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From: Guenter Roeck <linux@roeck-us.net>
To: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: linux-watchdog@vger.kernel.org, Chris Healy <cphealy@gmail.com>,
	Rick Ramstetter <rick@anteaterllc.com>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 14/22] watchdog: ziirave_wdt: Don't try to program readonly flash
Date: Thu, 15 Aug 2019 11:21:33 -0700
Message-ID: <20190815182133.GJ14388@roeck-us.net> (raw)
In-Reply-To: <20190812200906.31344-15-andrew.smirnov@gmail.com>

On Mon, Aug 12, 2019 at 01:08:58PM -0700, Andrey Smirnov wrote:
> Bootloader code will ignore any attempts to write data to any flash
> area outside of [ZIIRAVE_FIRM_FLASH_MEMORY_START;
> ZIIRAVE_FIRM_FLASH_MEMORY_END]. Firmware update code already have an
> appropriate check to skip those areas when validating updated
> firmware. Firmware programming code, OTOH, does not and will
> needlessly send no-op I2C traffic. Add an appropriate check to
> __ziirave_firm_write_pkt() so as to save all of that wasted effort.
> 
> While at it, normalize all of the address handling code to use full
> 32-bit address in units of bytes and convert it to an appropriate
> value only in places where that is necessary.
> 
> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
> Cc: Chris Healy <cphealy@gmail.com>
> Cc: Guenter Roeck <linux@roeck-us.net>
> Cc: Rick Ramstetter <rick@anteaterllc.com>
> Cc: linux-watchdog@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

  reply index

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-12 20:08 [PATCH v2 00/22] Ziirave_wdt driver fixes Andrey Smirnov
2019-08-12 20:08 ` [PATCH v2 01/22] watchdog: ziirave_wdt: Add missing newline Andrey Smirnov
2019-08-12 20:08 ` [PATCH v2 02/22] watchdog: ziirave_wdt: Be verbose about errors in probe() Andrey Smirnov
2019-08-12 20:08 ` [PATCH v2 03/22] watchdog: ziirave_wdt: Be more verbose during firmware update Andrey Smirnov
2019-08-12 20:08 ` [PATCH v2 04/22] watchdog: ziirave_wdt: Don't bail out on unexpected timeout value Andrey Smirnov
2019-08-15 18:12   ` Guenter Roeck
2019-08-12 20:08 ` [PATCH v2 05/22] watchdog: ziirave_wdt: Log bootloader/firmware info during probe Andrey Smirnov
2019-08-12 20:08 ` [PATCH v2 06/22] watchdog: ziirave_wdt: Simplify ziirave_firm_write_pkt() Andrey Smirnov
2019-08-15 18:14   ` Guenter Roeck
2019-08-12 20:08 ` [PATCH v2 07/22] watchdog: ziirave_wdt: Check packet length only once Andrey Smirnov
2019-08-15 18:14   ` Guenter Roeck
2019-08-12 20:08 ` [PATCH v2 08/22] watchdog: ziirave_wdt: Skip zeros when calculating checksum Andrey Smirnov
2019-08-15 18:16   ` Guenter Roeck
2019-08-12 20:08 ` [PATCH v2 09/22] watchdog: ziirave_wdt: Fix incorrect use of ARRAY_SIZE Andrey Smirnov
2019-08-15 18:17   ` Guenter Roeck
2019-08-12 20:08 ` [PATCH v2 10/22] watchdog: ziirave_wdt: Zero out only what's necessary Andrey Smirnov
2019-08-15 18:17   ` Guenter Roeck
2019-08-12 20:08 ` [PATCH v2 11/22] watchdog: ziirave_wdt: Make use of put_unaligned_le16 Andrey Smirnov
2019-08-15 18:18   ` Guenter Roeck
2019-08-12 20:08 ` [PATCH v2 12/22] watchdog: ziirave_wdt: Don't check if ihex record length is zero Andrey Smirnov
2019-08-15 18:19   ` Guenter Roeck
2019-08-12 20:08 ` [PATCH v2 13/22] watchdog: ziirave_wdt: Don't read out more than 'len' firmware bytes Andrey Smirnov
2019-08-15 18:19   ` Guenter Roeck
2019-08-12 20:08 ` [PATCH v2 14/22] watchdog: ziirave_wdt: Don't try to program readonly flash Andrey Smirnov
2019-08-15 18:21   ` Guenter Roeck [this message]
2019-08-12 20:08 ` [PATCH v2 15/22] watchdog: ziirave_wdt: Fix misleading error message Andrey Smirnov
2019-08-15 18:22   ` Guenter Roeck
2019-08-12 20:09 ` [PATCH v2 16/22] watchdog: ziirave_wdt: Fix JUMP_TO_BOOTLOADER payload Andrey Smirnov
2019-08-15 18:22   ` Guenter Roeck
2019-08-12 20:09 ` [PATCH v2 17/22] watchdog: ziirave_wdt: Fix DOWNLOAD_END payload Andrey Smirnov
2019-08-15 18:23   ` Guenter Roeck
2019-08-12 20:09 ` [PATCH v2 18/22] watchdog: ziirave_wdt: Fix RESET_PROCESSOR payload Andrey Smirnov
2019-08-15 18:23   ` Guenter Roeck
2019-08-12 20:09 ` [PATCH v2 19/22] watchdog: ziirave_wdt: Drop status polling code Andrey Smirnov
2019-08-15 18:24   ` Guenter Roeck
2019-08-12 20:09 ` [PATCH v2 20/22] watchdog: ziirave_wdt: Fix DOWNLOAD_START payload Andrey Smirnov
2019-08-15 18:24   ` Guenter Roeck
2019-08-12 20:09 ` [PATCH v2 21/22] watchdog: ziirave_wdt: Drop ziirave_firm_write_block_data() Andrey Smirnov
2019-08-15 18:25   ` Guenter Roeck
2019-08-12 20:09 ` [PATCH v2 22/22] watchdog: ziirave_wdt: Update checked I2C functionality mask Andrey Smirnov
2019-08-15 18:25   ` Guenter Roeck

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