On 03/19/2018 09:38 AM, Simon Horman wrote:
> On Sun, Mar 18, 2018 at 11:52:52AM +0100, Marek Vasut wrote:
>> The data link active signal usually takes ~20 uSec to be asserted,
>> poll the bit more often to avoid useless delays in this function.
>>
>> Signed-off-by: Marek Vasut <marek.vasut+renesas@xxxxxxxxx>
>> Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
>> Cc: Phil Edworthy <phil.edworthy@xxxxxxxxxxx>
>> Cc: Simon Horman <horms+renesas@xxxxxxxxxxxx>
>> Cc: Wolfram Sang <wsa@xxxxxxxxxxxxx>
>> Cc: linux-renesas-soc@xxxxxxxxxxxxxxx
>
> Unless my eyes deceive me this seems to be quite a lot (100x) more often,
> but so be it.
It's just a higher frequency to avoid slowdown when bringing the link up.
> Reviewed-by: Simon Horman <horms+renesas@xxxxxxxxxxxx>
>
>
>> ---
>> drivers/pci/host/pcie-rcar.c | 4 ++--
>> 1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c
>> index 93d59f15c589..099998f1923a 100644
>> --- a/drivers/pci/host/pcie-rcar.c
>> +++ b/drivers/pci/host/pcie-rcar.c
>> @@ -528,13 +528,13 @@ static void phy_write_reg(struct rcar_pcie *pcie,
>>
>> static int rcar_pcie_wait_for_dl(struct rcar_pcie *pcie)
>> {
>> - unsigned int timeout = 10;
>> + unsigned int timeout = 10000;
>>
>> while (timeout--) {
>> if ((rcar_pci_read_reg(pcie, PCIETSTR) & DATA_LINK_ACTIVE))
>> return 0;
>>
>> - msleep(5);
>> + udelay(5);
>> }
>>
>> return -ETIMEDOUT;
>> --
>> 2.16.2
>>
--
Best regards,
Marek Vasut
