IB/qib: Limit the number of packets processed per interrupt
Don't processes too many packets without allowing other IRQ functions
a chance to run. Otherwise, there is a chance of getting a "soft
lockup" messages and poor application response times.
Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/qib/qib_driver.c b/drivers/infiniband/hw/qib/qib_driver.c
index f15ce07..9cd1936 100644
--- a/drivers/infiniband/hw/qib/qib_driver.c
+++ b/drivers/infiniband/hw/qib/qib_driver.c
@@ -335,7 +335,7 @@
smp_rmb(); /* prevent speculative reads of dma'ed hdrq */
}
- for (last = 0, i = 1; !last; i += !last) {
+ for (last = 0, i = 1; !last && i <= 64; i += !last) {
hdr = dd->f_get_msgheader(dd, rhf_addr);
eflags = qib_hdrget_err_flags(rhf_addr);
etype = qib_hdrget_rcv_type(rhf_addr);