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author | Helmut Schaa <helmut.schaa@googlemail.com> | 2011-08-06 13:13:48 +0200 |
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committer | John W. Linville <linville@tuxdriver.com> | 2011-08-09 15:52:08 -0400 |
commit | abc11994112bf7441519e35f51c29ff5de5b0d4d (patch) | |
tree | 88b11da5cdec1a7a10ff7a388d29b94902c69653 /net/nfc | |
parent | c3ccb3341ec05444c8374d1829edc5157fc94853 (diff) |
rt2x00: Fix PCI interrupt processing race on SMP systems
When toggle_irq is called for PCI devices to disable device interrupts
it used tasklet_disable to wait for a possibly running tasklet to finish.
However, on SMP systems the tasklet might still be scheduled on another CPU.
Instead, use tasklet_kill to ensure that all scheduled tasklets are finished
before returning from toggle_irq.
Furthermore, it was possible that a tasklet reenabled its interrupt even
though interrupts have been disabled already. Fix this by checking the
DEVICE_STATE_ENABLED_RADIO flag before reenabling single interrupts
during tasklet processing.
While at it also enable/kill the TBTT and PRETBTT tasklets in the
toggle_irq callback and only use tasklet_kill in stop_queue to wait
for a currently scheduled beacon update before returning.
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/nfc')
0 files changed, 0 insertions, 0 deletions