diff options
| author | Fabrizio Castro <fabrizio.castro@bp.renesas.com> | 2018-09-10 13:43:13 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-13 11:20:25 +0300 |
| commit | 9f4928c2ba0ade4aef360799f43e46045761df46 (patch) | |
| tree | 215bed3c4adc4a2b240257750783d0769dd4ba90 /drivers | |
| parent | 06144feb51042b239e88b4386b4fef33bbf79304 (diff) | |
| download | linux-9f4928c2ba0ade4aef360799f43e46045761df46.tar.xz | |
can: rcar_can: Fix erroneous registration
[ Upstream commit 68c8d209cd4337da4fa04c672f0b62bb735969bc ]
Assigning 2 to "renesas,can-clock-select" tricks the driver into
registering the CAN interface, even though we don't want that.
This patch improves one of the checks to prevent that from happening.
Fixes: 862e2b6af9413b43 ("can: rcar_can: support all input clocks")
Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Signed-off-by: Chris Paterson <Chris.Paterson2@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/can/rcar/rcar_can.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/can/rcar/rcar_can.c b/drivers/net/can/rcar/rcar_can.c index 788459f6bf5c..9b2c3bd00f8b 100644 --- a/drivers/net/can/rcar/rcar_can.c +++ b/drivers/net/can/rcar/rcar_can.c @@ -24,6 +24,9 @@ #define RCAR_CAN_DRV_NAME "rcar_can" +#define RCAR_SUPPORTED_CLOCKS (BIT(CLKR_CLKP1) | BIT(CLKR_CLKP2) | \ + BIT(CLKR_CLKEXT)) + /* Mailbox configuration: * mailbox 60 - 63 - Rx FIFO mailboxes * mailbox 56 - 59 - Tx FIFO mailboxes @@ -789,7 +792,7 @@ static int rcar_can_probe(struct platform_device *pdev) goto fail_clk; } - if (clock_select >= ARRAY_SIZE(clock_names)) { + if (!(BIT(clock_select) & RCAR_SUPPORTED_CLOCKS)) { err = -EINVAL; dev_err(&pdev->dev, "invalid CAN clock selected\n"); goto fail_clk; |