linux-kernel - [PATCH 01/12] pata_parport: Remove pi_swab16 and pi

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Message-Id: <20230211144232.15138-2-linux@zary.sk>
Date:   Sat, 11 Feb 2023 15:42:21 +0100
From:   Ondrej Zary <linux@...y.sk>
To:     Damien Le Moal <damien.lemoal@...nsource.wdc.com>
Cc:     Christoph Hellwig <hch@....de>,
        Sergey Shtylyov <s.shtylyov@....ru>,
        Jens Axboe <axboe@...nel.dk>, Tim Waugh <tim@...erelk.net>,
        linux-block@...r.kernel.org, linux-parport@...ts.infradead.org,
        linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 01/12] pata_parport: Remove pi_swab16 and pi_swab32

Convert comm and kbic drivers to use standard swab16.
Remove pi_swab16 and pi_swab32.

The funny thing: pi_swab32 was not swab32

Signed-off-by: Ondrej Zary <linux@...y.sk>
---
 drivers/ata/pata_parport/comm.c |  7 +++++--
 drivers/ata/pata_parport/kbic.c |  7 +++++--
 include/linux/pata_parport.h    | 17 -----------------
 3 files changed, 10 insertions(+), 21 deletions(-)

diff --git a/drivers/ata/pata_parport/comm.c b/drivers/ata/pata_parport/comm.c
index 1775e7ed9336..11ed9fb57744 100644
--- a/drivers/ata/pata_parport/comm.c
+++ b/drivers/ata/pata_parport/comm.c
@@ -165,11 +165,14 @@ static void comm_write_block( PIA *pi, char * buf, int count )
                 break;
 
         case 3: w3(0x48); (void)r1();
-                for (k=0;k<count/2;k++) w4w(pi_swab16(buf,k));
+		for (k = 0; k < count / 2; k++)
+			w4w(swab16(((u16 *)buf)[k]));
                 break;
 
         case 4: w3(0x48); (void)r1();
-                for (k=0;k<count/4;k++) w4l(pi_swab32(buf,k));
+		for (k = 0; k < count / 4; k++)
+			w4l(swab16(((u16 *)buf)[2 * k]) |
+			    swab16(((u16 *)buf)[2 * k + 1]) << 16);
                 break;
 
 
diff --git a/drivers/ata/pata_parport/kbic.c b/drivers/ata/pata_parport/kbic.c
index f0960eb68635..93430ca32a52 100644
--- a/drivers/ata/pata_parport/kbic.c
+++ b/drivers/ata/pata_parport/kbic.c
@@ -213,12 +213,15 @@ static void kbic_write_block( PIA *pi, char * buf, int count )
 		break;
 
 	case 4: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
-                for(k=0;k<count/2;k++) w4w(pi_swab16(buf,k));
+		for (k = 0; k < count / 2; k++)
+			w4w(swab16(((u16 *)buf)[k]));
                 w2(4); w2(0); w2(4);
                 break;
 
         case 5: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
-                for(k=0;k<count/4;k++) w4l(pi_swab32(buf,k));
+		for (k = 0; k < count / 4; k++)
+			w4l(swab16(((u16 *)buf)[2 * k]) |
+			    swab16(((u16 *)buf)[2 * k + 1]) << 16);
                 w2(4); w2(0); w2(4);
                 break;
 
diff --git a/include/linux/pata_parport.h b/include/linux/pata_parport.h
index 58781846f282..458544fe5e6c 100644
--- a/include/linux/pata_parport.h
+++ b/include/linux/pata_parport.h
@@ -54,23 +54,6 @@ typedef struct pi_adapter PIA;	/* for paride protocol modules */
 #define r4w()			(delay_p, inw(pi->port + 4))
 #define r4l()			(delay_p, inl(pi->port + 4))
 
-static inline u16 pi_swab16(char *b, int k)
-{
-	union { u16 u; char t[2]; } r;
-
-	r.t[0] = b[2 * k + 1]; r.t[1] = b[2 * k];
-	return r.u;
-}
-
-static inline u32 pi_swab32(char *b, int k)
-{
-	union { u32 u; char f[4]; } r;
-
-	r.f[0] = b[4 * k + 1]; r.f[1] = b[4 * k];
-	r.f[2] = b[4 * k + 3]; r.f[3] = b[4 * k + 2];
-	return r.u;
-}
-
 struct pi_protocol {
 	char name[8];
 
-- 
Ondrej Zary