Bug 55961
| Summary: | PATCH: Disable write buffering on Toshiba ToPIC95 | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | Ryan Underwood (nemesis) |
| Component: | PCMCIA | Assignee: | linux-pcmcia |
| Status: | RESOLVED CODE_FIX | ||
| Severity: | normal | CC: | levex, wsa |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 3.8.4 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: |
Disable write buffering on ToPIC95 if it is left enabled
add revision check |
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Tecra 500CDT last BIOS from 1999 is one example of a BIOS which enables this "feature". Created attachment 96881 [details]
add revision check
While I don't see any examples of a different-rev ToPIC95 in the wild, I figured it would be a good idea to constrain it to the revision which is known (by me) to have the issues, as well as revisions below that. Hi, Please send patches to linux-kernel@vger.kernel.org We can't do anything with them from bugzilla. I got around to posting a better version of the patch here: http://lists.infradead.org/pipermail/linux-pcmcia/2015-January/008449.html Commited as 2fb22a8042fe96b4220843f79241c116d90922c4 |
Created attachment 96651 [details] Disable write buffering on ToPIC95 if it is left enabled Attached is a patch that will disable write buffering on the Toshiba ToPIC95 if it is enabled by somebody (it is not supposed to be a power-on default according to the datasheet). On the ToPIC95, practically no 32-bit Cardbus card will work under heavy load without locking up the whole system if this is left enabled. I tried about a dozen. It does not affect 16-bit cards. This is similar to the O2 bugs in early controller revisions it seems.