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authorDavid Altobelli <david.altobelli@hp.com>2009-03-31 15:23:53 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-01 08:59:18 -0700
commit891f7d73ea30f925596b90bcf21020bfc5d90f3f (patch)
treeee2cf87038f657ead8e6df62acaa47f9805f0215 /drivers/misc/hpilo.c
parent63cd885426872254e82dac2d9e13ea4f720c21dc (diff)
hpilo: reduce frequency of IO operations
Change hpilo open and close logic to spin for 10usec between checking device, rather than every usec. Because the loop is coded to take up to 10ms, it seemed prudent to increase the interval between polling the device, to reduce the load on the system and allow more other work to happen. Signed-off-by: David Altobelli <david.altobelli@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/hpilo.c')
-rw-r--r--drivers/misc/hpilo.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/misc/hpilo.c b/drivers/misc/hpilo.c
index cf991850f01..880ccf39e23 100644
--- a/drivers/misc/hpilo.c
+++ b/drivers/misc/hpilo.c
@@ -209,7 +209,7 @@ static void ilo_ccb_close(struct pci_dev *pdev, struct ccb_data *data)
/* give iLO some time to process stop request */
for (retries = MAX_WAIT; retries > 0; retries--) {
doorbell_set(driver_ccb);
- udelay(1);
+ udelay(WAIT_TIME);
if (!(ioread32(&device_ccb->send_ctrl) & (1 << CTRL_BITPOS_A))
&&
!(ioread32(&device_ccb->recv_ctrl) & (1 << CTRL_BITPOS_A)))
@@ -312,7 +312,7 @@ static int ilo_ccb_open(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
for (i = MAX_WAIT; i > 0; i--) {
if (ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, NULL, NULL))
break;
- udelay(1);
+ udelay(WAIT_TIME);
}
if (i) {
@@ -759,7 +759,7 @@ static void __exit ilo_exit(void)
class_destroy(ilo_class);
}
-MODULE_VERSION("1.0");
+MODULE_VERSION("1.1");
MODULE_ALIAS(ILO_NAME);
MODULE_DESCRIPTION(ILO_NAME);
MODULE_AUTHOR("David Altobelli <david.altobelli@hp.com>");