diff options
Diffstat (limited to 'drivers/gpu/drm/xe/xe_devcoredump.c')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_devcoredump.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/gpu/drm/xe/xe_devcoredump.c b/drivers/gpu/drm/xe/xe_devcoredump.c index a9e618abf8ac..7a8af2311318 100644 --- a/drivers/gpu/drm/xe/xe_devcoredump.c +++ b/drivers/gpu/drm/xe/xe_devcoredump.c @@ -177,6 +177,8 @@ static ssize_t xe_devcoredump_read(char *buffer, loff_t offset, struct xe_devcoredump *coredump = data; struct xe_devcoredump_snapshot *ss; ssize_t byte_copied; + u32 chunk_offset; + ssize_t new_chunk_position; if (!coredump) return -ENODEV; @@ -201,10 +203,14 @@ static ssize_t xe_devcoredump_read(char *buffer, loff_t offset, return 0; } + new_chunk_position = div_u64_rem(offset, + XE_DEVCOREDUMP_CHUNK_MAX, + &chunk_offset); + if (offset >= ss->read.chunk_position + XE_DEVCOREDUMP_CHUNK_MAX || offset < ss->read.chunk_position) { - ss->read.chunk_position = - ALIGN_DOWN(offset, XE_DEVCOREDUMP_CHUNK_MAX); + ss->read.chunk_position = new_chunk_position * + XE_DEVCOREDUMP_CHUNK_MAX; __xe_devcoredump_read(ss->read.buffer, XE_DEVCOREDUMP_CHUNK_MAX, @@ -213,8 +219,7 @@ static ssize_t xe_devcoredump_read(char *buffer, loff_t offset, byte_copied = count < ss->read.size - offset ? count : ss->read.size - offset; - memcpy(buffer, ss->read.buffer + - (offset % XE_DEVCOREDUMP_CHUNK_MAX), byte_copied); + memcpy(buffer, ss->read.buffer + chunk_offset, byte_copied); mutex_unlock(&coredump->lock); |