2016-03-25 22:15 GMT+09:00 walter harms <wharms@xxxxxx>: > > > Am 25.03.2016 12:33, schrieb Daeseok Youn: >> the dgnc_offset_table has a same value with (1 << port). >> So I tried to replace dgnc_offset_table array with 1 << port. >> And also there are redundant assignments(tmp and current_port) >> inside while loop for checking uart port, and remove them. >> >> Signed-off-by: Daeseok Youn <daeseok.youn@xxxxxxxxx> >> --- >> Greg, This patch depends on previous patches. >> here are links(previous): >> 1. https://lkml.org/lkml/2016/3/24/661 >> 2. https://lkml.org/lkml/2016/3/24/663 >> >> if those patches are failed to merge, I will send them again after >> fixing them. >> >> thanks. >> >> drivers/staging/dgnc/dgnc_neo.c | 44 +++++++++++++++++++---------------------- >> 1 file changed, 20 insertions(+), 24 deletions(-) >> >> diff --git a/drivers/staging/dgnc/dgnc_neo.c b/drivers/staging/dgnc/dgnc_neo.c >> index d732e6e..8b6bc73 100644 >> --- a/drivers/staging/dgnc/dgnc_neo.c >> +++ b/drivers/staging/dgnc/dgnc_neo.c >> @@ -77,9 +77,6 @@ struct board_ops dgnc_neo_ops = { >> .send_immediate_char = neo_send_immediate_char >> }; >> >> -static uint dgnc_offset_table[8] = { 0x01, 0x02, 0x04, 0x08, >> - 0x10, 0x20, 0x40, 0x80 }; >> - >> /* >> * This function allows calls to ensure that all outstanding >> * PCI writes have been completed, by doing a PCI read against >> @@ -923,9 +920,7 @@ static irqreturn_t neo_intr(int irq, void *voidbrd) >> struct dgnc_board *brd = voidbrd; >> struct channel_t *ch; >> int port = 0; >> - int type = 0; >> - int current_port; >> - u32 tmp; >> + int type; >> u32 uart_poll; >> unsigned long flags; >> unsigned long flags2; >> @@ -960,28 +955,29 @@ static irqreturn_t neo_intr(int irq, void *voidbrd) >> >> /* At this point, we have at least SOMETHING to service, dig further... */ >> >> - current_port = 0; >> - >> /* Loop on each port */ >> while ((uart_poll & 0xff) != 0) { >> - tmp = uart_poll; >> - >> - /* Check current port to see if it has interrupt pending */ >> - if ((tmp & dgnc_offset_table[current_port]) != 0) { >> - port = current_port; >> - type = tmp >> (8 + (port * 3)); >> - type &= 0x7; >> - } else { >> - current_port++; >> - continue; >> - } >> + int i; >> >> - /* Remove this port + type from uart_poll */ >> - uart_poll &= ~(dgnc_offset_table[port]); >> + type = 0; >> >> - if (!type) { >> - /* If no type, just ignore it, and move onto next port */ >> - continue; >> + for (i = port; i < MAXPORTS; i++) { >> + unsigned int offset_table = 0x1 << i; >> + >> + /* Check current port to see >> + * if it has interrupt pending >> + */ >> + if ((uart_poll & offset_table) != 0) { >> + port = i; >> + type = uart_poll >> (8 + (port * 3)); >> + type &= 0x7; >> + >> + /* Remove this port + type from uart_poll */ >> + uart_poll &= ~(offset_table); > > why not: art_poll &= ~ (0x1 << i); > then you can easy eliminate offset_table > > btw: why do you need i ? > > re, > wh Hi, walter. I'm sorry for reply lately. :-) Ok. I will try clean up useless variables and send this again. Thanks. regards, Daeseok. > >> + } >> + >> + if (type) >> + break; >> } >> >> /* Switch on type of interrupt we have */ _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
