From 83a798207361cc26385187b2e71efa2b5d75de7f Mon Sep 17 00:00:00 2001 From: Geoff Levand Date: Fri, 22 Aug 2008 14:13:00 -0700 Subject: [PATCH] USB: fix hcd interrupt disabling Commit de85422b94ddb23c021126815ea49414047c13dc, 'USB: fix interrupt disabling for HCDs with shared interrupt handlers' changed usb_add_hcd() to strip IRQF_DISABLED from irqflags prior to calling request_irq() with the justification that such a removal was necessary for shared interrupts to work properly. Unfortunately, the change in that commit unconditionally removes the IRQF_DISABLED flag, causing problems on platforms that don't use a shared interrupt but require IRQF_DISABLED. This change adds a check for IRQF_SHARED prior to removing the IRQF_DISABLED flag. Fixes the PS3 system startup hang reported with recent Fedora and OpenSUSE kernels. Note that this problem is hidden when CONFIG_LOCKDEP=y (ps3_defconfig), as local_irq_enable_in_hardirq() is defined as a null statement for that config. CC: stable Signed-off-by: Geoff Levand Cc: Alan Stern Cc: Stefan Becker Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hcd.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 8abd4e59bf4a..8ab389dca2b9 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -1876,7 +1876,8 @@ int usb_add_hcd(struct usb_hcd *hcd, * with IRQF_SHARED. As usb_hcd_irq() will always disable * interrupts we can remove it here. */ - irqflags &= ~IRQF_DISABLED; + if (irqflags & IRQF_SHARED) + irqflags &= ~IRQF_DISABLED; snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", hcd->driver->description, hcd->self.busnum); -- 2.20.1