From 96b45ea5dc19425ca04b53ab2b56af9e2bcc28c6 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Thu, 18 Feb 2016 13:52:46 +0100 Subject: PCI/AER: Log actual error causes in aer_inject The aer_inject driver is very quiet. In most cases, it merely returns an error code to user-space, leaving the user with little clue about the actual reason for the failure. So, log error messages for 4 of the most frequent causes of failure: * Can't find the root port of the specified device. * Device doesn't support AER. * Root port doesn't support AER. * AER device not found. This gives the user a chance to understand why aer-inject failed. Based on a preliminary patch by Thomas Renninger. Signed-off-by: Jean Delvare Signed-off-by: Bjorn Helgaas CC: Borislav Petkov CC: Thomas Renninger --- drivers/pci/pcie/aer/aer_inject.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'drivers/pci') diff --git a/drivers/pci/pcie/aer/aer_inject.c b/drivers/pci/pcie/aer/aer_inject.c index 3e9fdd5f9330..44ed4ded3846 100644 --- a/drivers/pci/pcie/aer/aer_inject.c +++ b/drivers/pci/pcie/aer/aer_inject.c @@ -358,12 +358,14 @@ static int aer_inject(struct aer_error_inj *einj) return -ENODEV; rpdev = pcie_find_root_port(dev); if (!rpdev) { + dev_err(&dev->dev, "aer_inject: Root port not found\n"); ret = -ENODEV; goto out_put; } pos_cap_err = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR); if (!pos_cap_err) { + dev_err(&dev->dev, "aer_inject: Device doesn't support AER\n"); ret = -EPROTONOSUPPORT; goto out_put; } @@ -374,6 +376,8 @@ static int aer_inject(struct aer_error_inj *einj) rp_pos_cap_err = pci_find_ext_capability(rpdev, PCI_EXT_CAP_ID_ERR); if (!rp_pos_cap_err) { + dev_err(&rpdev->dev, + "aer_inject: Root port doesn't support AER\n"); ret = -EPROTONOSUPPORT; goto out_put; } @@ -489,8 +493,10 @@ static int aer_inject(struct aer_error_inj *einj) goto out_put; } aer_irq(-1, edev); - } else + } else { + dev_err(&rpdev->dev, "aer_inject: AER device not found\n"); ret = -ENODEV; + } out_put: kfree(err_alloc); kfree(rperr_alloc); -- cgit v1.2.3