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Lubomir Rintel 2165ef0348 usb-storage: Add max sectors quirk for Nokia 208 
commit cdef30e077 upstream.

This fixes data corruption when accessing the internal SD card in mass
storage mode.

I am actually not too sure why. I didn't figure a straightforward way to
reproduce the issue, but i seem to get garbage when issuing a lot (over 50)
of large reads (over 120 sectors) are done in a quick succession. That is,
time seems to matter here -- larger reads are fine if they are done with
some delay between them.

But I'm not great at understanding this sort of things, so I'll assume
the issue other, smarter, folks were seeing with similar phones is the
same problem and I'll just put my quirk next to theirs.

The "Software details" screen on the phone is as follows:

  V 04.06
  07-08-13
  RM-849
  (c) Nokia

TL;DR version of the device descriptor:

  idVendor           0x0421 Nokia Mobile Phones
  idProduct          0x06c2
  bcdDevice            4.06
  iManufacturer           1 Nokia
  iProduct                2 Nokia 208

The patch assumes older firmwares are broken too (I'm unable to test, but
no biggie if they aren't I guess), and I have no idea if newer firmware
exists.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Cc: stable <stable@kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20250101212206.2386207-1-lkundrak@v3.sk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-01-23 17:15:53 +01:00
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README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.