linux-kernel - [PATCH 2/3] hvc_dcc: Simplify put_chars()/get

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Message-Id: <1292875718-7980-3-git-send-email-sboyd@codeaurora.org>
Date:	Mon, 20 Dec 2010 12:08:37 -0800
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Greg Kroah-Hartman <gregkh@...e.de>
Cc:	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Daniel Walker <dwalker@...eaurora.org>
Subject: [PATCH 2/3] hvc_dcc: Simplify put_chars()/get_chars() loops

Casting and anding with 0xff is unnecessary in
hvc_dcc_put_chars() since buf is already a char[].
__dcc_get_char() can't return an int less than 0 since it only
returns a char. Simplify the if statement in hvc_dcc_get_chars()
to take this into account.

Cc: Daniel Walker <dwalker@...eaurora.org>
Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
---
 drivers/char/hvc_dcc.c |   12 ++++--------
 1 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/char/hvc_dcc.c b/drivers/char/hvc_dcc.c
index 155ec10..ad23cc8 100644
--- a/drivers/char/hvc_dcc.c
+++ b/drivers/char/hvc_dcc.c
@@ -89,7 +89,7 @@ static int hvc_dcc_put_chars(uint32_t vt, const char *buf, int count)
 		while (__dcc_getstatus() & DCC_STATUS_TX)
 			cpu_relax();
 
-		__dcc_putchar((char)(buf[i] & 0xFF));
+		__dcc_putchar(buf[i]);
 	}
 
 	return count;
@@ -99,15 +99,11 @@ static int hvc_dcc_get_chars(uint32_t vt, char *buf, int count)
 {
 	int i;
 
-	for (i = 0; i < count; ++i) {
-		int c = -1;
-
+	for (i = 0; i < count; ++i)
 		if (__dcc_getstatus() & DCC_STATUS_RX)
-			c = __dcc_getchar();
-		if (c < 0)
+			buf[i] = __dcc_getchar();
+		else
 			break;
-		buf[i] = c;
-	}
 
 	return i;
 }
-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

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