Thanks for the help.
Anyway, I came up with a sort of solution of my own. Perhaps someboby may find
it useful, so here it goes:
Near the end of /location/of/kernel/sources/linux-2.2.20/drivers/scsi/sd.c
I've found
if ( the_result ) {
printk ("%s: test WP failed, assume Write Protected\n",nbuff);
rscsi_disks[i].write_prot = 1;
} else {
rscsi_disks[i].write_prot = ((buffer[2] & 0x80) != 0);
printk ("%s: Write Protect is %s\n",nbuff,
rscsi_disks[i].write_prot ? "on" : "off");
}
which I've modified to
if ( the_result ) {
printk ("%s: test WP failed, assume Write Enabled\n",nbuff);
rscsi_disks[i].write_prot = 0;
} else {
rscsi_disks[i].write_prot = ((buffer[2] & 0x80) != 0);
printk ("%s: Write Protect is %s\n",nbuff,
rscsi_disks[i].write_prot ? "on" : "off");
}
Then I recompiled the kernel. Now I can write on the camera's memory stick.
I'm aware of potential unexpected behaviors from the kernel. Even worse,
I have no idea of programming (not at this level, anyway). But this quick
and dirty hacking seems to work just fine.
>===== Original Message From [EMAIL PROTECTED] =====
>If you read the FAQ you'll discover that USB Storage isn't supported in
>the 2.2 kernel.
>
>On Sat, 9 Nov 2002, Julio H. Toloza wrote:
>
>> Hi,
>>
>> I have linux box with kernel 2.2.20, which I've compiled with USB support
>> and the (experimental) usb-storage module. In order to get my Sony DSC P51
>> properly detected, I followed several hints I found in this mail list
concerning
>> the use of this camera with kernel 2.4.17. So I've modified usb-storage.c
by
>> adding the following lines
>>
>> { 0x054c, 0x0010, 0x0410,
>> "Sony DSC-P51", US_SC_SCSI, US_PR_CB,
>> US_FL_SINGLE_LUN | US_FL_START_STOP | US_FL_MODE_XLATE |
US_FL_ALT_LENGTH},
>>
>> to the list of devices recognized. After recompiling the kernel, I'vet got
my
>> camera well detected. So I can read the files from the camera. But alas! I
can't
>> delete them. From /var/log/messages I get
>>
>> Nov 9 13:52:50 cucaracha kernel: hub.c: USB new device connect on bus2/2,
assigned device number 2
>> Nov 9 13:52:50 cucaracha kernel: usb.c: USB new device connect, assigned
device number 2
>> Nov 9 13:52:50 cucaracha kernel: scsi1 : SCSI emulation for USB Mass
Storage devices
>> Nov 9 13:52:50 cucaracha kernel: scsi : 2 hosts.
>> Nov 9 13:52:50 cucaracha kernel: Vendor: Sony Model: Sony DSC
Rev: 4.10
>> Nov 9 13:52:50 cucaracha kernel: Type: Direct-Access
ANSI SCSI revision: 02
>> Nov 9 13:52:50 cucaracha kernel: Detected scsi removable disk sda at
scsi1, channel 0, id 0, lun 0
>> Nov 9 13:52:50 cucaracha kernel: SCSI device sda: hdwr sector= 512 bytes.
Sectors= 31680 [15 MB] [0.0 GB]
>> Nov 9 13:52:50 cucaracha kernel: usb-uhci.c: interrupt, status 3, frame#
1426
>> Nov 9 13:52:50 cucaracha kernel: sda: test WP failed, assume Write
Protected
>> Nov 9 13:52:50 cucaracha kernel: sda: sda1
>> Nov 9 13:53:28 cucaracha kernel: usb.c: USB disconnect on device 2
>>
>> So the camera is assumed to the be Write Protected. Same messages appear
with
>> kernel 2.4.17, but the camera is assumed to be Write Enable (and then
everybody
>> is happy). So the question is: Does anydoby know how to make the kernel
>> (2.2.20) assume that the device is Write Enabled?
>>
>> Thanks a lot.
>>
>> Julio Hugo Toloza
>> Physics Department
>> Virginia Polytechnic Institute and State University
>> Blacksburg, VA 24061-0435, USA
>> E-mail: [EMAIL PROTECTED]
>>
>>
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>
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