Messages in this thread Patch in this message | | | Date | Fri, 22 Oct 2010 19:29:53 +0200 | From | Nicolas Kaiser <> | Subject | [PATCH] dma/coh901318: fix copy_to_user error path |
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If copy_to_user fails, the assigned error code instantly gets overwritten, and the failure apparently ignored. Moreover, shouldn't the error code be -EFAULT instead of -EINVAL?
Signed-off-by: Nicolas Kaiser <nikai@nikai.net> --- drivers/dma/coh901318.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c index ae2b871..eac8867 100644 --- a/drivers/dma/coh901318.c +++ b/drivers/dma/coh901318.c @@ -140,8 +140,10 @@ static int coh901318_debugfs_read(struct file *file, char __user *buf, if (count > dev_size - *f_pos) count = dev_size - *f_pos; - if (copy_to_user(buf, dev_buf + *f_pos, count)) - ret = -EINVAL; + if (copy_to_user(buf, dev_buf + *f_pos, count)) { + ret = -EFAULT; + goto out; + } ret = count; *f_pos += count; -- 1.7.2.2
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