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path: root/drivers/iommu/omap-iommu-debug.c
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* simple_open: automatically convert to simple_open()Stephen Boyd2012-04-051-8/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Many users of debugfs copy the implementation of default_open() when they want to support a custom read/write function op. This leads to a proliferation of the default_open() implementation across the entire tree. Now that the common implementation has been consolidated into libfs we can replace all the users of this function with simple_open(). This replacement was done with the following semantic patch: <smpl> @ open @ identifier open_f != simple_open; identifier i, f; @@ -int open_f(struct inode *i, struct file *f) -{ ( -if (i->i_private) -f->private_data = i->i_private; | -f->private_data = i->i_private; ) -return 0; -} @ has_open depends on open @ identifier fops; identifier open.open_f; @@ struct file_operations fops = { ... -.open = open_f, +.open = simple_open, ... }; </smpl> [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* iommu/omap: fix NULL pointer dereferenceOhad Ben-Cohen2012-02-241-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix this: root@omap4430-panda:~# cat /debug/iommu/ducati/mem [ 62.725708] Unable to handle kernel NULL pointer dereference at virtual addre ss 0000001c [ 62.725708] pgd = e6240000 [ 62.737091] [0000001c] *pgd=a7168831, *pte=00000000, *ppte=00000000 [ 62.743682] Internal error: Oops: 17 [#1] SMP [ 62.743682] Modules linked in: omap_iommu_debug omap_iovmm virtio_rpmsg_bus o map_remoteproc remoteproc virtio_ring virtio mailbox_mach mailbox [ 62.743682] CPU: 0 Not tainted (3.3.0-rc1-00265-g382f84e-dirty #682) [ 62.743682] PC is at debug_read_mem+0x5c/0xac [omap_iommu_debug] [ 62.743682] LR is at 0x1004 [ 62.777832] pc : [<bf033178>] lr : [<00001004>] psr: 60000013 [ 62.777832] sp : e72c7f40 ip : c0763c00 fp : 00000001 [ 62.777832] r10: 00000000 r9 : 00000000 r8 : e72c7f80 [ 62.777832] r7 : e6ffdc08 r6 : bed1ac78 r5 : 00001000 r4 : e7276000 [ 62.777832] r3 : e60f3460 r2 : 00000000 r1 : e60f38c0 r0 : 00000000 [ 62.777832] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 62.816375] Control: 10c53c7d Table: a624004a DAC: 00000015 [ 62.816375] Process cat (pid: 1176, stack limit = 0xe72c62f8) [ 62.828369] Stack: (0xe72c7f40 to 0xe72c8000) ... [ 62.884185] [<bf033178>] (debug_read_mem+0x5c/0xac [omap_iommu_debug]) from [<c010e354>] (vfs_read+0xac/0x130) [ 62.884185] [<c010e354>] (vfs_read+0xac/0x130) from [<c010e4a8>] (sys_read+0x40/0x70) [ 62.884185] [<c010e4a8>] (sys_read+0x40/0x70) from [<c0014a00>] (ret_fast_syscall+0x0/0x3c) Fix also its 'echo bla > /debug/iommu/ducati/mem' Oops sibling, too. Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Hiroshi Doyu <hdoyu@nvidia.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Joerg Roedel <Joerg.Roedel@amd.com> Cc: stable@vger.kernel.org Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* iommu/omap: fix erroneous omap-iommu-debug API callsOhad Ben-Cohen2012-02-241-12/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Adapt omap-iommu-debug to the latest omap-iommu API changes, which were introduced by commit fabdbca "iommu/omap: eliminate the public omap_find_iommu_device() method". In a nutshell, iommu users are not expected to provide the omap_iommu handle anymore - instead, iommus are attached using their user's device handle. omap-iommu-debug is a hybrid beast though: it invokes both public and private omap iommu API, so fix it as necessary (otherwise a crash is imminent). Note: omap-iommu-debug is a bit disturbing, as it fiddles with internal omap iommu data and requires exposing API which is otherwise not needed. It should better be more tightly coupled with omap-iommu, to prevent further bit rot and avoid exposing redundant API. Naturally that's out of scope for the -rc cycle, so for now just fix the obvious. Reported-by: Russell King <linux@arm.linux.org.uk> Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Hiroshi Doyu <hdoyu@nvidia.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Joerg Roedel <Joerg.Roedel@amd.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* iommu: omap: Fix compile failureMing Lei2011-11-081-0/+1
| | | | | | | | Fix compile failure in drivers/iommu/omap-iommu-debug.c because of missing module.h include. Signed-off-by: Ming Lei <tom.leiming@gmail.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* omap: iommu: omapify 'struct iommu' and exposed APIOhad Ben-Cohen2011-08-261-17/+17
| | | | | | | | | | | | | | Prepend 'omap_' to OMAP's 'struct iommu' and exposed API, to prevent namespace pollution and generally to improve readability of the code that still uses the driver directly. Update the users as needed as well. Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
* omap: iommu/iovmm: move to dedicated iommu folderOhad Ben-Cohen2011-08-261-0/+418
Move OMAP's iommu drivers to the dedicated iommu drivers folder. While OMAP's iovmm (virtual memory manager) driver does not strictly belong to the iommu drivers folder, move it there as well, because it's by no means OMAP-specific (in concept. technically it is still coupled with OMAP's iommu). Eventually, iovmm will be completely replaced with the generic, iommu-based, dma-mapping API. Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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