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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Aug 2021 12:35:20.2501 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a7915cea-10f2-41e5-165e-08d9567b2813 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT008.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB2891 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Sanjay R Mehta As per USB4 spec by default "Disable ISR Auto-Clear" bit is set to 0, and the Tx/Rx ring interrupt status is needs to be cleared. Hence handling it by reading the "Interrupt status" register in the ISR. Signed-off-by: Basavaraj Natikar Signed-off-by: Sanjay R Mehta --- drivers/thunderbolt/nhi.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/thunderbolt/nhi.c b/drivers/thunderbolt/nhi.c index ef01aa6..7ad2202 100644 --- a/drivers/thunderbolt/nhi.c +++ b/drivers/thunderbolt/nhi.c @@ -373,11 +373,25 @@ void tb_ring_poll_complete(struct tb_ring *ring) } EXPORT_SYMBOL_GPL(tb_ring_poll_complete); +static void check_and_clear_intr_status(struct tb_ring *ring) +{ + if (!(ring->nhi->pdev->vendor == PCI_VENDOR_ID_INTEL)) { + if (ring->is_tx) + ioread32(ring->nhi->iobase + + REG_RING_NOTIFY_BASE); + else + ioread32(ring->nhi->iobase + + REG_RING_NOTIFY_BASE + + 4 * (ring->nhi->hop_count / 32)); + } +} + static irqreturn_t ring_msix(int irq, void *data) { struct tb_ring *ring = data; spin_lock(&ring->nhi->lock); + check_and_clear_intr_status(ring); spin_lock(&ring->lock); __ring_interrupt(ring); spin_unlock(&ring->lock); -- 2.7.4