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| author | Andy Walls <awalls@radix.net> | 2010-02-10 21:34:46 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-02-26 21:11:07 +0300 |
| commit | 587808d5f59e842f9258a15e88ad530fcf6e6763 (patch) | |
| tree | 07252eaff987faf5ad1b6256d520c13ab90e4554 /Documentation/video4linux | |
| parent | 00cb9f6920aaeb34bcef146085ae57e363641a85 (diff) | |
| download | linux-587808d5f59e842f9258a15e88ad530fcf6e6763.tar.xz | |
V4L/DVB: ivtv: Fix ivtv_api_get_data() to avoid unneeded IO during IRQ handling
ivtv_api_get_data() was performing more PCI MMIO than needed, resulting
often in it accounting for more than half the total time spent in
ivtv_irq_handler(). Now it only reads at most 7 of the 16 mailbox data words
over the PCI bus, and in some instances only 2 or 3 data words as needed.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation/video4linux')
0 files changed, 0 insertions, 0 deletions