_kreg64_port(const struct ipath_devdata *, ipath_kreg, static inline u32 ipath_read_ureg32(const struct ipath_devdata *dd, ipath_ureg regno, int port) { - if (!dd->ipath_kregbase) + if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) return 0; return readl(regno + (u64 __iomem *) @@ -762,7 +762,7 @@ static inline void ipath_write_ureg(const struct ipath_devdata *dd, static inline u32 ipath_read_kreg32(const struct ipath_devdata *dd, ipath_kreg regno) { - if (!dd->ipath_kregbase) + if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) return -1; return readl((u32 __iomem *) & dd->ipath_kregbase[regno]); } @@ -770,7 +770,7 @@ static inline u32 ipath_read_kreg32(const struct ipath_devdata *dd, static inline u64 ipath_read_kreg64(const struct ipath_devdata *dd, ipath_kreg regno) { - if (!dd->ipath_kregbase) + if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) return -1; return readq(&dd->ipath_kregbase[regno]); @@ -786,7 +786,7 @@ static inline void ipath_write_kreg(const struct ipath_devdata *dd, static inline u64 ipath_read_creg(const struct ipath_devdata *dd, ipath_sreg regno) { - if (!dd->ipath_kregbase) + if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) return 0; return readq(regno + (u64 __iomem *) @@ -797,7 +797,7 @@ static inline u64 ipath_read_creg(const struct ipath_devdata *dd, static inline u32 ipath_read_creg32(const struct ipath_devdata *dd, ipath_sreg regno) { - if (!dd->ipath_kregbase) + if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) return 0; return readl(regno + (u64 __iomem *) (dd->ipath_cregbase + 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 " |