As a professional developer with Linux drivers deployed in the field, I can honestly say there is no way I could do it without this book; or at least not without a lot of headache, guesswork, uncertainty, inefficiency, and more time than any manager is willing to allot for a project! From the 1st edition to the 3rd, "Linux Device Drivers" is the bible of Linux device driver development.
My only criticism of the book (all editions) is Chapter 2, which describes the build process. This is the chapter that always leaves the most questions unanswered. For the 3rd edition in particular, the content is certainly sufficient for small-scale projects and hobbyists, but it is not sufficient for production environments with large development trees. For anything significant, be prepared to resort to trial and error.
On the other hand, I'd hate to try to build even the simplest driver without the information that is presented in Chapter 2!
Not only is this book a "must-read" for any Linux driver developer, but it is also an indispensible desk resource that will be referred to often... and frequently borrowed by colleagues throughout the office! This book isn't a dust collector.
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