From cda66615116012b01fca5dd16d907b5490aef3f5 Mon Sep 17 00:00:00 2001
From: ppisa <ppisa>
Date: Wed, 1 Jun 2005 18:22:12 +0000
Subject: [PATCH] Some more C_CAN changes

---
 lincan/src/c_can.c | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/lincan/src/c_can.c b/lincan/src/c_can.c
index e51181b..a0503b4 100644
--- a/lincan/src/c_can.c
+++ b/lincan/src/c_can.c
@@ -484,18 +484,26 @@ int c_can_pre_read_config(struct canchip_t *pchip, struct msgobj_t *pmsgobj)
 
    spin_lock( &c_can_if1lock );
 
-
    //loading Message Object in IF1
-   if (c_can_if1_busycheck(pmsgobj->hostchip)) return -ENODEV;
+   if (c_can_if1_busycheck(pmsgobj->hostchip))
+	goto error_enodev;
+   
    c_can_write_reg_w(pmsgobj->hostchip, readMaskCM, CCIF1CM);
    c_can_write_reg_w(pmsgobj->hostchip, pmsgobj->object, CCIF1CR);
+
    //setting Message Valid Bit to zero
-   if (c_can_if1_busycheck(pmsgobj->hostchip)) return -ENODEV;
+   if (c_can_if1_busycheck(pmsgobj->hostchip))
+	goto error_enodev;
+
    c_can_write_reg_w(pmsgobj->hostchip, 0, CCIF1A2);
    c_can_write_reg_w(pmsgobj->hostchip, writeMaskCM, CCIF1CM);
    c_can_write_reg_w(pmsgobj->hostchip, pmsgobj->object, CCIF1CR);
+
    //Configuring Message-Object
-   if (c_can_if1_busycheck(pmsgobj->hostchip)) return -ENODEV;
+   /* Only access when the C_CAN controller is idle */
+   if (c_can_if1_busycheck(pmsgobj->hostchip))
+	goto error_enodev;
+
    mcreg = c_can_read_reg_w(pmsgobj->hostchip, CCIF1CM);
    c_can_write_reg_w(pmsgobj->hostchip, 
                      ((mcreg & IFXMC_UMASK) | IFXMC_EOB | IFXMC_RXIE), CCIF1DMC);
@@ -524,6 +532,12 @@ int c_can_pre_read_config(struct canchip_t *pchip, struct msgobj_t *pmsgobj)
 #endif
 
    return 0;
+
+error_enodev:
+   CANMSG("Timeout in c_can_if1_busycheck\n");
+   spin_unlock(&c_can_if1lock);
+   return -ENODEV;
+
 }
 
 ///////////////////////////////////////////////////////////////////////
-- 
2.39.2