0) Five USB memory sticks I happen to have will generate sets of two
errors when inserted. These sets are either:
[...] Asking for cache data failed
[...] Assuming drive cache: write through
or:
[...] No Caching mode page present
[...] Assuming drive cache: write through
These errors are generated by the SCSI stack (and printed thrice).
1) These patches try to hide those errors by:
- downgrading one error to a notice; and
- setting the NO_WP_DETECT quirk for these five devices.
2) Review of these patches is appreciated. Please note that the first
patch downgrades the error also for code paths that I apparently never
trigger, so that one especially needs additional thought, testing, etc.
3) It's not entirely clear which names one should use in the
UNUSUAL_DEV() macro. I just picked the most neutral names that showed up
for the devices in the logs.
4) Tested on v3.3.4, but applies cleanly to v3.4-rc6.
Paul Bolle (3):
scsi: downgrade "write through" error to notice
usb-storage: use NO_WP_DETECT for two devices
usb-storage: use NO_WP_DETECT for three devices
drivers/scsi/sd.c | 2 +-
drivers/usb/storage/unusual_devs.h | 22 ++++++++++++++++++++--
2 files changed, 21 insertions(+), 3 deletions(-)
--
1.7.7.6
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