On Thu, 20 Apr 2017, Andreas Hartmann wrote:
> >> Apr 19 19:25:39 notebook2 kernel: scsi host6: scsi scan: INQUIRY result too short (5), using 36
> >
> > But that is wrong! Even though it's for a working test. It means the
> > usb_stor_set_xfer_buf() subroutine isn't doing what it should.
> >
> > Please apply the following debugging patch (on top of the previous one)
> > and let's see what it prints in the kernel log.
>
>
> These are the log entries. I'm not sure if they contain what you expected:
No, they don't. But they do indicate where the problem lies.
> ok 1
>
> Apr 20 22:24:53 notebook2 kernel: usb 1-1.1: new high-speed USB device number 3 using ehci-pci
> Apr 20 22:24:53 notebook2 kernel: usb 1-1.1: New USB device found, idVendor=0cf2, idProduct=6250
> Apr 20 22:24:53 notebook2 kernel: usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=4
> Apr 20 22:24:53 notebook2 kernel: usb 1-1.1: Product: UB6250
> Apr 20 22:24:53 notebook2 kernel: usb 1-1.1: Manufacturer: ENE Flash
> Apr 20 22:24:53 notebook2 kernel: usb 1-1.1: SerialNumber: 606569746801
> Apr 20 22:24:53 notebook2 mtp-probe[2246]: checking bus 1, device 3: "/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1"
> Apr 20 22:24:53 notebook2 mtp-probe[2246]: bus: 1, device: 3 was not an MTP device
> Apr 20 22:24:54 notebook2 kernel: usbcore: registered new interface driver usb-storage
> Apr 20 22:24:54 notebook2 kernel: usbcore: registered new interface driver uas
> Apr 20 22:24:54 notebook2 kernel: ums_eneub6250 1-1.1:1.0: USB Mass Storage device detected
> Apr 20 22:24:54 notebook2 kernel: scsi host6: usb-storage 1-1.1:1.0
> Apr 20 22:24:54 notebook2 kernel: usbcore: registered new interface driver ums_eneub6250
> Apr 20 22:24:55 notebook2 kernel: usb 1-1.1: direct-loading ene-ub6250/sd_init1.bin
> Apr 20 22:24:56 notebook2 kernel: usb 1-1.1: direct-loading ene-ub6250/sd_init2.bin
> Apr 20 22:24:56 notebook2 kernel: scsi 6:0:0:0: Direct-Access PQ: 0 ANSI: 0
We should have seen a pair of "set_xfer_buf" lines before this.
> ok 2
>
> Apr 20 22:25:51 notebook2 kernel: usb 1-1.1: new high-speed USB device number 4 using ehci-pci
> Apr 20 22:25:51 notebook2 kernel: usb 1-1.1: New USB device found, idVendor=0cf2, idProduct=6250
> Apr 20 22:25:51 notebook2 kernel: usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=4
> Apr 20 22:25:51 notebook2 kernel: usb 1-1.1: Product: UB6250
> Apr 20 22:25:51 notebook2 kernel: usb 1-1.1: Manufacturer: ENE Flash
> Apr 20 22:25:51 notebook2 kernel: usb 1-1.1: SerialNumber: 606569746801
> Apr 20 22:25:51 notebook2 kernel: ums_eneub6250 1-1.1:1.0: USB Mass Storage device detected
> Apr 20 22:25:51 notebook2 kernel: scsi host6: usb-storage 1-1.1:1.0
> Apr 20 22:25:51 notebook2 mtp-probe[2293]: checking bus 1, device 4: "/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.1"
> Apr 20 22:25:51 notebook2 mtp-probe[2293]: bus: 1, device: 4 was not an MTP device
> Apr 20 22:25:52 notebook2 kernel: usb 1-1.1: direct-loading ene-ub6250/sd_init1.bin
> Apr 20 22:25:53 notebook2 kernel: usb 1-1.1: direct-loading ene-ub6250/sd_init2.bin
> Apr 20 22:25:53 notebook2 kernel: scsi host6: scsi scan: INQUIRY result too short (5), using 36
> Apr 20 22:25:53 notebook2 kernel: scsi 6:0:0:0: Direct-Access PQ: 0 ANSI: 0
Same here. So the reason usb_stor_set_xfer_buf() wasn't working is
because it never got called!
Knowing that, it's easy to see where the bug is. It's a completely
different issue from the bad DMA problem. In fact, I'm surprised that
this driver ever worked at all.
Please try the patch below. (You can remove the usb_stor_set_xfer_buf
patch.)
Alan Stern
Index: usb-4.x/drivers/usb/storage/ene_ub6250.c
===================================================================
--- usb-4.x.orig/drivers/usb/storage/ene_ub6250.c
+++ usb-4.x/drivers/usb/storage/ene_ub6250.c
@@ -2295,21 +2295,22 @@ static int ms_scsi_irp(struct us_data *u
static int ene_transport(struct scsi_cmnd *srb, struct us_data *us)
{
- int result = 0;
+ int result = USB_STOR_XFER_GOOD;
struct ene_ub6250_info *info = (struct ene_ub6250_info *)(us->extra);
/*US_DEBUG(usb_stor_show_command(us, srb)); */
scsi_set_resid(srb, 0);
- if (unlikely(!(info->SD_Status.Ready || info->MS_Status.Ready))) {
+ if (unlikely(!(info->SD_Status.Ready || info->MS_Status.Ready)))
result = ene_init(us);
- } else {
+ if (result == USB_STOR_XFER_GOOD) {
+ result = USB_STOR_TRANSPORT_ERROR;
if (info->SD_Status.Ready)
result = sd_scsi_irp(us, srb);
if (info->MS_Status.Ready)
result = ms_scsi_irp(us, srb);
}
- return 0;
+ return result;
}
static struct scsi_host_template ene_ub6250_host_template;
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