Hi,
On Tue, May 19, 2009 at 09:30:59PM +0200, Bartlomiej Zolnierkiewicz wrote:
> Incremental patch fixing it:
>
> diff -u b/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
> --- b/drivers/ide/ide-iops.c
> +++ b/drivers/ide/ide-iops.c
> @@ -255,7 +255,7 @@
> if (ivb) {
> const char *model = (char *)&id[ATA_ID_PROD];
>
> - if (strcmp("TSSTcorp CDDVDW SH-S202", model) == 0) {
> + if (strstr("TSSTcorp CDDVDW SH-S202", model)) {
> /*
> * These ATAPI devices always report 80c cable
> * so we have to depend on the host in this case.
>
I applied that, recompiled, installed, rebooted, and checked the syslog.
The message was still
hdc: UDMA/66 mode selected
and hdparm also showed "udma4" as being selected. I therefore didn't test
with a DVD.
However, after twice reading the POSIX definition of strstr() I reversed
the order of the arguments to
if (strstr(model, "TSSTcorp CDDVDW SH-S202")) {
and that did it. Syslog now contained:
hdc: host side 80-wire cable detection failed, limiting max speed to UDMA33
hdc: UDMA/33 mode selected
hdparm showed "udma2", and playing movie DVDs worked without DMA being
disabled. :-)
That seems to be it, then. Many thanks for your help, and in particular for
the explanations.
Regards,
Martin Lottermoser
--
Martin Lottermoser Martin.Lottermoser at _REMOVE_t-online.de
Greifswaldstrasse 28
38124 Braunschweig http://home.vrweb.de/martin.lottermoser
Germany
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