Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753382Ab1EPI7I (ORCPT ); Mon, 16 May 2011 04:59:08 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:40698 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752976Ab1EPI7G (ORCPT ); Mon, 16 May 2011 04:59:06 -0400 From: Keshava Munegowda To: , , CC: Keshava Munegowda , , , , , Keshava Munegowda Subject: [PATCH v1] omap: usbhs: Fixed the crash during rmmod of ehci and ohci Date: Mon, 16 May 2011 14:24:58 +0530 Message-ID: <1305536098-19871-1-git-send-email-keshava_mgowda@ti.com> X-Mailer: git-send-email 1.6.0.4 MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2188 Lines: 66 From: Keshava Munegowda The disabling of clocks and freeing GPIO are changed to fix the occurrence of the crash of rmmod of ehci and ohci drivers. The GPIOs should be freed after the spin locks are unlocked. Signed-off-by: Keshava Munegowda --- drivers/mfd/omap-usb-host.c | 27 +++++++++++++++++++-------- 1 files changed, 19 insertions(+), 8 deletions(-) diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c index 3ab9ffa..55c5d47 100644 --- a/drivers/mfd/omap-usb-host.c +++ b/drivers/mfd/omap-usb-host.c @@ -994,22 +994,33 @@ static void usbhs_disable(struct device *dev) dev_dbg(dev, "operation timed out\n"); } - if (pdata->ehci_data->phy_reset) { - if (gpio_is_valid(pdata->ehci_data->reset_gpio_port[0])) - gpio_free(pdata->ehci_data->reset_gpio_port[0]); - - if (gpio_is_valid(pdata->ehci_data->reset_gpio_port[1])) - gpio_free(pdata->ehci_data->reset_gpio_port[1]); + if (is_omap_usbhs_rev2(omap)) { + if (is_ehci_tll_mode(pdata->port_mode[0])) + clk_enable(omap->usbtll_p1_fck); + if (is_ehci_tll_mode(pdata->port_mode[1])) + clk_enable(omap->usbtll_p2_fck); + clk_disable(omap->utmi_p2_fck); + clk_disable(omap->utmi_p1_fck); } - clk_disable(omap->utmi_p2_fck); - clk_disable(omap->utmi_p1_fck); clk_disable(omap->usbtll_ick); clk_disable(omap->usbtll_fck); clk_disable(omap->usbhost_fs_fck); clk_disable(omap->usbhost_hs_fck); clk_disable(omap->usbhost_ick); + /* The gpio_free migh sleep; so unlock the spinlock */ + spin_unlock_irqrestore(&omap->lock, flags); + + if (pdata->ehci_data->phy_reset) { + if (gpio_is_valid(pdata->ehci_data->reset_gpio_port[0])) + gpio_free(pdata->ehci_data->reset_gpio_port[0]); + + if (gpio_is_valid(pdata->ehci_data->reset_gpio_port[1])) + gpio_free(pdata->ehci_data->reset_gpio_port[1]); + } + return; + end_disble: spin_unlock_irqrestore(&omap->lock, flags); } -- 1.6.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/