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| author | Daniel Ritz <daniel.ritz@gmx.ch> | 2005-09-20 14:17:37 -0700 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2006-01-05 23:41:00 +0100 |
| commit | e4115805cf2020da94e8bd1296243605cda487ff (patch) | |
| tree | 0362f93813f4a90e0c241c5e49e04207feb985ee | |
| parent | 37f779554404ddca981ac4b4cc6692fc09b71e96 (diff) | |
| download | kernel_samsung_smdk4412-e4115805cf2020da94e8bd1296243605cda487ff.tar.gz kernel_samsung_smdk4412-e4115805cf2020da94e8bd1296243605cda487ff.tar.bz2 kernel_samsung_smdk4412-e4115805cf2020da94e8bd1296243605cda487ff.zip | |
[PATCH] yenta: optimize interrupt handler
Don't waste cpu time in yenta interrupt handler when the interrupt was for
another device.
Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
| -rw-r--r-- | drivers/pcmcia/yenta_socket.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c index ec6ab65f087..8bfe72b7130 100644 --- a/drivers/pcmcia/yenta_socket.c +++ b/drivers/pcmcia/yenta_socket.c @@ -531,6 +531,9 @@ static irqreturn_t yenta_interrupt(int irq, void *dev_id, struct pt_regs *regs) csc = exca_readb(socket, I365_CSC); + if (!(cb_event || csc)) + return IRQ_NONE; + events = (cb_event & (CB_CD1EVENT | CB_CD2EVENT)) ? SS_DETECT : 0 ; events |= (csc & I365_CSC_DETECT) ? SS_DETECT : 0; if (exca_readb(socket, I365_INTCTL) & I365_PC_IOCARD) { @@ -544,10 +547,7 @@ static irqreturn_t yenta_interrupt(int irq, void *dev_id, struct pt_regs *regs) if (events) pcmcia_parse_events(&socket->socket, events); - if (cb_event || csc) - return IRQ_HANDLED; - - return IRQ_NONE; + return IRQ_HANDLED; } static void yenta_interrupt_wrapper(unsigned long data) |