floppy: make sure to reset all FDCs upon resume()

In floppy_resume() we don't properly reinitialize all FDCs, instead
we reinitialize the current FDC once per available FDC because value
-1 is passed to user_reset_fdc(). Let's simply save the current drive
and properly reinitialize each FDC.

Link: https://lore.kernel.org/r/20200410101904.14652-1-w@1wt.eu
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Denis Efremov <efremov@linux.com>

drivers/block/floppy.c

@@ -4545,11 +4545,13 @@ static void floppy_device_release(struct device *dev)
 static int floppy_resume(struct device *dev)
 {
 	int fdc;
+	int saved_drive;
 
+	saved_drive = current_drive;
 	for (fdc = 0; fdc < N_FDC; fdc++)
 		if (fdc_state[fdc].address != -1)
-			user_reset_fdc(-1, FD_RESET_ALWAYS, false);
-
+			user_reset_fdc(REVDRIVE(fdc, 0), FD_RESET_ALWAYS, false);
+	set_fdc(saved_drive);
 	return 0;
 }