From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 94BA26FA1 for ; Mon, 3 Apr 2023 14:47:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1B79EC433A0; Mon, 3 Apr 2023 14:47:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1680533263; bh=TZQ9Sm5l2kDAZhpM/PIy0lbG0iqc5RAQW1RYefq0zTY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Am/i8RqnXqA6zHYJBUFYKoH7RIr6501jVZmMBZ7sBBzN+YN3KF6IrZFR9pIzibGAb TlsFLRQ/llBo82+Vg5TgdD1YlBpeKYMc+NNbY8maAKJb01jQbVnEVeZ9vwEQAqdHyF zla8BXzdh4nDkJtQDuOQnPJo93jpRt48/D9Hnz6A= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Oleksij Rempel , Florian Fainelli , "David S. Miller" , Sasha Levin Subject: [PATCH 6.2 087/187] net: dsa: microchip: ksz8863_smi: fix bulk access Date: Mon, 3 Apr 2023 16:08:52 +0200 Message-Id: <20230403140418.822152875@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230403140416.015323160@linuxfoundation.org> References: <20230403140416.015323160@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Oleksij Rempel [ Upstream commit 392ff7a84cbca34118ca286dfbfe8aee24605897 ] Current regmap bulk access is broken, resulting to wrong reads/writes if ksz_read64/ksz_write64 functions are used. Mostly this issue was visible by using ksz8_fdb_dump(), which returned corrupt MAC address. The reason is that regmap was configured to have max_raw_read/write, even if ksz8863_mdio_read/write functions are able to handle unlimited read/write accesses. On ksz_read64 function we are using multiple 32bit accesses by incrementing each access by 1 instead of 4. Resulting buffer had 01234567.12345678 instead of 01234567.89abcdef. We have multiple ways to fix it: - enable 4 byte alignment for 32bit accesses. Since the HW do not have this requirement. It will break driver. - disable max_raw_* limit. This patch is removing max_raw_* limit for regmap accesses in ksz8863_smi. Fixes: 60a364760002 ("net: dsa: microchip: Add Microchip KSZ8863 SMI based driver support") Signed-off-by: Oleksij Rempel Reviewed-by: Florian Fainelli Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/dsa/microchip/ksz8863_smi.c | 9 --------- 1 file changed, 9 deletions(-) diff --git a/drivers/net/dsa/microchip/ksz8863_smi.c b/drivers/net/dsa/microchip/ksz8863_smi.c index 2f4623f3bd852..3698112138b78 100644 --- a/drivers/net/dsa/microchip/ksz8863_smi.c +++ b/drivers/net/dsa/microchip/ksz8863_smi.c @@ -82,22 +82,16 @@ static const struct regmap_bus regmap_smi[] = { { .read = ksz8863_mdio_read, .write = ksz8863_mdio_write, - .max_raw_read = 1, - .max_raw_write = 1, }, { .read = ksz8863_mdio_read, .write = ksz8863_mdio_write, .val_format_endian_default = REGMAP_ENDIAN_BIG, - .max_raw_read = 2, - .max_raw_write = 2, }, { .read = ksz8863_mdio_read, .write = ksz8863_mdio_write, .val_format_endian_default = REGMAP_ENDIAN_BIG, - .max_raw_read = 4, - .max_raw_write = 4, } }; @@ -108,7 +102,6 @@ static const struct regmap_config ksz8863_regmap_config[] = { .pad_bits = 24, .val_bits = 8, .cache_type = REGCACHE_NONE, - .use_single_read = 1, .lock = ksz_regmap_lock, .unlock = ksz_regmap_unlock, }, @@ -118,7 +111,6 @@ static const struct regmap_config ksz8863_regmap_config[] = { .pad_bits = 24, .val_bits = 16, .cache_type = REGCACHE_NONE, - .use_single_read = 1, .lock = ksz_regmap_lock, .unlock = ksz_regmap_unlock, }, @@ -128,7 +120,6 @@ static const struct regmap_config ksz8863_regmap_config[] = { .pad_bits = 24, .val_bits = 32, .cache_type = REGCACHE_NONE, - .use_single_read = 1, .lock = ksz_regmap_lock, .unlock = ksz_regmap_unlock, } -- 2.39.2