This is a note to let you know that I've just added the patch titled
mfd: Fix omap usbhs crash when rmmoding ehci or ohci
to the 2.6.39-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mfd-fix-omap-usbhs-crash-when-rmmoding-ehci-or-ohci.patch
and it can be found in the queue-2.6.39 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 6eb6fbbf3eca6dfba73e72de5ab2eeb52ae41f7a Mon Sep 17 00:00:00 2001
From: Keshava Munegowda <[email protected]>
Date: Mon, 16 May 2011 14:24:58 +0530
Subject: mfd: Fix omap usbhs crash when rmmoding ehci or ohci
From: Keshava Munegowda <[email protected]>
commit 6eb6fbbf3eca6dfba73e72de5ab2eeb52ae41f7a upstream.
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 <[email protected]>
Acked-by: Felipe Balbi <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/mfd/omap-usb-host.c | 27 +++++++++++++++++++--------
1 file changed, 19 insertions(+), 8 deletions(-)
--- 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_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);
}
Patches currently in stable-queue which might be from [email protected] are
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