Hi, This is a resurrection of a *very* old patch [1] from 2011 that apparently never landed upstream. One of our customers is reporting exactly the failure described in $SUBJECT, and mentioned that applying this change in their downstream kernel allows their mass storage function to successfully connect to OS X hosts. So perhaps we can finally try to merge it, better late than never. The original series was applicable to both the mass_storage and now-defunct file_storage gadget functions. So I've simply squashed the changes into a single patch applicable to f_mass_storage.c @Roger I've kept the authorship email from your original submission since it was retained from "git am". I'm not sure if it's ok/appropriate to update it to your current @kernel.org address? [1] https://lore.kernel.org/lkml/1302015569-9668-1-git-send-email-roger.quadros@xxxxxxxxx/T/#u Roger Quadros (1): usb: gadget: f_mass_storage: Make CD-ROM emulation work with Mac OS-X drivers/usb/gadget/function/f_mass_storage.c | 73 +++++++++++++++++++++++----- 1 file changed, 61 insertions(+), 12 deletions(-) -- 2.7.4