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perf tools: Handle EINTR error for readn/writen
Those readn/writen functions are to ensure read/write does I/O for a given size exactly. But ion() - its implementation - does not handle in case it returns prematurely due to a signal. As it's not an error itself so just retry the operation. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1398346054-3322-1-git-send-email-namhyung@kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
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@ -166,6 +166,8 @@ static ssize_t ion(bool is_read, int fd, void *buf, size_t n)
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ssize_t ret = is_read ? read(fd, buf, left) :
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write(fd, buf, left);
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if (ret < 0 && errno == EINTR)
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continue;
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if (ret <= 0)
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return ret;
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