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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: 73b4299e-ab83-40fb-5346-08dbb51b26d8 X-MS-Exchange-CrossTenant-AuthSource: DB7PR04MB4505.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Sep 2023 12:07:22.6050 (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: +8PqfEiOpsp2XM8hp5z2pUeo2fMrbUT1EoySChWteDfiPysm4H0QDaSnm080N/mXaNo9b+9wV9uRnIHuU2sgow== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM9PR04MB8486 The return value from tcpci/regmap_read/write() must be checked to get rid of the bad influence of other modules. This will add check code for all of the rest read/write() callbacks and will show error when failed to get ALERT register. Signed-off-by: Xu Yang --- Changes in v2: - remove printing code --- drivers/usb/typec/tcpm/tcpci.c | 34 +++++++++++++++++++++++++--------- 1 file changed, 25 insertions(+), 9 deletions(-) diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c index 0ee3e6e29bb1..8ccc2d1a8ffc 100644 --- a/drivers/usb/typec/tcpm/tcpci.c +++ b/drivers/usb/typec/tcpm/tcpci.c @@ -657,21 +657,28 @@ irqreturn_t tcpci_irq(struct tcpci *tcpci) int ret; unsigned int raw; - tcpci_read16(tcpci, TCPC_ALERT, &status); + ret = tcpci_read16(tcpci, TCPC_ALERT, &status); + if (ret < 0) + return ret; /* * Clear alert status for everything except RX_STATUS, which shouldn't * be cleared until we have successfully retrieved message. */ - if (status & ~TCPC_ALERT_RX_STATUS) - tcpci_write16(tcpci, TCPC_ALERT, + if (status & ~TCPC_ALERT_RX_STATUS) { + ret = tcpci_write16(tcpci, TCPC_ALERT, status & ~TCPC_ALERT_RX_STATUS); + if (ret < 0) + return ret; + } if (status & TCPC_ALERT_CC_STATUS) tcpm_cc_change(tcpci->port); if (status & TCPC_ALERT_POWER_STATUS) { - regmap_read(tcpci->regmap, TCPC_POWER_STATUS_MASK, &raw); + ret = regmap_read(tcpci->regmap, TCPC_POWER_STATUS_MASK, &raw); + if (ret < 0) + return ret; /* * If power status mask has been reset, then the TCPC * has reset. @@ -687,7 +694,9 @@ irqreturn_t tcpci_irq(struct tcpci *tcpci) unsigned int cnt, payload_cnt; u16 header; - regmap_read(tcpci->regmap, TCPC_RX_BYTE_CNT, &cnt); + ret = regmap_read(tcpci->regmap, TCPC_RX_BYTE_CNT, &cnt); + if (ret < 0) + return ret; /* * 'cnt' corresponds to READABLE_BYTE_COUNT in section 4.4.14 * of the TCPCI spec [Rev 2.0 Ver 1.0 October 2017] and is @@ -699,18 +708,25 @@ irqreturn_t tcpci_irq(struct tcpci *tcpci) else payload_cnt = 0; - tcpci_read16(tcpci, TCPC_RX_HDR, &header); + ret = tcpci_read16(tcpci, TCPC_RX_HDR, &header); + if (ret < 0) + return ret; msg.header = cpu_to_le16(header); if (WARN_ON(payload_cnt > sizeof(msg.payload))) payload_cnt = sizeof(msg.payload); - if (payload_cnt > 0) - regmap_raw_read(tcpci->regmap, TCPC_RX_DATA, + if (payload_cnt > 0) { + ret = regmap_raw_read(tcpci->regmap, TCPC_RX_DATA, &msg.payload, payload_cnt); + if (ret < 0) + return ret; + } /* Read complete, clear RX status alert bit */ - tcpci_write16(tcpci, TCPC_ALERT, TCPC_ALERT_RX_STATUS); + ret = tcpci_write16(tcpci, TCPC_ALERT, TCPC_ALERT_RX_STATUS); + if (ret < 0) + return ret; tcpm_pd_receive(tcpci->port, &msg); }