From 442258e2ff69276ff767f3703b30ce6a31fdd181 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Thu, 6 Dec 2007 14:47:08 -0500 Subject: [PATCH] USB: use IRQF_DISABLED for HCD interrupt handlers Host controller IRQs are supposed to be serviced with interrupts disabled. This patch (as1026) adds an IRQF_DISABLED flag to all the controller drivers that lack it. It also replaces the spin_lock_irqsave() and spin_unlock_irqrestore() calls in uhci_irq() with simple spin_lock() and spin_unlock(). This fixes Bugzilla #9335. Signed-off-by: Alan Stern Acked-by: David Brownell Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hcd-pci.c | 2 +- drivers/usb/host/ehci-fsl.c | 2 +- drivers/usb/host/ohci-ppc-of.c | 2 +- drivers/usb/host/ohci-ssb.c | 2 +- drivers/usb/host/r8a66597-hcd.c | 2 +- drivers/usb/host/uhci-hcd.c | 9 ++++----- 6 files changed, 9 insertions(+), 10 deletions(-) diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c index 5cf6d5f9acbd..3fb9af80cbf4 100644 --- a/drivers/usb/core/hcd-pci.c +++ b/drivers/usb/core/hcd-pci.c @@ -125,7 +125,7 @@ int usb_hcd_pci_probe (struct pci_dev *dev, const struct pci_device_id *id) pci_set_master (dev); - retval = usb_add_hcd (hcd, dev->irq, IRQF_SHARED); + retval = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED); if (retval != 0) goto err4; return retval; diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c index b7b7bfbce527..430821cb95c8 100644 --- a/drivers/usb/host/ehci-fsl.c +++ b/drivers/usb/host/ehci-fsl.c @@ -122,7 +122,7 @@ int usb_hcd_fsl_probe(const struct hc_driver *driver, temp = in_le32(hcd->regs + 0x1a8); out_le32(hcd->regs + 0x1a8, temp | 0x3); - retval = usb_add_hcd(hcd, irq, IRQF_SHARED); + retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED); if (retval != 0) goto err4; return retval; diff --git a/drivers/usb/host/ohci-ppc-of.c b/drivers/usb/host/ohci-ppc-of.c index 0a7426920150..0c3e6b790b7b 100644 --- a/drivers/usb/host/ohci-ppc-of.c +++ b/drivers/usb/host/ohci-ppc-of.c @@ -142,7 +142,7 @@ ohci_hcd_ppc_of_probe(struct of_device *op, const struct of_device_id *match) ohci_hcd_init(ohci); - rv = usb_add_hcd(hcd, irq, 0); + rv = usb_add_hcd(hcd, irq, IRQF_DISABLED); if (rv == 0) return 0; diff --git a/drivers/usb/host/ohci-ssb.c b/drivers/usb/host/ohci-ssb.c index fe70e72340de..6e9c2d6db887 100644 --- a/drivers/usb/host/ohci-ssb.c +++ b/drivers/usb/host/ohci-ssb.c @@ -160,7 +160,7 @@ static int ssb_ohci_attach(struct ssb_device *dev) hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) goto err_put_hcd; - err = usb_add_hcd(hcd, dev->irq, IRQF_SHARED); + err = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED); if (err) goto err_iounmap; diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c index ae8ec4474eb8..0ce2fc5e396b 100644 --- a/drivers/usb/host/r8a66597-hcd.c +++ b/drivers/usb/host/r8a66597-hcd.c @@ -2197,7 +2197,7 @@ static int __init r8a66597_probe(struct platform_device *pdev) INIT_LIST_HEAD(&r8a66597->child_device); hcd->rsrc_start = res->start; - ret = usb_add_hcd(hcd, irq, 0); + ret = usb_add_hcd(hcd, irq, IRQF_DISABLED); if (ret != 0) { err("Failed to add hcd"); goto clean_up; diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c index 4db17f75f4f1..ec987897b8ed 100644 --- a/drivers/usb/host/uhci-hcd.c +++ b/drivers/usb/host/uhci-hcd.c @@ -378,7 +378,6 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd) { struct uhci_hcd *uhci = hcd_to_uhci(hcd); unsigned short status; - unsigned long flags; /* * Read the interrupt status, and write it back to clear the @@ -398,7 +397,7 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd) dev_err(uhci_dev(uhci), "host controller process " "error, something bad happened!\n"); if (status & USBSTS_HCH) { - spin_lock_irqsave(&uhci->lock, flags); + spin_lock(&uhci->lock); if (uhci->rh_state >= UHCI_RH_RUNNING) { dev_err(uhci_dev(uhci), "host controller halted, " @@ -415,16 +414,16 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd) * pending unlinks */ mod_timer(&hcd->rh_timer, jiffies); } - spin_unlock_irqrestore(&uhci->lock, flags); + spin_unlock(&uhci->lock); } } if (status & USBSTS_RD) usb_hcd_poll_rh_status(hcd); else { - spin_lock_irqsave(&uhci->lock, flags); + spin_lock(&uhci->lock); uhci_scan_schedule(uhci); - spin_unlock_irqrestore(&uhci->lock, flags); + spin_unlock(&uhci->lock); } return IRQ_HANDLED;