From d694b06c42a56c9610861ee0474b4d441af8ada6 Mon Sep 17 00:00:00 2001 From: Ed Spiridonov Date: Fri, 4 Mar 2016 09:07:27 +0300 Subject: can: mcp251x: avoid write to error flag register if it's unnecessary Only two bits (RX0OVR and RX1OVR) are writable in EFLG, write is useless if these bits aren't set. Signed-off-by: Ed Spiridonov Signed-off-by: Marc Kleine-Budde --- drivers/net/can/spi/mcp251x.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/net/can') diff --git a/drivers/net/can/spi/mcp251x.c b/drivers/net/can/spi/mcp251x.c index 575790e8a75a..74a7dfecee27 100644 --- a/drivers/net/can/spi/mcp251x.c +++ b/drivers/net/can/spi/mcp251x.c @@ -843,7 +843,7 @@ static irqreturn_t mcp251x_can_ist(int irq, void *dev_id) if (clear_intf) mcp251x_write_bits(spi, CANINTF, clear_intf, 0x00); - if (eflag) + if (eflag & (EFLG_RX0OVR | EFLG_RX1OVR)) mcp251x_write_bits(spi, EFLG, eflag, 0x00); /* Update can state */ -- cgit v1.2.3-59-g8ed1b