On Thu, 09 Dec 2004 09:12:11 +0100
"Juan Aguilar Pérez"
Yo tenía un problema similar con un pen drive de 256 MB hasta que conseguí un parche para el módulo usb_storage:
===== drivers/usb/storage/scsiglue.c 1.74 vs edited ===== --- 1.74/drivers/usb/storage/scsiglue.c Sat Apr 24 22:25:50 2004 +++ edited/drivers/usb/storage/scsiglue.c Tue May 18 10:02:17 2004 @@ -48,12 +48,15 @@ #include "usb.h" #include "debug.h" #include "transport.h" +#include "protocol.h"
#include
#include #include #include +#define SKIP_MODE_SENSE_PAGE_3F 1 +
/*********************************************************************** * Host functions @@ -68,10 +71,13 @@ { /* * Set default bflags. These can be overridden for individual - * models and vendors via the scsi devinfo mechanism. + * models and vendors via the scsi devinfo mechanism. The only + * flag we need is to force 36-byte INQUIRYs; we don't use any + * of the extra data and many devices choke if asked for more or + * less than 36 bytes. */ - sdev->sdev_bflags = (BLIST_MS_SKIP_PAGE_08 | BLIST_MS_SKIP_PAGE_3F | - BLIST_USE_10_BYTE_MS); + sdev->sdev_bflags = BLIST_INQUIRY_36; + return 0; }
@@ -95,11 +101,46 @@ * reduce the maximum transfer size to 64 KB = 128 sectors. */
#define USB_VENDOR_ID_GENESYS 0x05e3 // Needs a standard location + if (us->pusb_dev->descriptor.idVendor == USB_VENDOR_ID_GENESYS && - us->pusb_dev->speed == USB_SPEED_HIGH) + us->pusb_dev->speed == USB_SPEED_HIGH && + sdev->request_queue->max_sectors > 128) blk_queue_max_sectors(sdev->request_queue, 128);
- /* this is to satisify the compiler, tho I don't think the + /* We can't put these settings in slave_alloc() because that gets + * called before the device type is known. Consequently these + * settings can't be overridden via the scsi devinfo mechanism. */ + if (sdev->type == TYPE_DISK) { + + /* Disk-type devices use MODE SENSE(6) if the protocol + * (SubClass) is Transparent SCSI, otherwise they use + * MODE SENSE(10). */ + if (us->subclass != US_SC_SCSI) + sdev->use_10_for_ms = 1; + + /* Many disks only accept MODE SENSE transfer lengths of + * 192 bytes (that's what Windows uses). */ + sdev->use_192_bytes_for_3f = 1; + + /* A number of devices have problems with MODE SENSE for + * page x08, so we will skip it. */ + sdev->skip_ms_page_8 = 1; + + /* Some devices may not like MODE SENSE with page=0x3f. + * Now that we're using 192-byte transfers this may no + * longer be a problem. So this will be a compile-time + * option. */ + sdev->skip_ms_page_3f = SKIP_MODE_SENSE_PAGE_3F; + + } else { + + /* Non-disk-type devices don't need to blacklist any pages + * or to force 192-byte transfer lengths for MODE SENSE. + * But they do need to use MODE SENSE(10). */ + sdev->use_10_for_ms = 1; + } + + /* this is to satisfy the compiler, tho I don't think the * return code is ever checked anywhere. */ return 0; }
Así que parcheé el código fuente del módulo recoompilé los módulos, los instalé y dejó de dar problemas.
Perdona mi torpeza. En /lib/modules/2.6.5-7.111.5-default/kernel/drivers/usb/storage sólo tengo el siguiente módulo: usb-storage.ko En el código que me envías aparece 1.74/drivers/usb/storage/scsiglue.c ¿Esto dónde está?¿Tengo que bajarme los fuentes del kernel? Cuando dices parchear ¿te refieres a sustituir el código de scsiglue.c por el que me envías? Una vez sustituido, ¿se recompila con make o hay que hacer algo más? Y, por último, imagino que instalar los módulos es colocar el/los módulos compilados en .../drivers/usb/storage, no? Saludos.