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Groups > linux.kernel > #1609106

[PATCH 2/4] Input: synaptics-rmi4 - fix endianness issue in SMBus transport

From Dmitry Torokhov <dmitry.torokhov@gmail.com>
Newsgroups linux.kernel
Subject [PATCH 2/4] Input: synaptics-rmi4 - fix endianness issue in SMBus transport
Date 2017-03-25 07:10 +0100
Message-ID <toN3H-59k-15@gated-at.bofh.it> (permalink)
References <toN3H-59k-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

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The mapping table holds address in LE form, so we should convert it
to CPU when comparing it.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/rmi4/rmi_smbus.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/input/rmi4/rmi_smbus.c b/drivers/input/rmi4/rmi_smbus.c
index 76752555d809..c8bf49686460 100644
--- a/drivers/input/rmi4/rmi_smbus.c
+++ b/drivers/input/rmi4/rmi_smbus.c
@@ -89,17 +89,16 @@ static int rmi_smb_get_command_code(struct rmi_transport_dev *xport,
 
 	mutex_lock(&rmi_smb->mappingtable_mutex);
 	for (i = 0; i < RMI_SMB2_MAP_SIZE; i++) {
-		if (rmi_smb->mapping_table[i].rmiaddr == rmiaddr) {
+		struct mapping_table_entry *entry = &rmi_smb->mapping_table[i];
+		if (le16_to_cpu(entry->rmiaddr) == rmiaddr) {
 			if (isread) {
-				if (rmi_smb->mapping_table[i].readcount
-							== bytecount) {
+				if (entry->readcount == bytecount) {
 					*commandcode = i;
 					retval = 0;
 					goto exit;
 				}
 			} else {
-				if (rmi_smb->mapping_table[i].flags &
-							RMI_SMB2_MAP_FLAGS_WE) {
+				if (entry->flags & RMI_SMB2_MAP_FLAGS_WE) {
 					*commandcode = i;
 					retval = 0;
 					goto exit;
-- 
2.12.1.578.ge9c3154ca4-goog

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[PATCH 1/4] Input: synaptics-rmi4 - fix handling failures from rmi_enable_sensor Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2017-03-25 07:10 +0100
  [PATCH 4/4] Input: synaptics-rmi4 - when registering sensors do not call them "drivers" Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2017-03-25 07:10 +0100
  [PATCH 3/4] Input: synaptics-rmi4 - cleanup SMbus mapping handling Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2017-03-25 07:10 +0100
  [PATCH 2/4] Input: synaptics-rmi4 - fix endianness issue in SMBus transport Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2017-03-25 07:10 +0100

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