linux-kernel - [PATCH] staging: vt6655: Use named constants when checking preamble type

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Date:   Thu, 21 Oct 2021 10:27:53 +0100
From:   Karolina Drobnik <karolinadrobnik@...il.com>
To:     outreachy-kernel@...glegroups.com
Cc:     gregkh@...uxfoundation.org, forest@...ttletooquiet.net,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Karolina Drobnik <karolinadrobnik@...il.com>
Subject: [PATCH] staging: vt6655: Use named constants when checking preamble type

Compare `preamble_type` to a predefined constant, `PREAMBLE_SHORT`,
instead of a literal in `bb_get_frame_time` and `vnt_get_phy_field`
functions. Thanks to this change, it is clear that we check
the type of a preamble, not just compare it against an arbitrary value.
Remove a redundant comment.

Signed-off-by: Karolina Drobnik <karolinadrobnik@...il.com>
---
 drivers/staging/vt6655/baseband.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/vt6655/baseband.c b/drivers/staging/vt6655/baseband.c
index 8f9177db6663..84fa6ea3e2e6 100644
--- a/drivers/staging/vt6655/baseband.c
+++ b/drivers/staging/vt6655/baseband.c
@@ -1717,7 +1717,7 @@ unsigned int bb_get_frame_time(unsigned char preamble_type,
 	rate = (unsigned int)awc_frame_time[rate_idx];
 
 	if (rate_idx <= 3) {		    /* CCK mode */
-		if (preamble_type == 1) /* Short */
+		if (preamble_type == PREAMBLE_SHORT)
 			preamble = 96;
 		else
 			preamble = 192;
@@ -1779,7 +1779,7 @@ void vnt_get_phy_field(struct vnt_private *priv, u32 frame_length,
 	case RATE_2M:
 		count = bit_count / 2;
 
-		if (preamble_type == 1)
+		if (preamble_type == PREAMBLE_SHORT)
 			phy->signal = 0x09;
 		else
 			phy->signal = 0x01;
@@ -1792,7 +1792,7 @@ void vnt_get_phy_field(struct vnt_private *priv, u32 frame_length,
 		if (tmp != bit_count)
 			count++;
 
-		if (preamble_type == 1)
+		if (preamble_type == PREAMBLE_SHORT)
 			phy->signal = 0x0a;
 		else
 			phy->signal = 0x02;
@@ -1809,7 +1809,7 @@ void vnt_get_phy_field(struct vnt_private *priv, u32 frame_length,
 				ext_bit = true;
 		}
 
-		if (preamble_type == 1)
+		if (preamble_type == PREAMBLE_SHORT)
 			phy->signal = 0x0b;
 		else
 			phy->signal = 0x03;
-- 
2.30.2