mfd: si476x: Use get_unaligned_be16() for unaligned be16 loads

Loading be16 values from byte buffers may cause unaligned accesses, so use
get_unaligned_be16() to avoid problems on architectures that do not support
these.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 15 insertions, 13 deletions

diff --git a/drivers/mfd/si476x-cmd.c b/drivers/mfd/si476x-cmd.c
index f12f0163feff..6f1ef63086c9 100644
--- a/drivers/mfd/si476x-cmd.c
+++ b/drivers/mfd/si476x-cmd.c
@@ -29,6 +29,8 @@
 
 #include <linux/mfd/si476x-core.h>
 
+#include <asm/unaligned.h>
+
 #define msb(x)                  ((u8)((u16) x >> 8))
 #define lsb(x)                  ((u8)((u16) x &  0x00FF))
 
@@ -483,7 +485,7 @@ int si476x_core_cmd_get_property(struct si476x_core *core, u16 property)
         if (err < 0)
                 return err;
         else
-                return be16_to_cpup((__be16 *)(resp + 2));
+                return get_unaligned_be16(resp + 2);
 }
 EXPORT_SYMBOL_GPL(si476x_core_cmd_get_property);
 
@@ -783,7 +785,7 @@ int si476x_core_cmd_am_rsq_status(struct si476x_core *core,
         report->afcrl           = 0x02 & resp[2];
         report->valid           = 0x01 & resp[2];
 
-        report->readfreq        = be16_to_cpup((__be16 *)(resp + 3));
+        report->readfreq        = get_unaligned_be16(resp + 3);
         report->freqoff         = resp[5];
         report->rssi            = resp[6];
         report->snr             = resp[7];
@@ -944,7 +946,7 @@ int si476x_core_cmd_fm_rds_status(struct si476x_core *core,
         report->tp              = 0x20 & resp[3];
         report->pty             = 0x1f & resp[3];
 
-        report->pi              = be16_to_cpup((__be16 *)(resp + 4));
+        report->pi              = get_unaligned_be16(resp + 4);
         report->rdsfifoused     = resp[6];
 
         report->ble[V4L2_RDS_BLOCK_A]   = 0xc0 & resp[7];
@@ -991,9 +993,9 @@ int si476x_core_cmd_fm_rds_blockcount(struct si476x_core *core,
                                        SI476X_DEFAULT_TIMEOUT);
 
         if (!err) {
-                report->expected        = be16_to_cpup((__be16 *)(resp + 2));
-                report->received        = be16_to_cpup((__be16 *)(resp + 4));
-                report->uncorrectable   = be16_to_cpup((__be16 *)(resp + 6));
+                report->expected        = get_unaligned_be16(resp + 2);
+                report->received        = get_unaligned_be16(resp + 4);
+                report->uncorrectable   = get_unaligned_be16(resp + 6);
         }
 
         return err;
@@ -1210,7 +1212,7 @@ static int si476x_core_cmd_fm_rsq_status_a10(struct si476x_core *core,
         report->afcrl           = 0x02 & resp[2];
         report->valid           = 0x01 & resp[2];
 
-        report->readfreq        = be16_to_cpup((__be16 *)(resp + 3));
+        report->readfreq        = get_unaligned_be16(resp + 3);
         report->freqoff         = resp[5];
         report->rssi            = resp[6];
         report->snr             = resp[7];
@@ -1218,7 +1220,7 @@ static int si476x_core_cmd_fm_rsq_status_a10(struct si476x_core *core,
         report->hassi           = resp[10];
         report->mult            = resp[11];
         report->dev             = resp[12];
-        report->readantcap      = be16_to_cpup((__be16 *)(resp + 13));
+        report->readantcap      = get_unaligned_be16(resp + 13);
         report->assi            = resp[15];
         report->usn             = resp[16];
 
@@ -1264,7 +1266,7 @@ static int si476x_core_cmd_fm_rsq_status_a20(struct si476x_core *core,
         report->afcrl           = 0x02 & resp[2];
         report->valid           = 0x01 & resp[2];
 
-        report->readfreq        = be16_to_cpup((__be16 *)(resp + 3));
+        report->readfreq        = get_unaligned_be16(resp + 3);
         report->freqoff         = resp[5];
         report->rssi            = resp[6];
         report->snr             = resp[7];
@@ -1272,7 +1274,7 @@ static int si476x_core_cmd_fm_rsq_status_a20(struct si476x_core *core,
         report->hassi           = resp[10];
         report->mult            = resp[11];
         report->dev             = resp[12];
-        report->readantcap      = be16_to_cpup((__be16 *)(resp + 13));
+        report->readantcap      = get_unaligned_be16(resp + 13);
         report->assi            = resp[15];
         report->usn             = resp[16];
 
@@ -1320,7 +1322,7 @@ static int si476x_core_cmd_fm_rsq_status_a30(struct si476x_core *core,
         report->afcrl           = 0x02 & resp[2];
         report->valid           = 0x01 & resp[2];
 
-        report->readfreq        = be16_to_cpup((__be16 *)(resp + 3));
+        report->readfreq        = get_unaligned_be16(resp + 3);
         report->freqoff         = resp[5];
         report->rssi            = resp[6];
         report->snr             = resp[7];
@@ -1329,7 +1331,7 @@ static int si476x_core_cmd_fm_rsq_status_a30(struct si476x_core *core,
         report->hassi           = resp[10];
         report->mult            = resp[11];
         report->dev             = resp[12];
-        report->readantcap      = be16_to_cpup((__be16 *)(resp + 13));
+        report->readantcap      = get_unaligned_be16(resp + 13);
         report->assi            = resp[15];
         report->usn             = resp[16];
 
@@ -1337,7 +1339,7 @@ static int si476x_core_cmd_fm_rsq_status_a30(struct si476x_core *core,
         report->rdsdev          = resp[18];
         report->assidev         = resp[19];
         report->strongdev       = resp[20];
-        report->rdspi           = be16_to_cpup((__be16 *)(resp + 21));
+        report->rdspi           = get_unaligned_be16(resp + 21);
 
         return err;
 }