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authorMatthew Garrett <mjg@redhat.com>2012-03-28 14:42:48 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-28 17:14:36 -0700
commit828dc9da50f9632bbc5bc9dfa510619d13135015 (patch)
tree643c5d2ef6b7593841ccb2ab4f5eacedafa7b9ee /drivers/char
parentb88e769368a88cf28e53db158b84eda096144bce (diff)
downloadop-kernel-dev-828dc9da50f9632bbc5bc9dfa510619d13135015.zip
op-kernel-dev-828dc9da50f9632bbc5bc9dfa510619d13135015.tar.gz
ipmi: increase KCS timeouts
We currently time out and retry KCS transactions after 1 second of waiting for IBF or OBF. This appears to be too short for some hardware. The IPMI spec says "All system software wait loops should include error timeouts. For simplicity, such timeouts are not shown explicitly in the flow diagrams. A five-second timeout or greater is recommended". Change the timeout to five seconds to satisfy the slow hardware. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/ipmi/ipmi_kcs_sm.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/char/ipmi/ipmi_kcs_sm.c b/drivers/char/ipmi/ipmi_kcs_sm.c
index cf82fed..e53fc24 100644
--- a/drivers/char/ipmi/ipmi_kcs_sm.c
+++ b/drivers/char/ipmi/ipmi_kcs_sm.c
@@ -118,8 +118,8 @@ enum kcs_states {
#define MAX_KCS_WRITE_SIZE IPMI_MAX_MSG_LENGTH
/* Timeouts in microseconds. */
-#define IBF_RETRY_TIMEOUT 1000000
-#define OBF_RETRY_TIMEOUT 1000000
+#define IBF_RETRY_TIMEOUT 5000000
+#define OBF_RETRY_TIMEOUT 5000000
#define MAX_ERROR_RETRIES 10
#define ERROR0_OBF_WAIT_JIFFIES (2*HZ)
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