I'll look at this when I get a chance. Thanks for the bug report.
Regards,
/\/elson
On Wed, 21 Nov 2001, Frank Zago wrote:
>
> Hi,
>
> I'm using linux 2.4.14 with a UMAX 2200 USB scanner. When I do a "modprobe
> scanner" and "rmmod scanner", the rmmod process get stuck forever.
> The problem comes from disconnect_scanner(). It does a
> down (&(scn->sem));
> then calls usb_unlink_urb().
> For some reason an interrupt is generated during that moment, so
> irq_scanner() is called. irq_scanner() also does a
> down (&(scn->sem));
>
> ==> problem.
>
> I think the down (&(scn->sem)); / up (&(scn->sem)); in
> disconnect_scanner() is unnecessary because the module cannot be removed
> if a process is using it, so that function will not be called. Removing
> them solves my problem.
>
>
>
> Also in probe_scanner(), there is a couple up(&scn_mutex); missing before
> the next 2 return NULL;
>
>
>
> T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
> B: Alloc= 11/900 us ( 1%), #Int= 1, #Iso= 0
> D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
> P: Vendor=0000 ProdID=0000 Rev= 0.00
> S: Product=USB UHCI Root Hub
> S: SerialNumber=ef80
> C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA
> I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
> E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255ms
> T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
> D: Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
> P: Vendor=1606 ProdID=0230 Rev= 1.00
> C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=100mA
> I: If#= 0 Alt= 0 #EPs= 3 Cls=00(>ifc ) Sub=00 Prot=00 Driver=usbscanner
> E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
> E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
> E: Ad=83(I) Atr=03(Int.) MxPS= 1 Ivl= 1ms
>
>
> 00:1f.2 USB Controller: Intel Corporation 82801AA USB (rev 02) (prog-if 00
> [UHCI])
> Subsystem: Intel Corporation 82801AA USB
> Flags: bus master, medium devsel, latency 0, IRQ 9
> I/O ports at ef80 [size=32]
>
>
> Frank.
>
>
--
~~ ** ~~ UNIX remains, to this very day, a dark endless maze of ~~ ** ~~
catwalks and mantraps, an eternal hard-hat area that
kills the foolish and shelters the brave. (UNIX Manifesto)
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