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Date: Thu, 27 Mar 2008 10:25:46 +1100 From: Benjamin Herrenschmidt <benh@...nel.crashing.org> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: Thomas Meyer <thomas@...3r.de>, Ingo Molnar <mingo@...e.hu>, Stefan Richter <stefanr@...6.in-berlin.de>, Thomas Gleixner <tglx@...utronix.de>, Ivan Kokshaysky <ink@...assic.park.msu.ru>, "Rafael J. Wysocki" <rjw@...k.pl>, LKML <linux-kernel@...r.kernel.org>, Adrian Bunk <bunk@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>, Natalie Protasevich <protasnb@...il.com> Subject: Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Reported regressions from 2.6.24) While at it, here's an updated version of my patch that applies on top of yesterday git. I also turned "len" into a resource_size_t as it's technically the right type to use in the generic code, even if it makes little sense to try to map more than 32 bits on a 32 bits arch :-) Maybe we should actually add some kind of warning here or error checking though rather than just cropping the value. I "fixed" all archs even those that don't technically need it (like real 64 bits one) for consistency (and who knows if they ever want to make resource_size_t even bigger ...). The patch actually fixes at least one bug in the case of arch/ppc which needs that change. --- iomap: Fix 64 bits resources on 32 bits Almost all implementations of pci_iomap() in the kernel, including the generic lib/iomap.c one, copies the content of a struct resource into unsigned long's which will break on 32 bits platforms with 64 bits resources. This fixes all definitions of pci_iomap() to use resource_size_t. I also "fixed" the 64bits arch for consistency. Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org> --- Index: linux-work/lib/iomap.c =================================================================== --- linux-work.orig/lib/iomap.c 2008-03-26 10:39:25.000000000 +1100 +++ linux-work/lib/iomap.c 2008-03-27 10:20:14.000000000 +1100 @@ -257,7 +257,7 @@ EXPORT_SYMBOL(ioport_unmap); void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { resource_size_t start = pci_resource_start(dev, bar); - unsigned long len = pci_resource_len(dev, bar); + resource_size_t len = pci_resource_len(dev, bar); unsigned long flags = pci_resource_flags(dev, bar); if (!len || !start) Index: linux-work/arch/alpha/kernel/pci.c =================================================================== --- linux-work.orig/arch/alpha/kernel/pci.c 2007-09-28 11:42:04.000000000 +1000 +++ linux-work/arch/alpha/kernel/pci.c 2008-03-27 10:19:59.000000000 +1100 @@ -547,8 +547,8 @@ sys_pciconfig_iobase(long which, unsigne void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { - unsigned long start = pci_resource_start(dev, bar); - unsigned long len = pci_resource_len(dev, bar); + resource_size_t start = pci_resource_start(dev, bar); + resource_size_t len = pci_resource_len(dev, bar); unsigned long flags = pci_resource_flags(dev, bar); if (!len || !start) Index: linux-work/arch/arm/mm/iomap.c =================================================================== --- linux-work.orig/arch/arm/mm/iomap.c 2007-07-27 13:44:41.000000000 +1000 +++ linux-work/arch/arm/mm/iomap.c 2008-03-27 10:19:59.000000000 +1100 @@ -26,8 +26,8 @@ EXPORT_SYMBOL(ioport_unmap); #ifdef CONFIG_PCI void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { - unsigned long start = pci_resource_start(dev, bar); - unsigned long len = pci_resource_len(dev, bar); + resource_size_t start = pci_resource_start(dev, bar); + resource_size_t len = pci_resource_len(dev, bar); unsigned long flags = pci_resource_flags(dev, bar); if (!len || !start) Index: linux-work/arch/frv/mb93090-mb00/pci-iomap.c =================================================================== --- linux-work.orig/arch/frv/mb93090-mb00/pci-iomap.c 2007-07-27 13:44:41.000000000 +1000 +++ linux-work/arch/frv/mb93090-mb00/pci-iomap.c 2008-03-27 10:19:59.000000000 +1100 @@ -13,8 +13,8 @@ void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { - unsigned long start = pci_resource_start(dev, bar); - unsigned long len = pci_resource_len(dev, bar); + resource_size_t start = pci_resource_start(dev, bar); + resource_size_t len = pci_resource_len(dev, bar); unsigned long flags = pci_resource_flags(dev, bar); if (!len || !start) Index: linux-work/arch/mips/lib/iomap-pci.c =================================================================== --- linux-work.orig/arch/mips/lib/iomap-pci.c 2007-09-28 11:42:05.000000000 +1000 +++ linux-work/arch/mips/lib/iomap-pci.c 2008-03-27 10:19:59.000000000 +1100 @@ -45,8 +45,8 @@ static void __iomem *ioport_map_pci(stru */ void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { - unsigned long start = pci_resource_start(dev, bar); - unsigned long len = pci_resource_len(dev, bar); + resource_size_t start = pci_resource_start(dev, bar); + resource_size_t