p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

PCI/AER: Remove aerdriver.nosourceid kernel parameter 

The aerdriver.nosourceid kernel parameter was intended for working around
broken chipsets don't supply the source ID for AER events.  We recently
added PCI_BUS_FLAGS_NO_AERSID, which can be set by quirks for the same
purpose.

Remove the aerdriver.nosourceid kernel parameter.  For anything other than
debugging, asking users to find and use kernel parameters is a poor user
experience.  Instead, we should add PCI_BUS_FLAGS_NO_AERSID quirks for any
hardware that needs it.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Bjorn Helgaas 2016-09-06 16:09:19 -05:00
parent 443b40ba21
commit 9ff25e6b3e
2 changed files with 4 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/PCI/pcieaer-howto.txt
View File

@ -61,10 +61,6 @@ be initiated although firmwares have no _OSC support. To enable the
walkaround, pls. add aerdriver.forceload=y to kernel boot parameter line
when booting kernel. Note that forceload=n by default.
nosourceid, another parameter of type bool, can be used when broken
hardware (mostly chipsets) has root ports that cannot obtain the reporting
source ID. nosourceid=n by default.
2.3 AER error output
When a PCI-E AER error is captured, an error message will be outputted to
console. If it's a correctable error, it is outputted as a warning.

12
drivers/pci/pcie/aer/aerdrv_core.c
View File

@ -28,9 +28,7 @@
#include "aerdrv.h"
static bool forceload;
static bool nosourceid;
module_param(forceload, bool, 0);
module_param(nosourceid, bool, 0);
#define PCI_EXP_AER_FLAGS (PCI_EXP_DEVCTL_CERE | PCI_EXP_DEVCTL_NFERE | \
PCI_EXP_DEVCTL_FERE | PCI_EXP_DEVCTL_URRE)
@ -132,8 +130,7 @@ static bool is_error_source(struct pci_dev *dev, struct aer_err_info *e_info)
* When bus id is equal to 0, it might be a bad id
* reported by root port.
*/
if (!nosourceid &&
(PCI_BUS_NUM(e_info->id) != 0) &&
if ((PCI_BUS_NUM(e_info->id) != 0) &&
!(dev->bus->bus_flags & PCI_BUS_FLAGS_NO_AERSID)) {
/* Device ID match? */
if (e_info->id == ((dev->bus->number << 8) | dev->devfn))
@ -146,11 +143,10 @@ static bool is_error_source(struct pci_dev *dev, struct aer_err_info *e_info)
/*
* When either
* 1) nosourceid==y;
* 2) bus id is equal to 0. Some ports might lose the bus
* 1) bus id is equal to 0. Some ports might lose the bus
* id of error source id;
* 3) bus flag PCI_BUS_FLAGS_NO_AERSID is set
* 4) There are multiple errors and prior ID comparing fails;
* 2) bus flag PCI_BUS_FLAGS_NO_AERSID is set
* 3) There are multiple errors and prior ID comparing fails;
* We check AER status registers to find possible reporter.
*/
if (atomic_read(&dev->enable_cnt) == 0)