Re: [PATCH 1/2] dmaengine: ioat: Drop redundant pci_enable_pcie_error_reporting()

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On 3/7/23 12:26 PM, Bjorn Helgaas wrote:
From: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>

pci_enable_pcie_error_reporting() enables the device to send ERR_*
Messages.  Since f26e58bf6f54 ("PCI/AER: Enable error reporting when AER is
native"), the PCI core does this for all devices during enumeration, so the
driver doesn't need to do it itself.

Remove the redundant pci_enable_pcie_error_reporting() call from the
driver.  Also remove the corresponding pci_disable_pcie_error_reporting()
from the driver .remove() path.

Note that this only controls ERR_* Messages from the device.  An ERR_*
Message may cause the Root Port to generate an interrupt, depending on the
AER Root Error Command register managed by the AER service driver.

Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>

Acked-by: Dave Jiang <dave.jiang@xxxxxxxxx>

---
  drivers/dma/ioat/init.c | 6 ------
  1 file changed, 6 deletions(-)

diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c
index 5d707ff63554..6ca62edf47bd 100644
--- a/drivers/dma/ioat/init.c
+++ b/drivers/dma/ioat/init.c
@@ -15,7 +15,6 @@
  #include <linux/workqueue.h>
  #include <linux/prefetch.h>
  #include <linux/dca.h>
-#include <linux/aer.h>
  #include <linux/sizes.h>
  #include "dma.h"
  #include "registers.h"
@@ -1380,15 +1379,11 @@ static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
  		if (is_skx_ioat(pdev))
  			device->version = IOAT_VER_3_2;
  		err = ioat3_dma_probe(device, ioat_dca_enabled);
-
-		if (device->version >= IOAT_VER_3_3)
-			pci_enable_pcie_error_reporting(pdev);
  	} else
  		return -ENODEV;
if (err) {
  		dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n");
-		pci_disable_pcie_error_reporting(pdev);
  		return -ENODEV;
  	}
@@ -1411,7 +1406,6 @@ static void ioat_remove(struct pci_dev *pdev)
  		device->dca = NULL;
  	}
- pci_disable_pcie_error_reporting(pdev);
  	ioat_dma_remove(device);
  }



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