len = pci_resource_len(dev, bar); unsigned long flags = pci_resource_flags(dev, bar); if (!len || !start) Index: linux-work/arch/parisc/lib/iomap.c =================================================================== --- linux-work.orig/arch/parisc/lib/iomap.c 2007-07-27 13:44:42.000000000 +1000 +++ linux-work/arch/parisc/lib/iomap.c 2008-03-27 10:19:59.000000000 +1100 @@ -438,8 +438,8 @@ void ioport_unmap(void __iomem *addr) /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { - unsigned long start = pci_resource_start(dev, bar); - unsigned long len = pci_resource_len(dev, bar); + resource_size_t start = pci_resource_start(dev, bar); + resource_size_t len = pci_resource_len(dev, bar); unsigned long flags = pci_resource_flags(dev, bar); if (!len || !start) Index: linux-work/arch/sh/drivers/pci/pci.c =================================================================== --- linux-work.orig/arch/sh/drivers/pci/pci.c 2008-03-19 13:52:27.000000000 +1100 +++ linux-work/arch/sh/drivers/pci/pci.c 2008-03-27 10:19:59.000000000 +1100 @@ -191,8 +191,8 @@ void __init pcibios_update_irq(struct pc void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { - unsigned long start = pci_resource_start(dev, bar); - unsigned long len = pci_resource_len(dev, bar); + resource_size_t start = pci_resource_start(dev, bar); + resource_size_t len = pci_resource_len(dev, bar); unsigned long flags = pci_resource_flags(dev, bar); if (unlikely(!len || !start)) Index: linux-work/arch/mn10300/unit-asb2305/pci-iomap.c =================================================================== --- linux-work.orig/arch/mn10300/unit-asb2305/pci-iomap.c 2008-03-19 13:52:26.000000000 +1100 +++ linux-work/arch/mn10300/unit-asb2305/pci-iomap.c 2008-03-27 10:19:59.000000000 +1100 @@ -16,8 +16,8 @@ */ void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { - unsigned long start = pci_resource_start(dev, bar); - unsigned long len = pci_resource_len(dev, bar); + resource_size_t start = pci_resource_start(dev, bar); + resource_size_t len = pci_resource_len(dev, bar); unsigned long flags = pci_resource_flags(dev, bar); if (!len || !start) Index: linux-work/arch/ppc/kernel/pci.c =================================================================== --- linux-work.orig/arch/ppc/kernel/pci.c 2007-09-28 11:42:05.000000000 +1000 +++ linux-work/arch/ppc/kernel/pci.c 2008-03-27 10:19:59.000000000 +1100 @@ -1176,8 +1176,8 @@ void __init pci_init_resource(struct res void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max) { - unsigned long start = pci_resource_start(dev, bar); - unsigned long len = pci_resource_len(dev, bar); + resource_size_t start = pci_resource_start(dev, bar); + resource_size_t len = pci_resource_len(dev, bar); unsigned long flags = pci_resource_flags(dev, bar); if (!len) Index: linux-work/arch/sparc/lib/iomap.c =================================================================== --- linux-work.orig/arch/sparc/lib/iomap.c 2007-07-27 13:44:42.000000000 +1000 +++ linux-work/arch/sparc/lib/iomap.c 2008-03-27 10:19:59.000000000 +1100 @@ -21,8 +21,8 @@ EXPORT_SYMBOL(ioport_unmap); /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { - unsigned long start = pci_resource_start(dev, bar); - unsigned long len = pci_resource_len(dev, bar); + resource_size_t start = pci_resource_start(dev, bar); + resource_size_t len = pci_resource_len(dev, bar); unsigned long flags = pci_resource_flags(dev, bar); if (!len || !start) Index: linux-work/arch/sparc64/lib/iomap.c =================================================================== --- linux-work.orig/arch/sparc64/lib/iomap.c 2007-07-27 13:44:42.000000000 +1000 +++ linux-work/arch/sparc64/lib/iomap.c 2008-03-27 10:19:59.000000000 +1100 @@ -21,8 +21,8 @@ EXPORT_SYMBOL(ioport_unmap); /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { - unsigned long start = pci_resource_start(dev, bar); - unsigned long len = pci_resource_len(dev, bar); + resource_size_t start = pci_resource_start(dev, bar); + resource_size_t len = pci_resource_len(dev, bar); unsigned long flags = pci_resource_flags(dev, bar); if (!len || !start) Index: linux-work/arch/v850/kernel/rte_mb_a_pci.c =================================================================== --- linux-work.orig/arch/v850/kernel/rte_mb_a_pci.c 2008-03-03 11:58:41.000000000 +1100 +++ linux-work/arch/v850/kernel/rte_mb_a_pci.c 2008-03-27 10:19:59.000000000 +1100 @@ -790,8 +790,8 @@ pci_free_consistent (struct pci_dev *pde void __iomem *pci_iomap (struct pci_dev *dev, int bar, unsigned long max) { - unsigned long start = pci_resource_start (dev, bar); - unsigned long len = pci_resource_len (dev, bar); + resource_size_t start = pci_resource_start (dev, bar); + resource_size_t len = pci_resource_len (dev, bar); if (!start || len == 0) return 0; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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