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net: lpc_eth: fix warnings caused by enabling unprepared clock 

If common clock framework is configured, the driver generates warnings,
which are fixed by this change:

    WARNING: CPU: 0 PID: 1 at linux/drivers/clk/clk.c:727 clk_core_enable+0x2c/0xa4()
    Modules linked in:
    CPU: 0 PID: 1 Comm: swapper Not tainted 4.3.0-rc2+ #141
    Hardware name: LPC32XX SoC (Flattened Device Tree)
    Backtrace:
    [<>] (dump_backtrace) from [<>] (show_stack+0x18/0x1c)
    [<>] (show_stack) from [<>] (dump_stack+0x20/0x28)
    [<>] (dump_stack) from [<>] (warn_slowpath_common+0x90/0xb8)
    [<>] (warn_slowpath_common) from [<>] (warn_slowpath_null+0x24/0x2c)
    [<>] (warn_slowpath_null) from [<>] (clk_core_enable+0x2c/0xa4)
    [<>] (clk_core_enable) from [<>] (clk_enable+0x24/0x38)
    [<>] (clk_enable) from [<>] (lpc_eth_drv_probe+0xfc/0x99c)
    [<>] (lpc_eth_drv_probe) from [<>] (platform_drv_probe+0x50/0xa0)
    [<>] (platform_drv_probe) from [<>] (driver_probe_device+0x18c/0x408)
    [<>] (driver_probe_device) from [<>] (__driver_attach+0x70/0x94)
    [<>] (__driver_attach) from [<>] (bus_for_each_dev+0x74/0x98)
    [<>] (bus_for_each_dev) from [<>] (driver_attach+0x20/0x28)
    [<>] (driver_attach) from [<>] (bus_add_driver+0x11c/0x248)
    [<>] (bus_add_driver) from [<>] (driver_register+0xa4/0xe8)
    [<>] (driver_register) from [<>] (__platform_driver_register+0x50/0x64)
    [<>] (__platform_driver_register) from [<>] (lpc_eth_driver_init+0x18/0x20)
    [<>] (lpc_eth_driver_init) from [<>] (do_one_initcall+0x11c/0x1dc)
    [<>] (do_one_initcall) from [<>] (kernel_init_freeable+0x10c/0x1d4)
    [<>] (kernel_init_freeable) from [<>] (kernel_init+0x10/0xec)
    [<>] (kernel_init) from [<>] (ret_from_fork+0x14/0x24)

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Zapolskiy 2015-10-01 00:37:43 +03:00 committed by David S. Miller
parent f6194bcf03
commit 33a8316d9c
1 changed files with 6 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/net/ethernet/nxp/lpc_eth.c
View File

@ -476,13 +476,12 @@ static void __lpc_get_mac(struct netdata_local *pldat, u8 *mac)
mac[5] = tmp >> 8;
}
static void __lpc_eth_clock_enable(struct netdata_local *pldat,
bool enable)
static void __lpc_eth_clock_enable(struct netdata_local *pldat, bool enable)
{
if (enable)
clk_enable(pldat->clk);
clk_prepare_enable(pldat->clk);
else
clk_disable(pldat->clk);
clk_disable_unprepare(pldat->clk);
}
static void __lpc_params_setup(struct netdata_local *pldat)
@ -1494,7 +1493,7 @@ err_out_free_irq:
err_out_iounmap:
iounmap(pldat->net_base);
err_out_disable_clocks:
clk_disable(pldat->clk);
clk_disable_unprepare(pldat->clk);
clk_put(pldat->clk);
err_out_free_dev:
free_netdev(ndev);
@ -1519,7 +1518,7 @@ static int lpc_eth_drv_remove(struct platform_device *pdev)
iounmap(pldat->net_base);
mdiobus_unregister(pldat->mii_bus);
mdiobus_free(pldat->mii_bus);
clk_disable(pldat->clk);
clk_disable_unprepare(pldat->clk);
clk_put(pldat->clk);
free_netdev(ndev);
@ -1540,7 +1539,7 @@ static int lpc_eth_drv_suspend(struct platform_device *pdev,
if (netif_running(ndev)) {
netif_device_detach(ndev);
__lpc_eth_shutdown(pldat);
clk_disable(pldat->clk);
clk_disable_unprepare(pldat->clk);
/*
* Reset again now clock is disable to be sure