/************************************************************************ * * io_edgeport.h Edgeport Linux Interface definitions * * Copyright (C) 2000 Inside Out Networks, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * ************************************************************************/ #if !defined(_IO_EDGEPORT_H_) #define _IO_EDGEPORT_H_ #define MAX_RS232_PORTS 8 /* Max # of RS-232 ports per device */ /* typedefs that the insideout headers need */ #ifndef LOW8 #define LOW8(a) ((unsigned char)(a & 0xff)) #endif #ifndef HIGH8 #define HIGH8(a) ((unsigned char)((a & 0xff00) >> 8)) #endif #ifndef __KERNEL__ #define __KERNEL__ #endif #include "io_usbvend.h" /* The following table is used to map the USBx port number to * the device serial number (or physical USB path), */ #define MAX_EDGEPORTS 64 struct comMapper { char SerialNumber[MAX_SERIALNUMBER_LEN+1]; /* Serial number/usb path */ int numPorts; /* Number of ports */ int Original[MAX_RS232_PORTS]; /* Port numbers set by IOCTL */ int Port[MAX_RS232_PORTS]; /* Actual used port numbers */ }; #define EDGEPORT_CONFIG_DEVICE "/proc/edgeport" /* /proc/edgeport Interface * This interface uses read/write/lseek interface to talk to the edgeport driver * the following read functions are supported: */ #define PROC_GET_MAPPING_TO_PATH 1 #define PROC_GET_COM_ENTRY 2 #define PROC_GET_EDGE_MANUF_DESCRIPTOR 3 #define PROC_GET_BOOT_DESCRIPTOR 4 #define PROC_GET_PRODUCT_INFO 5 #define PROC_GET_STRINGS 6 #define PROC_GET_CURRENT_COM_MAPPING 7 /* The parameters to the lseek() for the read is: */ #define PROC_READ_SETUP(Command, Argument) ((Command) + ((Argument)<<8)) /* the following write functions are supported: */ #define PROC_SET_COM_MAPPING 1 #define PROC_SET_COM_ENTRY 2 /* The following structure is passed to the write */ struct procWrite { int Command; union { struct comMapper Entry; int ComMappingBasedOnUSBPort; /* Boolean value */ } u; }; /* * Product information read from the Edgeport */ struct edgeport_product_info { __u16 ProductId; /* Product Identifier */ __u8 NumPorts; /* Number of ports on edgeport */ __u8 ProdInfoVer; /* What version of structure is this? */ __u32 IsServer :1; /* Set if Server */ __u32 IsRS232 :1; /* Set if RS-232 ports exist */ __u32 IsRS422 :1; /* Set if RS-422 ports exist */ __u32 IsRS485 :1; /* Set if RS-485 ports exist */ __u32 IsReserved :28; /* Reserved for later expansion */ __u8 RomSize; /* Size of ROM/E2PROM in K */ __u8 RamSize; /* Size of external RAM in K */ __u8 CpuRev; /* CPU revision level (chg only if s/w visible) */ __u8 BoardRev; /* PCB revision level (chg only if s/w visible) */ __u8 BootMajorVersion; /* Boot Firmware version: xx. */ __u8 BootMinorVersion; /* yy. */ __le16 BootBuildNumber; /* zzzz (LE format) */ __u8 FirmwareMajorVersion; /* Operational Firmware version:xx. */ __u8 FirmwareMinorVersion; /* yy. */ __le16 FirmwareBuildNumber; /* zzzz (LE format) */ __u8 ManufactureDescDate[3]; /* MM/DD/YY when descriptor template was compiled */ __u8 HardwareType; __u8 iDownloadFile; /* What to download to EPiC device */ __u8 EpicVer; /* What version of EPiC spec this device supports */ struct edge_compatibility_bits Epic; }; /* * Edgeport Stringblock String locations */ #define EDGESTRING_MANUFNAME 1 /* Manufacture Name */ #define EDGESTRING_PRODNAME 2 /* Product Name */ #define EDGESTRING_SERIALNUM 3 /* Serial Number */ #define EDGESTRING_ASSEMNUM 4 /* Assembly Number */ #define EDGESTRING_OEMASSEMNUM 5 /* OEM Assembly Number */ #define EDGESTRING_MANUFDATE 6 /* Manufacture Date */ #define EDGESTRING_ORIGSERIALNUM 7 /* Serial Number */ struct string_block { __u16 NumStrings; /* Number of strings in block */ __u16 Strings[1]; /* Start of string block */ }; #endif >space:mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2017-01-29 13:50:06 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-29 13:50:06 -0800
commit39cb2c9a316e77f6dfba96c543e55b6672d5a37e (patch)
tree98fe974ee4e20121253de7f61fc8d01bdb3821c1 /include/dt-bindings/clock/r8a7740-clock.h
parent2c5d9555d6d937966d79d4c6529a5f7b9206e405 (diff)
drm/i915: Check for NULL i915_vma in intel_unpin_fb_obj()
I've seen this trigger twice now, where the i915_gem_object_to_ggtt() call in intel_unpin_fb_obj() returns NULL, resulting in an oops immediately afterwards as the (inlined) call to i915_vma_unpin_fence() tries to dereference it. It seems to be some race condition where the object is going away at shutdown time, since both times happened when shutting down the X server. The call chains were different: - VT ioctl(KDSETMODE, KD_TEXT): intel_cleanup_plane_fb+0x5b/0xa0 [i915] drm_atomic_helper_cleanup_planes+0x6f/0x90 [drm_kms_helper] intel_atomic_commit_tail+0x749/0xfe0 [i915] intel_atomic_commit+0x3cb/0x4f0 [i915] drm_atomic_commit+0x4b/0x50 [drm] restore_fbdev_mode+0x14c/0x2a0 [drm_kms_helper] drm_fb_helper_restore_fbdev_mode_unlocked+0x34/0x80 [drm_kms_helper] drm_fb_helper_set_par+0x2d/0x60 [drm_kms_helper] intel_fbdev_set_par+0x18/0x70 [i915] fb_set_var+0x236/0x460 fbcon_blank+0x30f/0x350 do_unblank_screen+0xd2/0x1a0 vt_ioctl+0x507/0x12a0 tty_ioctl+0x355/0xc30 do_vfs_ioctl+0xa3/0x5e0 SyS_ioctl+0x79/0x90 entry_SYSCALL_64_fastpath+0x13/0x94 - i915 unpin_work workqueue: intel_unpin_work_fn+0x58/0x140 [i915] process_one_work+0x1f1/0x480 worker_thread+0x48/0x4d0 kthread+0x101/0x140 and this patch purely papers over the issue by adding a NULL pointer check and a WARN_ON_ONCE() to avoid the oops that would then generally make the machine unresponsive. Other callers of i915_gem_object_to_ggtt() seem to also check for the returned pointer being NULL and warn about it, so this clearly has happened before in other places. [ Reported it originally to the i915 developers on Jan 8, applying the ugly workaround on my own now after triggering the problem for the second time with no feedback. This is likely to be the same bug reported as https://bugs.freedesktop.org/show_bug.cgi?id=98829 https://bugs.freedesktop.org/show_bug.cgi?id=99134 which has a patch for the underlying problem, but it hasn't gotten to me, so I'm applying the workaround. ] Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Imre Deak <imre.deak@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/dt-bindings/clock/r8a7740-clock.h')