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ipmi: increase KCS timeouts

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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>
This commit is contained in:
Matthew Garrett 2012-03-28 14:42:48 -07:00 committed by Linus Torvalds
parent b88e769368
commit 828dc9da50
1 changed files with 2 additions and 2 deletions
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4
drivers/char/ipmi/ipmi_kcs_sm.c
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@ -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)