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V4L/DVB: ivtv: Fix ivtv_api_get_data() to avoid unneeded IO during IRQ handling
authorAndy Walls <awalls@radix.net>
Wed, 10 Feb 2010 18:34:46 +0000 (15:34 -0300)
committerMauro Carvalho Chehab <mchehab@redhat.com>
Fri, 26 Feb 2010 18:11:07 +0000 (15:11 -0300)
commit587808d5f59e842f9258a15e88ad530fcf6e6763
tree07252eaff987faf5ad1b6256d520c13ab90e4554tree | snapshot
parent00cb9f6920aaeb34bcef146085ae57e363641a85commit | diff
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>
drivers/media/video/ivtv/ivtv-firmware.c diff | blob | history
drivers/media/video/ivtv/ivtv-irq.c diff | blob | history
drivers/media/video/ivtv/ivtv-mailbox.c diff | blob | history
drivers/media/video/ivtv/ivtv-mailbox.h diff | blob | history
Domain: SCM / Uncategorized;