From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from out1-smtp.messagingengine.com ([66.111.4.25]:52114 "EHLO out1-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933826AbdAIIdA (ORCPT ); Mon, 9 Jan 2017 03:33:00 -0500 Subject: FAILED: patch "[PATCH] ARM: davinci: da850: fix infinite loop in clk_set_rate()" failed to apply to 4.9-stable tree To: bgolaszewski@baylibre.com, nsekhar@ti.com, stable@vger.kernel.org Cc: From: Date: Mon, 09 Jan 2017 09:32:59 +0100 Message-ID: <1483950779242188@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >>From 5d45b011c14a791ef23555a59ff7a3e6d213530f Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Wed, 7 Dec 2016 16:22:15 +0100 Subject: [PATCH] ARM: davinci: da850: fix infinite loop in clk_set_rate() The aemif clock is added twice to the lookup table in da850.c. This breaks the children list of pll0_sysclk3 as we're using the same list links in struct clk. When calling clk_set_rate(), we get stuck in propagate_rate(). Create a separate clock for nand, inheriting the rate of the aemif clock and retrieve it in the davinci_nand module. Cc: # 4.9.x Signed-off-by: Bartosz Golaszewski Signed-off-by: Sekhar Nori diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c index e770c97ea45c..e9d019cc8f46 100644 --- a/arch/arm/mach-davinci/da850.c +++ b/arch/arm/mach-davinci/da850.c @@ -367,6 +367,16 @@ static struct clk aemif_clk = { .flags = ALWAYS_ENABLED, }; +/* + * In order to avoid adding the aemif_clk to the clock lookup table twice (and + * screwing up the linked list in the process) create a separate clock for + * nand inheriting the rate from aemif_clk. + */ +static struct clk aemif_nand_clk = { + .name = "nand", + .parent = &aemif_clk, +}; + static struct clk usb11_clk = { .name = "usb11", .parent = &pll0_sysclk4, @@ -537,7 +547,15 @@ static struct clk_lookup da850_clks[] = { CLK("da830-mmc.0", NULL, &mmcsd0_clk), CLK("da830-mmc.1", NULL, &mmcsd1_clk), CLK("ti-aemif", NULL, &aemif_clk), - CLK(NULL, "aemif", &aemif_clk), + /* + * The only user of this clock is davinci_nand and it get's it through + * con_id. The nand node itself is created from within the aemif + * driver to guarantee that it's probed after the aemif timing + * parameters are configured. of_dev_auxdata is not accessible from + * the aemif driver and can't be passed to of_platform_populate(). For + * that reason we're leaving the dev_id here as NULL. + */ + CLK(NULL, "aemif", &aemif_nand_clk), CLK("ohci-da8xx", "usb11", &usb11_clk), CLK("musb-da8xx", "usb20", &usb20_clk), CLK("spi_davinci.0", NULL, &spi0_clk),