[RFC PATCH 1/1] pci-imx6: add speed change timeout message

[troy.kisky@boundarydevices.com (Troy Kisky)]

On 5/21/2015 2:19 PM, Marek Vasut wrote:
> On Thursday, May 21, 2015 at 08:35:45 PM, Troy Kisky wrote:
>> Currently, the timeout is never detected as count
>> has a value of -1 if a timeout happens, but the code is checking
>> for 0.
>>
>> Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
>>
>> ---
>>
>> This patch breaks pcie for imx6sx as my board always times out.
>> So, if someone could check this on an imx6sx I'd appreciate it.
>>
>> Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
>> ---
>>  drivers/pci/host/pci-imx6.c | 18 ++++++++++--------
>>  1 file changed, 10 insertions(+), 8 deletions(-)
>>
>> diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
>> index fdb9536..51be92c 100644
>> --- a/drivers/pci/host/pci-imx6.c
>> +++ b/drivers/pci/host/pci-imx6.c
>> @@ -398,20 +398,22 @@ static int imx6_pcie_start_link(struct pcie_port *pp)
>>  	writel(tmp, pp->dbi_base + PCIE_LINK_WIDTH_SPEED_CONTROL);
>>
>>  	count = 200;
>> -	while (count--) {
> 
> Uh, wouldn't "while (--count)" fix this as well, with a smaller patch?
> 
> Best regards,
> Marek Vasut
> 

Yes, but you'd have an unnecessary usleep_range (no check for finished after it) if a
timeout happens.

Troy