/* * dir.c * * Copyright (c) 1999 Al Smith */ #include #include "efs.h" static int efs_readdir(struct file *, struct dir_context *); const struct file_operations efs_dir_operations = { .llseek = generic_file_llseek, .read = generic_read_dir, .iterate_shared = efs_readdir, }; const struct inode_operations efs_dir_inode_operations = { .lookup = efs_lookup, }; static int efs_readdir(struct file *file, struct dir_context *ctx) { struct inode *inode = file_inode(file); efs_block_t block; int slot; if (inode->i_size & (EFS_DIRBSIZE-1)) pr_warn("%s(): directory size not a multiple of EFS_DIRBSIZE\n", __func__); /* work out where this entry can be found */ block = ctx->pos >> EFS_DIRBSIZE_BITS; /* each block contains at most 256 slots */ slot = ctx->pos & 0xff; /* look at all blocks */ while (block < inode->i_blocks) { struct efs_dir *dirblock; struct buffer_head *bh; /* read the dir block */ bh = sb_bread(inode->i_sb, efs_bmap(inode, block)); if (!bh) { pr_err("%s(): failed to read dir block %d\n", __func__, block); break; } dirblock = (struct efs_dir *) bh->b_data; if (be16_to_cpu(dirblock->magic) != EFS_DIRBLK_MAGIC) { pr_err("%s(): invalid directory block\n", __func__); brelse(bh); break; } for (; slot < dirblock->slots; slot++) { struct efs_dentry *dirslot; efs_ino_t inodenum; const char *nameptr; int namelen; if (dirblock->space[slot] == 0) continue; dirslot = (struct efs_dentry *) (((char *) bh->b_data) + EFS_SLOTAT(dirblock, slot)); inodenum = be32_to_cpu(dirslot->inode); namelen = dirslot->namelen; nameptr = dirslot->name; pr_debug("%s(): block %d slot %d/%d: inode %u, name \"%s\", namelen %u\n", __func__, block, slot, dirblock->slots-1, inodenum, nameptr, namelen); if (!namelen) continue; /* found the next entry */ ctx->pos = (block << EFS_DIRBSIZE_BITS) | slot; /* sanity check */ if (nameptr - (char *) dirblock + namelen > EFS_DIRBSIZE) { pr_warn("directory entry %d exceeds directory block\n", slot); continue; } /* copy filename and data in dirslot */ if (!dir_emit(ctx, nameptr, namelen, inodenum, DT_UNKNOWN)) { brelse(bh); return 0; } } brelse(bh); slot = 0; block++; } ctx->pos = (block << EFS_DIRBSIZE_BITS) | slot; return 0; } idden' name='id' value='628f07d33c1f2e7bf31e0a4a988bb07914bd5e73'/>
path: root/include/dt-bindings/clock/r8a7795-cpg-mssr.h
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authorEyal Itkin <eyal.itkin@gmail.com>2017-02-07 16:43:05 +0300
committerDoug Ledford <dledford@redhat.com>2017-02-08 12:28:30 -0500
commit628f07d33c1f2e7bf31e0a4a988bb07914bd5e73 (patch)
treec228c66498f9a4562093fbbf80a41bcede0c06f2 /include/dt-bindings/clock/r8a7795-cpg-mssr.h
parentb4cfe3971f6eab542dd7ecc398bfa1aeec889934 (diff)
IB/rxe: Fix resid update
Update the response's resid field when larger than MTU, instead of only updating the local resid variable. Fixes: 8700e3e7c485 ("Soft RoCE driver") Signed-off-by: Eyal Itkin <eyal.itkin@gmail.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'include/dt-bindings/clock/r8a7795-cpg-mssr.h')
/O, as hangs in blk_mq_freeze_queue_wait where percpu_ref_kill (blk_mq_freeze_queue_start) raced with percpu_ref_tryget (blk_mq_timeout_work). Sample stack trace: __switch_to+0x2c0/0x450 __schedule+0x2f8/0x970 schedule+0x48/0xc0 blk_mq_freeze_queue_wait+0x94/0x120 blk_mq_queue_reinit_work+0xb8/0x180 blk_mq_queue_reinit_prepare+0x84/0xa0 cpuhp_invoke_callback+0x17c/0x600 cpuhp_up_callbacks+0x58/0x150 _cpu_up+0xf0/0x1c0 do_cpu_up+0x120/0x150 cpu_subsys_online+0x64/0xe0 device_online+0xb4/0x120 online_store+0xb4/0xc0 dev_attr_store+0x68/0xa0 sysfs_kf_write+0x80/0xb0 kernfs_fop_write+0x17c/0x250 __vfs_write+0x6c/0x1e0 vfs_write+0xd0/0x270 SyS_write+0x6c/0x110 system_call+0x38/0xe0 Examination of the queue showed a single reference (no PERCPU_COUNT_BIAS, and __PERCPU_REF_DEAD, __PERCPU_REF_ATOMIC set) and no requests. However, conditions at the time of the race are count of PERCPU_COUNT_BIAS + 0 and __PERCPU_REF_DEAD and __PERCPU_REF_ATOMIC set. The fix is to make the tryget routines use an actual boolean internally instead of the atomic long result truncated to a int. Fixes: e625305b3907 percpu-refcount: make percpu_ref based on longs instead of ints Link: https://bugzilla.kernel.org/show_bug.cgi?id=190751 Signed-off-by: Douglas Miller <dougmill@linux.vnet.ibm.com> Reviewed-by: Jens Axboe <axboe@fb.com> Signed-off-by: Tejun Heo <tj@kernel.org> Fixes: e625305b3907 ("percpu-refcount: make percpu_ref based on longs instead of ints") Cc: stable@vger.kernel.org # v3.18+
Diffstat (limited to 'drivers/usb/chipidea')