960534a20e
I always thought the support for multiple logical SCSI units in the USB mass storage class was a dead feature. Turns out that it's actually used by SD card readers that provide multiple slots (e.g. one regular sized and one micro-SD). Implementing perfect support for that would require a major redesign of the whole MSC stack, since the one device -> one disk assumption is deeply embedded in our data structures. Instead, this patch implements a poor man's LUN support that will just cycle through all available LUNs (in multiple calls to usb_msc_poll()) until it finds a connected device. This should be reasonable enough to allow these card readers to be usable while only requiring superficial changes. Also removes the unused 'protocol' attribute of usb_msc_inst_t. BRANCH=rambi?,nyan BUG=chrome-os-partner:28437 TEST=Alternatively plug an SD or micro-SD card (or both) into my card reader, confirm that one of them is correctly detected at all times. Change-Id: I3df4ca88afe2dcf7928b823aa2a73c2b0f599cf2 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/198101 Reviewed-by: Aaron Durbin <adurbin@chromium.org> |
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| .. | ||
| usb.h | ||
| usbdisk.h | ||
| usbmsc.h | ||