[PATCH 2/5] staging: wilc1000: fixes for undefined reference to `__this_module' error

[Ajay Singh <ajay.kathat@microchip.com>]

wilc_debug.o object file is included for both SDIO and SPI module. When
anyone(either SDIO or SPI) module is compiled as loaded module and another
as buildin module then below compilation error occurs.

"drivers/staging/wilc1000/wilc_debugfs.o:(.data+0x10): undefined
reference to `__this_module'"

Moved the declaration of file_operation variable in SDIO/SPI files and
pass this as parameter to wilc_debugfs_init(). Remove 'fops' element
from 'wilc_debugfs_info_t' struct, as its not required.

Fixes: 9abc44ba4e2f ("staging: wilc1000: fix TODO to compile spi and sdio components in single module")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
---
 drivers/staging/wilc1000/linux_wlan.c   |  1 -
 drivers/staging/wilc1000/wilc_debugfs.c | 23 ++++++-----------------
 drivers/staging/wilc1000/wilc_sdio.c    |  7 +++++++
 drivers/staging/wilc1000/wilc_spi.c     |  7 +++++++
 drivers/staging/wilc1000/wilc_wlan_if.h |  7 ++++++-
 5 files changed, 26 insertions(+), 19 deletions(-)

diff --git a/drivers/staging/wilc1000/linux_wlan.c b/drivers/staging/wilc1000/linux_wlan.c
index 01cf4bd..37885ad 100644
--- a/drivers/staging/wilc1000/linux_wlan.c
+++ b/drivers/staging/wilc1000/linux_wlan.c
@@ -1062,7 +1062,6 @@ int wilc_netdev_init(struct wilc **wilc, struct device *dev, int io_type,
 	if (!wl)
 		return -ENOMEM;
 
-	wilc_debugfs_init();
 	*wilc = wl;
 	wl->io_type = io_type;
 	wl->hif_func = ops;
diff --git a/drivers/staging/wilc1000/wilc_debugfs.c b/drivers/staging/wilc1000/wilc_debugfs.c
index c5f67c9..78c0831 100644
--- a/drivers/staging/wilc1000/wilc_debugfs.c
+++ b/drivers/staging/wilc1000/wilc_debugfs.c
@@ -20,8 +20,8 @@ static struct dentry *wilc_dir;
 #define DBG_LEVEL_ALL	(DEBUG | INFO | WRN | ERR)
 static atomic_t WILC_DEBUG_LEVEL = ATOMIC_INIT(ERR);
 
-static ssize_t wilc_debug_level_read(struct file *file, char __user *userbuf,
-				     size_t count, loff_t *ppos)
+ssize_t wilc_debug_level_read(struct file *file, char __user *userbuf,
+			      size_t count, loff_t *ppos)
 {
 	char buf[128];
 	int res = 0;
@@ -36,9 +36,8 @@ static ssize_t wilc_debug_level_read(struct file *file, char __user *userbuf,
 	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
 }
 
-static ssize_t wilc_debug_level_write(struct file *filp,
-				      const char __user *buf, size_t count,
-				      loff_t *ppos)
+ssize_t wilc_debug_level_write(struct file *filp, const char __user *buf,
+			       size_t count, loff_t *ppos)
 {
 	int flag = 0;
 	int ret;
@@ -63,35 +62,25 @@ static ssize_t wilc_debug_level_write(struct file *filp,
 	return count;
 }
 
-#define FOPS(_open, _read, _write, _poll) { \
-		.owner	= THIS_MODULE, \
-		.open	= (_open), \
-		.read	= (_read), \
-		.write	= (_write), \
-		.poll		= (_poll), \
-}
-
 struct wilc_debugfs_info_t {
 	const char *name;
 	int perm;
 	unsigned int data;
-	const struct file_operations fops;
 };
 
 static struct wilc_debugfs_info_t debugfs_info = {
 	"wilc_debug_level",
 	0666,
 	(DEBUG | ERR),
-	FOPS(NULL, wilc_debug_level_read, wilc_debug_level_write, NULL),
 };
 
-int wilc_debugfs_init(void)
+int wilc_debugfs_init(const struct file_operations *fops)
 {
 	struct wilc_debugfs_info_t *info = &debugfs_info;
 
 	wilc_dir = debugfs_create_dir("wilc_wifi", NULL);
 	debugfs_create_file(info->name, info->perm, wilc_dir, &info->data,
-			    &info->fops);
+			    fops);
 
 	return 0;
 }
diff --git a/drivers/staging/wilc1000/wilc_sdio.c b/drivers/staging/wilc1000/wilc_sdio.c
index b2080d8..c1573f5 100644
--- a/drivers/staging/wilc1000/wilc_sdio.c
+++ b/drivers/staging/wilc1000/wilc_sdio.c
@@ -103,6 +103,12 @@ static int wilc_sdio_cmd53(struct wilc *wilc, struct sdio_cmd53 *cmd)
 	return ret;
 }
 
+static const struct file_operations sdio_debug_fops = {
+	.owner		= THIS_MODULE,
+	.read		= wilc_debug_level_read,
+	.write		= wilc_debug_level_write,
+};
+
 static int linux_sdio_probe(struct sdio_func *func,
 			    const struct sdio_device_id *id)
 {
@@ -126,6 +132,7 @@ static int linux_sdio_probe(struct sdio_func *func,
 		dev_err(&func->dev, "Couldn't initialize netdev\n");
 		return ret;
 	}
+	wilc_debugfs_init(&sdio_debug_fops);
 	sdio_set_drvdata(func, wilc);
 	wilc->dev = &func->dev;
 	wilc->gpio_irq = gpio;
diff --git a/drivers/staging/wilc1000/wilc_spi.c b/drivers/staging/wilc1000/wilc_spi.c
index 5517477..0376649 100644
--- a/drivers/staging/wilc1000/wilc_spi.c
+++ b/drivers/staging/wilc1000/wilc_spi.c
@@ -102,6 +102,12 @@ static u8 crc7(u8 crc, const u8 *buffer, u32 len)
 
 #define USE_SPI_DMA				0
 
+static const struct file_operations spi_debug_fops = {
+	.owner		= THIS_MODULE,
+	.read		= wilc_debug_level_read,
+	.write		= wilc_debug_level_write,
+};
+
 static int wilc_bus_probe(struct spi_device *spi)
 {
 	int ret;
@@ -120,6 +126,7 @@ static int wilc_bus_probe(struct spi_device *spi)
 	if (ret)
 		return ret;
 
+	wilc_debugfs_init(&spi_debug_fops);
 	spi_set_drvdata(spi, wilc);
 	wilc->dev = &spi->dev;
 	wilc->gpio_irq = gpio;
diff --git a/drivers/staging/wilc1000/wilc_wlan_if.h b/drivers/staging/wilc1000/wilc_wlan_if.h
index 00d13b1..47b4020 100644
--- a/drivers/staging/wilc1000/wilc_wlan_if.h
+++ b/drivers/staging/wilc1000/wilc_wlan_if.h
@@ -831,6 +831,11 @@ struct wilc;
 int wilc_wlan_init(struct net_device *dev);
 u32 wilc_get_chipid(struct wilc *wilc, bool update);
 
-int wilc_debugfs_init(void);
+int wilc_debugfs_init(const struct file_operations *fops);
 void wilc_debugfs_remove(void);
+ssize_t wilc_debug_level_read(struct file *file, char __user *userbuf,
+			      size_t count, loff_t *ppos);
+ssize_t wilc_debug_level_write(struct file *filp, const char __user *buf,
+			       size_t count, loff_t *ppos);
+
 #endif
-- 
2.7.4