[dpdk-dev] [PATCH] igb_uio: remove device reset in release

[Ferruh Yigit <ferruh.yigit@intel.com>]

More error reported for device reset in release() [1],
when device pass-through to the guest, host kernel crash on guest exit.

Removing the reset completely.

[1]
http://dpdk.org/ml/archives/dev/2017-November/081459.html

Fixes: e3a64deae2d5 ("igb_uio: prevent reset for bnx2x devices")
Fixes: b58eedfc7dd5 ("igb_uio: issue FLR during open and release of device file")
Cc: stable@dpdk.org

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
---
Cc: Jianfeng Tan <jianfeng.tan@intel.com>
Cc: Jingjing Wu <jingjing.wu@intel.com>
Cc: Shijith Thotton <shijith.thotton@caviumnetworks.com>
Cc: Gregory Etelson <gregory@weka.io>
Cc: Harish Patil <harish.patil@cavium.com>
Cc: George Prekas <george.prekas@epfl.ch>
Cc: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>
Cc: Rasesh Mody <rasesh.mody@cavium.com>
Cc: Lee Roberts <lee.roberts@hpe.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: Chas Williams <chas3@att.com>
---
 lib/librte_eal/linuxapp/igb_uio/compat.h  | 19 -------------------
 lib/librte_eal/linuxapp/igb_uio/igb_uio.c |  8 --------
 2 files changed, 27 deletions(-)

diff --git a/lib/librte_eal/linuxapp/igb_uio/compat.h b/lib/librte_eal/linuxapp/igb_uio/compat.h
index c8b2c9de3..ce456d4bb 100644
--- a/lib/librte_eal/linuxapp/igb_uio/compat.h
+++ b/lib/librte_eal/linuxapp/igb_uio/compat.h
@@ -132,22 +132,3 @@ static bool pci_check_and_mask_intx(struct pci_dev *pdev)
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 5, 0)
 #define HAVE_PCI_MSI_MASK_IRQ 1
 #endif
-
-#define BROADCOM_PCI_VENDOR_ID 0x14E4
-static const struct pci_device_id no_reset_pci_tbl[] = {
-	{ PCI_DEVICE(BROADCOM_PCI_VENDOR_ID, 0x164f) }, /* 57711 */
-	{ PCI_DEVICE(BROADCOM_PCI_VENDOR_ID, 0x168a) }, /* 57800 */
-	{ PCI_DEVICE(BROADCOM_PCI_VENDOR_ID, 0x168e) }, /* 57810 */
-	{ PCI_DEVICE(BROADCOM_PCI_VENDOR_ID, 0x163d) }, /* 57811 */
-	{ PCI_DEVICE(BROADCOM_PCI_VENDOR_ID, 0x168d) }, /* 57840_OBS */
-	{ PCI_DEVICE(BROADCOM_PCI_VENDOR_ID, 0x16a1) }, /* 57840_4_10 */
-	{ PCI_DEVICE(BROADCOM_PCI_VENDOR_ID, 0x16a2) }, /* 57840_2_20 */
-	{ PCI_DEVICE(BROADCOM_PCI_VENDOR_ID, 0x16ae) }, /* 57810_MF */
-	{ PCI_DEVICE(BROADCOM_PCI_VENDOR_ID, 0x163e) }, /* 57811_MF */
-	{ PCI_DEVICE(BROADCOM_PCI_VENDOR_ID, 0x16a4) }, /* 57840_MF */
-	{ PCI_DEVICE(BROADCOM_PCI_VENDOR_ID, 0x16a9) }, /* 57800_VF */
-	{ PCI_DEVICE(BROADCOM_PCI_VENDOR_ID, 0x16af) }, /* 57810_VF */
-	{ PCI_DEVICE(BROADCOM_PCI_VENDOR_ID, 0x163f) }, /* 57811_VF */
-	{ PCI_DEVICE(BROADCOM_PCI_VENDOR_ID, 0x16ad) }, /* 57840_VF */
-	{ 0 },
-};
diff --git a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
index 037e02267..a3a98c173 100644
--- a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
+++ b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
@@ -348,11 +348,6 @@ igbuio_pci_open(struct uio_info *info, struct inode *inode)
 	return 0;
 }
 
-static bool is_device_excluded_from_reset(struct pci_dev *pdev)
-{
-	return !!pci_match_id(no_reset_pci_tbl, pdev);
-}
-
 static int
 igbuio_pci_release(struct uio_info *info, struct inode *inode)
 {
@@ -365,9 +360,6 @@ igbuio_pci_release(struct uio_info *info, struct inode *inode)
 	/* stop the device from further DMA */
 	pci_clear_master(dev);
 
-	if (!is_device_excluded_from_reset(dev))
-		pci_reset_function(dev);
-
 	return 0;
 }
 
-- 
2.13.6