linux-kernel - [PATCH 1/5] power_supply: fix up olpc

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Date:	Mon, 22 Jun 2009 23:45:45 -0400
From:	Andres Salomon <dilinger@...labora.co.uk>
To:	cbou@...l.ru
Cc:	dwmw2@...radead.org, linux-kernel@...r.kernel.org,
	richard@...top.org, Andrew Morton <akpm@...ux-foundation.org>,
	Paul Fox <pgf@...top.org>, dsaxena@...top.org
Subject: [PATCH 1/5] power_supply: fix up olpc_battery's eeprom read
 function


The eeprom read function was placing values into the wrong place in
'buf'; we were starting from buf[off], rather than buf[0].

Also, the for loop that we were using was much uglier than it needed to
be.  This cleans it up a bit.

Signed-off-by: Andres Salomon <dilinger@...labora.co.uk>
---
 drivers/power/olpc_battery.c |   14 ++++++--------
 1 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
index 5fbca26..8f41733 100644
--- a/drivers/power/olpc_battery.c
+++ b/drivers/power/olpc_battery.c
@@ -334,21 +334,19 @@ static ssize_t olpc_bat_eeprom_read(struct kobject *kobj,
 		struct bin_attribute *attr, char *buf, loff_t off, size_t count)
 {
 	uint8_t ec_byte;
-	int ret, end;
+	int ret, i;
 
 	if (off >= EEPROM_SIZE)
 		return 0;
 	if (off + count > EEPROM_SIZE)
 		count = EEPROM_SIZE - off;
 
-	end = EEPROM_START + off + count;
-	for (ec_byte = EEPROM_START + off; ec_byte < end; ec_byte++) {
-		ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1,
-				&buf[ec_byte - EEPROM_START], 1);
+	for (i = 0; i < count; i++) {
+		ec_byte = EEPROM_START + off + i;
+		ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &buf[i], 1);
 		if (ret) {
-			printk(KERN_ERR "olpc-battery:  EC command "
-					"EC_BAT_EEPROM @ 0x%x failed -"
-					" %d!\n", ec_byte, ret);
+			printk(KERN_ERR "olpc-battery:  EC_BAT_EEPROM cmd @ 0x%x failed - %d!\n",
+					ec_byte, ret);
 			return -EIO;
 		}
 	}
-- 
1.5.6.5

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