linux-kernel - [PATCH] staging: comedi: Fix incorrect type assignment

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Date:   Wed,  8 Feb 2017 00:36:27 +0530
From:   Karthik Nayak <karthik.188@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     devel@...verdev.osuosl.org, abbotti@....co.uk,
        hsweeten@...ionengravers.com, kastolom@...il.com,
        gregkh@...uxfoundation.org, Karthik Nayak <Karthik.188@...il.com>
Subject: [PATCH] staging: comedi: Fix incorrect type assignment

This patch fixes the following sparse error:
drivers/staging/comedi/drivers//ni_pcimio.c:1229:32: warning: incorrect type in assignment (different base types)
drivers/staging/comedi/drivers//ni_pcimio.c:1229:32:    expected restricted __be32 [usertype] serial_number
drivers/staging/comedi/drivers//ni_pcimio.c:1229:32:    got unsigned int

This is done by introducing a temporary variable which is of type
'__be32' and converting the existing variable to type 'unsigned int'.

Signed-off-by: Karthik Nayak <Karthik.188@...il.com>
---
 drivers/staging/comedi/drivers/ni_pcimio.c | 5 +++--
 drivers/staging/comedi/drivers/ni_stc.h    | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/comedi/drivers/ni_pcimio.c b/drivers/staging/comedi/drivers/ni_pcimio.c
index cdb66eab1292..4f45a5c230ad 100644
--- a/drivers/staging/comedi/drivers/ni_pcimio.c
+++ b/drivers/staging/comedi/drivers/ni_pcimio.c
@@ -1207,6 +1207,7 @@ static void m_series_init_eeprom_buffer(struct comedi_device *dev)
 	unsigned int old_iodwbsr_bits;
 	unsigned int old_iodwbsr1_bits;
 	unsigned int old_iodwcr1_bits;
+	__be32 serial_number;
 	int i;
 
 	/* IO Window 1 needs to be temporarily mapped to read the eeprom */
@@ -1223,10 +1224,10 @@ static void m_series_init_eeprom_buffer(struct comedi_device *dev)
 
 	BUG_ON(serial_number_eeprom_length > sizeof(devpriv->serial_number));
 	for (i = 0; i < serial_number_eeprom_length; ++i) {
-		char *byte_ptr = (char *)&devpriv->serial_number + i;
+		char *byte_ptr = (char *)&serial_number + i;
 		*byte_ptr = ni_readb(dev, serial_number_eeprom_offset + i);
 	}
-	devpriv->serial_number = be32_to_cpu(devpriv->serial_number);
+	devpriv->serial_number = be32_to_cpu(serial_number);
 
 	for (i = 0; i < M_SERIES_EEPROM_SIZE; ++i)
 		devpriv->eeprom_buffer[i] = ni_readb(dev, Start_Cal_EEPROM + i);
diff --git a/drivers/staging/comedi/drivers/ni_stc.h b/drivers/staging/comedi/drivers/ni_stc.h
index f27b545f83eb..b5eca0da71eb 100644
--- a/drivers/staging/comedi/drivers/ni_stc.h
+++ b/drivers/staging/comedi/drivers/ni_stc.h
@@ -1031,7 +1031,7 @@ struct ni_private {
 
 	unsigned short ai_fifo_buffer[0x2000];
 	u8 eeprom_buffer[M_SERIES_EEPROM_SIZE];
-	__be32 serial_number;
+	unsigned int serial_number;
 
 	struct mite *mite;
 	struct mite_channel *ai_mite_chan;
-- 
2.11.0