diff options
| author | Alexander Schmidt <alexs@linux.vnet.ibm.com> | 2009-12-09 21:11:04 +0300 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2009-12-09 21:11:04 +0300 |
| commit | 9420269428b3dc80c98e52beac60a3976fbef7d2 (patch) | |
| tree | b2b43bbaa396613434143efe79b00b15eed690f1 | |
| parent | 91d3f9bacdb4950d2f79fe2ba296aa249f60d06c (diff) | |
| download | linux-9420269428b3dc80c98e52beac60a3976fbef7d2.tar.xz | |
IB/ehca: Rework destroy_eq()
The ibmebus_free_irq() function, which might sleep, was called with
interrupts disabled. To fix this, make sure that no interrupts are
running by killing the interrupt tasklet. Also lock the
shca_list_lock to protect against the poll_eqs_timer running
concurrently.
Signed-off-by: Alexander Schmidt <alexs@linux.vnet.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
| -rw-r--r-- | drivers/infiniband/hw/ehca/ehca_classes.h | 1 | ||||
| -rw-r--r-- | drivers/infiniband/hw/ehca/ehca_eq.c | 9 | ||||
| -rw-r--r-- | drivers/infiniband/hw/ehca/ehca_main.c | 2 |
3 files changed, 8 insertions, 4 deletions
diff --git a/drivers/infiniband/hw/ehca/ehca_classes.h b/drivers/infiniband/hw/ehca/ehca_classes.h index c825142a2fb7..0136abd50dd4 100644 --- a/drivers/infiniband/hw/ehca/ehca_classes.h +++ b/drivers/infiniband/hw/ehca/ehca_classes.h @@ -375,6 +375,7 @@ extern rwlock_t ehca_qp_idr_lock; extern rwlock_t ehca_cq_idr_lock; extern struct idr ehca_qp_idr; extern struct idr ehca_cq_idr; +extern spinlock_t shca_list_lock; extern int ehca_static_rate; extern int ehca_port_act_time; diff --git a/drivers/infiniband/hw/ehca/ehca_eq.c b/drivers/infiniband/hw/ehca/ehca_eq.c index 523e733c630e..3b87589b8ea0 100644 --- a/drivers/infiniband/hw/ehca/ehca_eq.c +++ b/drivers/infiniband/hw/ehca/ehca_eq.c @@ -169,12 +169,15 @@ int ehca_destroy_eq(struct ehca_shca *shca, struct ehca_eq *eq) unsigned long flags; u64 h_ret; - spin_lock_irqsave(&eq->spinlock, flags); ibmebus_free_irq(eq->ist, (void *)shca); - h_ret = hipz_h_destroy_eq(shca->ipz_hca_handle, eq); + spin_lock_irqsave(&shca_list_lock, flags); + eq->is_initialized = 0; + spin_unlock_irqrestore(&shca_list_lock, flags); - spin_unlock_irqrestore(&eq->spinlock, flags); + tasklet_kill(&eq->interrupt_task); + + h_ret = hipz_h_destroy_eq(shca->ipz_hca_handle, eq); if (h_ret != H_SUCCESS) { ehca_err(&shca->ib_device, "Can't free EQ resources."); diff --git a/drivers/infiniband/hw/ehca/ehca_main.c b/drivers/infiniband/hw/ehca/ehca_main.c index fb2d83c5bf01..129a6bebd6e3 100644 --- a/drivers/infiniband/hw/ehca/ehca_main.c +++ b/drivers/infiniband/hw/ehca/ehca_main.c @@ -123,7 +123,7 @@ DEFINE_IDR(ehca_qp_idr); DEFINE_IDR(ehca_cq_idr); static LIST_HEAD(shca_list); /* list of all registered ehcas */ -static DEFINE_SPINLOCK(shca_list_lock); +DEFINE_SPINLOCK(shca_list_lock); static struct timer_list poll_eqs_timer; |