lkml.org 
[lkml]   [2019]   [Aug]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v6 1/9] PCI/ERR: Update error status after reset_link()
From
Date
Hi,

On 8/15/19 3:16 PM, Bjorn Helgaas wrote:
> On Fri, Jul 26, 2019 at 02:43:11PM -0700, sathyanarayanan.kuppuswamy@linux.intel.com wrote:
>> From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
>>
>> Commit bdb5ac85777d ("PCI/ERR: Handle fatal error recovery") uses
>> reset_link() to recover from fatal errors. But, if the reset is
>> successful there is no need to continue the rest of the error recovery
>> checks. Also, during fatal error recovery, if the initial value of error
>> status is PCI_ERS_RESULT_DISCONNECT or PCI_ERS_RESULT_NO_AER_DRIVER then
>> even after successful recovery (using reset_link()) pcie_do_recovery()
>> will report the recovery result as failure. So update the status of
>> error after reset_link().
>>
>> Fixes: bdb5ac85777d ("PCI/ERR: Handle fatal error recovery")
>> Cc: Ashok Raj <ashok.raj@intel.com>
>> Cc: Keith Busch <keith.busch@intel.com>
>> Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
>> ---
>> drivers/pci/pcie/err.c | 11 ++++++++---
>> 1 file changed, 8 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c
>> index 773197a12568..aecec124a829 100644
>> --- a/drivers/pci/pcie/err.c
>> +++ b/drivers/pci/pcie/err.c
>> @@ -204,9 +204,13 @@ void pcie_do_recovery(struct pci_dev *dev, enum pci_channel_state state,
>> else
>> pci_walk_bus(bus, report_normal_detected, &status);
>>
>> - if (state == pci_channel_io_frozen &&
>> - reset_link(dev, service) != PCI_ERS_RESULT_RECOVERED)
>> - goto failed;
>> + if (state == pci_channel_io_frozen) {
>> + status = reset_link(dev, service);
>> + if (status != PCI_ERS_RESULT_RECOVERED)
>> + goto failed;
>> + else
>> + goto done;
> This will be easier to read without the negation, i.e.,
>
> if (status == PCI_ERS_RESULT_RECOVERED)
> goto done;
> else
> goto failed;
will change it in next version.

--
Sathyanarayanan Kuppuswamy
Linux kernel developer

\
 
 \ /
  Last update: 2019-08-16 00:58    [W:0.036 / U:0.404 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site