linux-kernel - [PATCH RFC v2 2/6] staging: r8188eu: add helper macro for printing registers

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Message-Id: <84e388b0eaaf3c56f575216b0571318ed799a4d2.1629642658.git.paskripkin@gmail.com>
Date:   Sun, 22 Aug 2021 17:35:41 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     Larry.Finger@...inger.net, phil@...lpotter.co.uk,
        gregkh@...uxfoundation.org, straube.linux@...il.com,
        fmdefrancesco@...il.com
Cc:     linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Pavel Skripkin <paskripkin@...il.com>
Subject: [PATCH RFC v2 2/6] staging: r8188eu: add helper macro for printing registers

There are a lof of places, where DBG_88E() is used to print register
value. Since following patches change _rtw_read*() family
prototypes, we can wrap printing registers into useful macro to avoid
open-coding error checking like this:

	u32 tmp;
	if (!rtw_read(&tmp))
		DBG("reg = %d\n", tmp);

So, added DBG_88E_REG{8,16,32} macros for printing register values.

Signed-off-by: Pavel Skripkin <paskripkin@...il.com>
---
 drivers/staging/r8188eu/include/rtw_debug.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/staging/r8188eu/include/rtw_debug.h b/drivers/staging/r8188eu/include/rtw_debug.h
index 3c3bf2a4f30e..059647b9cd3a 100644
--- a/drivers/staging/r8188eu/include/rtw_debug.h
+++ b/drivers/staging/r8188eu/include/rtw_debug.h
@@ -72,6 +72,19 @@ extern u32 GlobalDebugLevel;
 			pr_info(DRIVER_PREFIX __VA_ARGS__);			\
 	} while (0)
 
+#define __DBG_88E_REG(fmt, adap, reg, size)				\
+	do {								\
+		u##size __tmp__;					\
+		if (rtw_read##size((adap), (reg), &__tmp__))		\
+			break;						\
+		if (_drv_err_ <= GlobalDebugLevel)			\
+			pr_info(DRIVER_PREFIX fmt, __tmp__);		\
+	} while (0)
+
+#define DBG_88E_REG8(fmt, adap, reg)	__DBG_88E_REG(fmt, adap, reg, 8)
+#define DBG_88E_REG16(fmt, adap, reg)	__DBG_88E_REG(fmt, adap, reg, 16)
+#define DBG_88E_REG32(fmt, adap, reg)	__DBG_88E_REG(fmt, adap, reg, 32)
+
 int proc_get_drv_version(char *page, char **start,
 			 off_t offset, int count,
 			 int *eof, void *data);
-- 
2.32.0