For any of you who are using flash with the cfi driver, this may be of your interrest: When using the cfi (common flash interface) driver, every word written to the flash chips is followed by a operation complete poll. This poll is intended to have a timeout of 1 ms. However this timeout is calculated by HZ/1000, which happends to be 0 because HZ < 1000. The result of this is that there will be just one poll for operation complete. If this single poll fails, the kernel panics. I have not had the time to investigate this panic further. Instead, I have made a workaround that increases this timeout to HZ (1 second). 1 second is far more than needed, but is preferred over a panic. The patch is available at http://www.jp-embedded.com.