[PATCH] i2c-viapro: Some adjustments

The big i2c-viapro SMBus driver update which went into 2.6.14-git1
introduced a few minor issues. Nothing critical, but I would like a
few adjustments to be merged in to fix the following problems:

* VIA should not be spelled Via.
* Frodo Looijaard and Philip Edelbrock did not write the i2c-viapro
  driver.
* When debugging is disabled, half of messages would be logged.
* Drop an unneeded masking.
* Some port reads can be avoided now that the transaction size is
  passed as a parameter to vt596_transaction().
* SMBus Receive Byte transactions are used for probing too (for
  EEPROMs), so hide errors on these too.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 14 insertions, 13 deletions

diff --git a/drivers/i2c/busses/i2c-viapro.c b/drivers/i2c/busses/i2c-viapro.c
index c9366b504833..a2237d4b2cf2 100644
--- a/drivers/i2c/busses/i2c-viapro.c
+++ b/drivers/i2c/busses/i2c-viapro.c
@@ -142,19 +142,18 @@ static int vt596_transaction(u8 size)
         /* Make sure the SMBus host is ready to start transmitting */
         if ((temp = inb_p(SMBHSTSTS)) & 0x1F) {
                 dev_dbg(&vt596_adapter.dev, "SMBus busy (0x%02x). "
-                        "Resetting... ", temp);
+                        "Resetting...\n", temp);
 
                 outb_p(temp, SMBHSTSTS);
                 if ((temp = inb_p(SMBHSTSTS)) & 0x1F) {
-                        printk("Failed! (0x%02x)\n", temp);
+                        dev_err(&vt596_adapter.dev, "SMBus reset failed! "
+                                "(0x%02x)\n", temp);
                         return -1;
-                } else {
-                        printk("Successful!\n");
                 }
         }
 
         /* Start the transaction by setting bit 6 */
-        outb_p(0x40 | (size & 0x3C), SMBHSTCNT);
+        outb_p(0x40 | size, SMBHSTCNT);
 
         /* We will always wait for a fraction of a second */
         do {
@@ -171,7 +170,7 @@ static int vt596_transaction(u8 size)
         if (temp & 0x10) {
                 result = -1;
                 dev_err(&vt596_adapter.dev, "Transaction failed (0x%02x)\n",
-                        inb_p(SMBHSTCNT) & 0x3C);
+                        size);
         }
 
         if (temp & 0x08) {
@@ -180,11 +179,13 @@ static int vt596_transaction(u8 size)
         }
 
         if (temp & 0x04) {
+                int read = inb_p(SMBHSTADD) & 0x01;
                 result = -1;
-                /* Quick commands are used to probe for chips, so
-                   errors are expected, and we don't want to frighten the
-                   user. */
-                if ((inb_p(SMBHSTCNT) & 0x3C) != VT596_QUICK)
+                /* The quick and receive byte commands are used to probe
+                   for chips, so errors are expected, and we don't want
+                   to frighten the user. */
+                if (!((size == VT596_QUICK && !read) ||
+                      (size == VT596_BYTE && read)))
                         dev_err(&vt596_adapter.dev, "Transaction error!\n");
         }
 
@@ -462,9 +463,9 @@ static void __exit i2c_vt596_exit(void)
         }
 }
 
-MODULE_AUTHOR(
-    "Frodo Looijaard <frodol@dds.nl> and "
-    "Philip Edelbrock <phil@netroedge.com>");
+MODULE_AUTHOR("Kyosti Malkki <kmalkki@cc.hut.fi>, "
+              "Mark D. Studebaker <mdsxyz123@yahoo.com> and "
+              "Jean Delvare <khali@linux-fr.org>");
 MODULE_DESCRIPTION("vt82c596 SMBus driver");
 MODULE_LICENSE("GPL");