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SubjectRe: [usb-storage] BUG: SCSI: usb storage SDHC card doesn't work in 2.6.27-rc1
Alan Stern wrote:
> > The patches to fix this that I have tried do not apply
> > cleanly to lk 2.6.26 (and break during compile if forced:
> > "us->fflags" is not defined).
> >
> > Is there a lk 2.6.26 patch available?
>
> Sorry about that; my patches are against the USB development tree and
> I tend to forget to redo them against the vanilla kernel. Below is a
> patch against 2.6.26. Or you can just edit the original patch and
> change the occurrences of "fflags" to "flags".
>
> Alan Stern
>
>
> Index: 2.6.26/drivers/usb/storage/transport.c
> ===================================================================
> --- 2.6.26.orig/drivers/usb/storage/transport.c
> +++ 2.6.26/drivers/usb/storage/transport.c
> @@ -1034,8 +1034,21 @@ int usb_stor_Bulk_transport(struct scsi_
>
> /* try to compute the actual residue, based on how much data
> * was really transferred and what the device tells us */
> - if (residue) {
> - if (!(us->flags & US_FL_IGNORE_RESIDUE)) {
> + if (residue && !(us->flags & US_FL_IGNORE_RESIDUE)) {
> +
> + /* Heuristically detect devices that generate bogus residues
> + * by seeing what happens with INQUIRY and READ CAPACITY
> + * commands.
> + */
> + if (bcs->Status == US_BULK_STAT_OK &&
> + scsi_get_resid(srb) == 0 &&
> + ((srb->cmnd[0] == INQUIRY &&
> + transfer_length == 36) ||
> + (srb->cmnd[0] == READ_CAPACITY &&
> + transfer_length == 8))) {
> + us->flags |= US_FL_IGNORE_RESIDUE;
> +
> + } else {
> residue = min(residue, transfer_length);
> scsi_set_resid(srb, max(scsi_get_resid(srb),
> (int) residue));
>
>

Thanks! I've been trying to fix it manually, and it wouldn't work. Trying
this version now. Let's see if this fixes my problem.

Matt Frost


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