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can: mcp251x: optimize 2515, rx int gets cleared automatically

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Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
This commit is contained in:
Marc Kleine-Budde 2010-10-04 12:09:31 +02:00
parent beab675cb4
commit 9c473fc339
1 changed files with 9 additions and 4 deletions
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13
drivers/net/can/mcp251x.c
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@ -793,15 +793,20 @@ static irqreturn_t mcp251x_can_ist(int irq, void *dev_id)
/* receive buffer 0 */
if (intf & CANINTF_RX0IF) {
mcp251x_hw_rx(spi, 0);
/* Free one buffer ASAP */
mcp251x_write_bits(spi, CANINTF, intf & CANINTF_RX0IF,
0x00);
/*
* Free one buffer ASAP
* (The MCP2515 does this automatically.)
*/
if (mcp251x_is_2510(spi))
mcp251x_write_bits(spi, CANINTF, CANINTF_RX0IF, 0x00);
}
/* receive buffer 1 */
if (intf & CANINTF_RX1IF) {
mcp251x_hw_rx(spi, 1);
clear_intf |= CANINTF_RX1IF;
/* the MCP2515 does this automatically */
if (mcp251x_is_2510(spi))
clear_intf |= CANINTF_RX1IF;
}
/* any error or tx interrupt we need to clear? */