Hi Ulf, On Tue, Sep 13 2011, Ulf Hansson wrote: > During a rescan operation mmc_attach(sd|mmc|sdio) functions are > called. The error handling in these function can trigger a detach > of the bus, which also meant a power off. This is not notified by > the rescan operation which then continues to the next attach function. > > If a power off has been done, the framework must never send any > new commands to the host driver, without first doing a new power up. > This will most likely trigger any host driver to hang. > > Moving power off out of detach and instead handle power off > separately when it is actually needed, solves the issue. > > Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxxxxxx> Thanks very much, merged to mmc-next with Linus W's ACK. - Chris. -- Chris Ball <cjb@xxxxxxxxxx> <http://printf.net/> One Laptop Per Child -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
