Jun Sun <jsun@xxxxxxxxxx> wrote: > > > I found this problem on a MIPS machine. The problem is > likely to happen on other register-rich RISC arches too. > > cmdcnt needs to be volatile since it is modified by > irq routine and read by normal process context. volatile is not the preferred way to fix this up. This points at either a locking error in the psmouse driver or a missing "memory" thingy in the mips port somewhere. Please describe the bug which led to this patch. Where was it getting stuck?
