[PATCH] ipmi: kcs error0 delay

[safe/jmp/linux-2.6] / drivers / char / ipmi / ipmi_kcs_sm.c

diff --git a/drivers/char/ipmi/ipmi_kcs_sm.c b/drivers/char/ipmi/ipmi_kcs_sm.c
index dc83365..da15541 100644 (file)
--- a/drivers/char/ipmi/ipmi_kcs_sm.c
+++ b/drivers/char/ipmi/ipmi_kcs_sm.c
@@ -41,6 +41,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/string.h>
+#include <linux/jiffies.h>
 #include <linux/ipmi_msgdefs.h>                /* for completion codes */
 #include "ipmi_si_sm.h"
 
@@ -99,6 +100,7 @@ enum kcs_states {
 #define IBF_RETRY_TIMEOUT 1000000
 #define OBF_RETRY_TIMEOUT 1000000
 #define MAX_ERROR_RETRIES 10
+#define ERROR0_OBF_WAIT_JIFFIES (2*HZ)
 
 struct si_sm_data
 {
@@ -115,6 +117,7 @@ struct si_sm_data
        unsigned int  error_retries;
        long          ibf_timeout;
        long          obf_timeout;
+       unsigned long  error0_timeout;
 };
 
 static unsigned int init_kcs_data(struct si_sm_data *kcs,
@@ -187,6 +190,7 @@ static inline void start_error_recovery(struct si_sm_data *kcs, char *reason)
                        printk(KERN_DEBUG "ipmi_kcs_sm: kcs hosed: %s\n", reason);
                kcs->state = KCS_HOSED;
        } else {
+               kcs->error0_timeout = jiffies + ERROR0_OBF_WAIT_JIFFIES;
                kcs->state = KCS_ERROR0;
        }
 }
@@ -423,6 +427,10 @@ static enum si_sm_result kcs_event(struct si_sm_data *kcs, long time)
 
        case KCS_ERROR0:
                clear_obf(kcs, status);
+               status = read_status(kcs);
+               if  (GET_STATUS_OBF(status)) /* controller isn't responding */
+                       if (time_before(jiffies, kcs->error0_timeout))
+                               return SI_SM_CALL_WITH_TICK_DELAY;
                write_cmd(kcs, KCS_GET_STATUS_ABORT);
                kcs->state = KCS_ERROR1;
                break;