diff options
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_driver.c')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_driver.c | 49 |
1 files changed, 30 insertions, 19 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_driver.c b/drivers/infiniband/hw/ipath/ipath_driver.c index ad0aab60b05..69c0ce321b4 100644 --- a/drivers/infiniband/hw/ipath/ipath_driver.c +++ b/drivers/infiniband/hw/ipath/ipath_driver.c @@ -661,6 +661,8 @@ bail: static void __devexit cleanup_device(struct ipath_devdata *dd) { int port; + struct ipath_portdata **tmp; + unsigned long flags; if (*dd->ipath_statusp & IPATH_STATUS_CHIP_PRESENT) { /* can't do anything more with chip; needs re-init */ @@ -742,20 +744,21 @@ static void __devexit cleanup_device(struct ipath_devdata *dd) /* * free any resources still in use (usually just kernel ports) - * at unload; we do for portcnt, not cfgports, because cfgports - * could have changed while we were loaded. + * at unload; we do for portcnt, because that's what we allocate. + * We acquire lock to be really paranoid that ipath_pd isn't being + * accessed from some interrupt-related code (that should not happen, + * but best to be sure). */ + spin_lock_irqsave(&dd->ipath_uctxt_lock, flags); + tmp = dd->ipath_pd; + dd->ipath_pd = NULL; + spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags); for (port = 0; port < dd->ipath_portcnt; port++) { - struct ipath_portdata *pd = dd->ipath_pd[port]; - dd->ipath_pd[port] = NULL; + struct ipath_portdata *pd = tmp[port]; + tmp[port] = NULL; /* debugging paranoia */ ipath_free_pddata(dd, pd); } - kfree(dd->ipath_pd); - /* - * debuggability, in case some cleanup path tries to use it - * after this - */ - dd->ipath_pd = NULL; + kfree(tmp); } static void __devexit ipath_remove_one(struct pci_dev *pdev) @@ -2586,6 +2589,7 @@ int ipath_reset_device(int unit) { int ret, i; struct ipath_devdata *dd = ipath_lookup(unit); + unsigned long flags; if (!dd) { ret = -ENODEV; @@ -2611,18 +2615,21 @@ int ipath_reset_device(int unit) goto bail; } + spin_lock_irqsave(&dd->ipath_uctxt_lock, flags); if (dd->ipath_pd) for (i = 1; i < dd->ipath_cfgports; i++) { - if (dd->ipath_pd[i] && dd->ipath_pd[i]->port_cnt) { - ipath_dbg("unit %u port %d is in use " - "(PID %u cmd %s), can't reset\n", - unit, i, - pid_nr(dd->ipath_pd[i]->port_pid), - dd->ipath_pd[i]->port_comm); - ret = -EBUSY; - goto bail; - } + if (!dd->ipath_pd[i] || !dd->ipath_pd[i]->port_cnt) + continue; + spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags); + ipath_dbg("unit %u port %d is in use " + "(PID %u cmd %s), can't reset\n", + unit, i, + pid_nr(dd->ipath_pd[i]->port_pid), + dd->ipath_pd[i]->port_comm); + ret = -EBUSY; + goto bail; } + spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags); if (dd->ipath_flags & IPATH_HAS_SEND_DMA) teardown_sdma(dd); @@ -2656,9 +2663,12 @@ static int ipath_signal_procs(struct ipath_devdata *dd, int sig) { int i, sub, any = 0; struct pid *pid; + unsigned long flags; if (!dd->ipath_pd) return 0; + + spin_lock_irqsave(&dd->ipath_uctxt_lock, flags); for (i = 1; i < dd->ipath_cfgports; i++) { if (!dd->ipath_pd[i] || !dd->ipath_pd[i]->port_cnt) continue; @@ -2682,6 +2692,7 @@ static int ipath_signal_procs(struct ipath_devdata *dd, int sig) any++; } } + spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags); return any; } |