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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 21712fb9-4f72-4b37-c95b-08dd1aa7da84 X-MS-Exchange-CrossTenant-AuthSource: DU2PR04MB8822.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Dec 2024 12:23:58.8353 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: KwROA6n5+A+Y1mnz/htlXrTVRyJon09pxbq2FIAUutNRSWklYL5DfmLOmDEO82Cgvg3a0cGYAU6KR0jSzLmUsA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS1PR04MB9263 The tcpci_irq() may meet below NULL pointer dereference issue: [ 2.641851] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 [ 2.641951] status 0x1, 0x37f [ 2.650659] Mem abort info: [ 2.656490] ESR = 0x0000000096000004 [ 2.660230] EC = 0x25: DABT (current EL), IL = 32 bits [ 2.665532] SET = 0, FnV = 0 [ 2.668579] EA = 0, S1PTW = 0 [ 2.671715] FSC = 0x04: level 0 translation fault [ 2.676584] Data abort info: [ 2.679459] ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 [ 2.684936] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 [ 2.689980] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 2.695284] [0000000000000010] user address but active_mm is swapper [ 2.701632] Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP [ 2.707883] Modules linked in: [ 2.710936] CPU: 1 UID: 0 PID: 87 Comm: irq/111-2-0051 Not tainted 6.12.0-rc6-06316-g7f63786ad3d1-dirty #4 [ 2.720570] Hardware name: NXP i.MX93 11X11 EVK board (DT) [ 2.726040] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 2.732989] pc : tcpci_irq+0x38/0x318 [ 2.736647] lr : _tcpci_irq+0x14/0x20 [ 2.740295] sp : ffff80008324bd30 [ 2.743597] x29: ffff80008324bd70 x28: ffff800080107894 x27: ffff800082198f70 [ 2.750721] x26: ffff0000050e6680 x25: ffff000004d172ac x24: ffff0000050f0000 [ 2.757845] x23: ffff000004d17200 x22: 0000000000000001 x21: ffff0000050f0000 [ 2.764969] x20: ffff000004d17200 x19: 0000000000000000 x18: 0000000000000001 [ 2.772093] x17: 0000000000000000 x16: ffff80008183d8a0 x15: ffff00007fbab040 [ 2.779217] x14: ffff00007fb918c0 x13: 0000000000000000 x12: 000000000000017a [ 2.786341] x11: 0000000000000001 x10: 0000000000000a90 x9 : ffff80008324bd00 [ 2.793465] x8 : ffff0000050f0af0 x7 : ffff00007fbaa840 x6 : 0000000000000031 [ 2.800589] x5 : 000000000000017a x4 : 0000000000000002 x3 : 0000000000000002 [ 2.807713] x2 : ffff80008324bd3a x1 : 0000000000000010 x0 : 0000000000000000 [ 2.814838] Call trace: [ 2.817273] tcpci_irq+0x38/0x318 [ 2.820583] _tcpci_irq+0x14/0x20 [ 2.823885] irq_thread_fn+0x2c/0xa8 [ 2.827456] irq_thread+0x16c/0x2f4 [ 2.830940] kthread+0x110/0x114 [ 2.834164] ret_from_fork+0x10/0x20 [ 2.837738] Code: f9426420 f9001fe0 d2800000 52800201 (f9400a60) This may happen on shared irq case. Such as two Type-C ports share one irq. After the first port finished tcpci_register_port(), it may trigger interrupt. However, if the interrupt comes by chance the 2nd port finishes devm_request_threaded_irq(), the 2nd port interrupt handler may be run at first. Then the above issue may happen. devm_request_threaded_irq() <-- port1 irq comes disable_irq(client->irq); tcpci_register_port() This will restore the logic to the state before commit (77e85107a771 "usb: typec: tcpci: support edge irq"). Fixes: 77e85107a771 ("usb: typec: tcpci: support edge irq") Cc: stable@vger.kernel.org Signed-off-by: Xu Yang --- Changes in v2: - no changes --- drivers/usb/typec/tcpm/tcpci.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c index 2f15734a5043..db42f4bf3632 100644 --- a/drivers/usb/typec/tcpm/tcpci.c +++ b/drivers/usb/typec/tcpm/tcpci.c @@ -923,22 +923,20 @@ static int tcpci_probe(struct i2c_client *client) chip->data.set_orientation = err; + chip->tcpci = tcpci_register_port(&client->dev, &chip->data); + if (IS_ERR(chip->tcpci)) + return PTR_ERR(chip->tcpci); + err = devm_request_threaded_irq(&client->dev, client->irq, NULL, _tcpci_irq, IRQF_SHARED | IRQF_ONESHOT, dev_name(&client->dev), chip); - if (err < 0) + if (err < 0) { + tcpci_unregister_port(chip->tcpci); return err; + } - /* - * Disable irq while registering port. If irq is configured as an edge - * irq this allow to keep track and process the irq as soon as it is enabled. - */ - disable_irq(client->irq); - chip->tcpci = tcpci_register_port(&client->dev, &chip->data); - enable_irq(client->irq); - - return PTR_ERR_OR_ZERO(chip->tcpci); + return 0; } static void tcpci_remove(struct i2c_client *client)