diff options
| author | David Brownell <david-b@pacbell.net> | 2008-05-23 13:05:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-05-24 09:56:14 -0700 |
| commit | 25d5cb4b0375e5864ec0ccf35e12ff1d1b5cf3f0 (patch) | |
| tree | 0d83e4176f9a8178a98631097fbf839a53702d94 /lib/cpumask.c | |
| parent | 5c02b575780d0d785815a1e7b79a98edddee895a (diff) | |
spi: remove some spidev oops-on-rmmod paths
Somehow the spidev code forgot to include a critical mechanism: when the
underlying device is removed (e.g. spi_master rmmod), open file
descriptors must be prevented from issuing new I/O requests to that
device. On penalty of the oopsing reported by Sebastian Siewior
<bigeasy@tglx.de> ...
This is a partial fix, adding handshaking between the lower level (SPI
messaging) and the file operations using the spi_dev. (It also fixes an
issue where reads and writes didn't return the number of bytes sent or
received.)
There's still a refcounting issue to be addressed (separately).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Reported-by: Sebastian Siewior <bigeasy@tglx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/cpumask.c')
0 files changed, 0 insertions, 0 deletions