linux-kernel - Re: [PATCH v7 22/48] Input: atmel_mxt_ts - improve bootloader state machine handling

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Date:   Thu, 12 Mar 2020 18:28:25 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Jiada Wang <jiada_wang@...tor.com>, jikos@...nel.org,
        benjamin.tissoires@...hat.com, rydberg@...math.org,
        dmitry.torokhov@...il.com, nick@...anahar.org, bsz@...ihalf.com
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        erosca@...adit-jv.com, Andrew_Gabbasov@...tor.com
Subject: Re: [PATCH v7 22/48] Input: atmel_mxt_ts - improve bootloader state
 machine handling

12.02.2020 11:41, Jiada Wang пишет:
> From: Nick Dyer <nick.dyer@...ev.co.uk>
> 
> The code is much clearer if we switch on the actual state the bootloader
> is in, rather than the state we want it to be in, and allows the removal
> of a goto retry tangle.

...
>  	case MXT_WAITING_FRAME_DATA:
> -	case MXT_APP_CRC_FAIL:
> -		val &= ~MXT_BOOT_STATUS_MASK;
> +		if ((f->previous != MXT_WAITING_BOOTLOAD_CMD)
> +		    && (f->previous != MXT_FRAME_CRC_PASS)
> +		    && (f->previous != MXT_FRAME_CRC_FAIL))

This will cleaner to write as follows:

		if (f->previous != MXT_WAITING_BOOTLOAD_CMD &&
		    f->previous != MXT_FRAME_CRC_PASS &&
		    f->previous != MXT_FRAME_CRC_FAIL)