linux-kernel - [PATCH v2 1/6] floppy: remove dead code for drives scanning on ARM

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Date:   Sun,  1 Mar 2020 20:55:50 +0100
From:   Willy Tarreau <w@....eu>
To:     Denis Efremov <efremov@...ux.com>
Cc:     Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org,
        linux-block@...r.kernel.org, Willy Tarreau <w@....eu>,
        Ian Molton <spyro@....com>,
        Russell King <linux@...linux.org.uk>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH v2 1/6] floppy: remove dead code for drives scanning on ARM

On ARM, function fd_scandrives pre-dates Git era, is #ifed 0 out, not
used, and cannot even compile since it references an fdc variable that's
not declared anywhere (supposed to be the global one that we're turning
to current_fdc apparently).

There was also an ifdefde out include of mach/floppy.h that does not
exist anymore either. Let's get rid of them since they complicate the
fixing of the driver.

Cc: Ian Molton <spyro@....com>
Cc: Russell King <linux@...linux.org.uk>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Willy Tarreau <w@....eu>
---
 arch/arm/include/asm/floppy.h | 51 -------------------------------------------
 1 file changed, 51 deletions(-)

diff --git a/arch/arm/include/asm/floppy.h b/arch/arm/include/asm/floppy.h
index f4fe4d0..4655652 100644
--- a/arch/arm/include/asm/floppy.h
+++ b/arch/arm/include/asm/floppy.h
@@ -8,9 +8,6 @@
  */
 #ifndef __ASM_ARM_FLOPPY_H
 #define __ASM_ARM_FLOPPY_H
-#if 0
-#include <mach/floppy.h>
-#endif
 
 #define fd_outb(val,port)			\
 	do {					\
@@ -69,54 +66,6 @@ do {										\
 	outb(new_dor, FD_DOR);							\
 } while (0)
 
-/*
- * Someday, we'll automatically detect which drives are present...
- */
-static inline void fd_scandrives (void)
-{
-#if 0
-	int floppy, drive_count;
-
-	fd_disable_irq();
-	raw_cmd = &default_raw_cmd;
-	raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_SEEK;
-	raw_cmd->track = 0;
-	raw_cmd->rate = ?;
-	drive_count = 0;
-	for (floppy = 0; floppy < 4; floppy ++) {
-		current_drive = drive_count;
-		/*
-		 * Turn on floppy motor
-		 */
-		if (start_motor(redo_fd_request))
-			continue;
-		/*
-		 * Set up FDC
-		 */
-		fdc_specify();
-		/*
-		 * Tell FDC to recalibrate
-		 */
-		output_byte(FD_RECALIBRATE);
-		LAST_OUT(UNIT(floppy));
-		/* wait for command to complete */
-		if (!successful) {
-			int i;
-			for (i = drive_count; i < 3; i--)
-				floppy_selects[fdc][i] = floppy_selects[fdc][i + 1];
-			floppy_selects[fdc][3] = 0;
-			floppy -= 1;
-		} else
-			drive_count++;
-	}
-#else
-	floppy_selects[0][0] = 0x10;
-	floppy_selects[0][1] = 0x21;
-	floppy_selects[0][2] = 0x23;
-	floppy_selects[0][3] = 0x33;
-#endif
-}
-
 #define FDC1 (0x3f0)
 
 #define FLOPPY0_TYPE 4
-- 
2.9.0