diff options
Diffstat (limited to 'drivers/firmware/arm_scmi/driver.c')
| -rw-r--r-- | drivers/firmware/arm_scmi/driver.c | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 08787aed5519..2d5aaff5e3ec 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -113,6 +113,7 @@ struct scmi_chan_info { * implementation version and (sub-)vendor identification. * @minfo: Message info * @tx_idr: IDR object to map protocol id to Tx channel info pointer + * @rx_idr: IDR object to map protocol id to Rx channel info pointer * @protocols_imp: List of protocols implemented, currently maximum of * MAX_PROTOCOLS_IMP elements allocated by the base protocol * @node: List head @@ -125,6 +126,7 @@ struct scmi_info { struct scmi_handle handle; struct scmi_xfers_info minfo; struct idr tx_idr; + struct idr rx_idr; u8 *protocols_imp; struct list_head node; int users; @@ -655,13 +657,17 @@ static int scmi_mbox_chan_setup(struct scmi_info *info, struct device *dev, struct device_node *shmem, *np = dev->of_node; struct scmi_chan_info *cinfo; struct mbox_client *cl; + struct idr *idr; const char *desc = tx ? "Tx" : "Rx"; /* Transmit channel is first entry i.e. index 0 */ idx = tx ? 0 : 1; + idr = tx ? &info->tx_idr : &info->rx_idr; if (scmi_mailbox_check(np, idx)) { - cinfo = idr_find(&info->tx_idr, SCMI_PROTOCOL_BASE); + cinfo = idr_find(idr, SCMI_PROTOCOL_BASE); + if (unlikely(!cinfo)) /* Possible only if platform has no Rx */ + return -EINVAL; goto idr_alloc; } @@ -703,7 +709,7 @@ static int scmi_mbox_chan_setup(struct scmi_info *info, struct device *dev, } idr_alloc: - ret = idr_alloc(&info->tx_idr, cinfo, prot_id, prot_id + 1, GFP_KERNEL); + ret = idr_alloc(idr, cinfo, prot_id, prot_id + 1, GFP_KERNEL); if (ret != prot_id) { dev_err(dev, "unable to allocate SCMI idr slot err %d\n", ret); return ret; @@ -713,6 +719,17 @@ idr_alloc: return 0; } +static inline int +scmi_mbox_txrx_setup(struct scmi_info *info, struct device *dev, int prot_id) +{ + int ret = scmi_mbox_chan_setup(info, dev, prot_id, true); + + if (!ret) /* Rx is optional, hence no error check */ + scmi_mbox_chan_setup(info, dev, prot_id, false); + + return ret; +} + static inline void scmi_create_protocol_device(struct device_node *np, struct scmi_info *info, int prot_id) @@ -726,7 +743,7 @@ scmi_create_protocol_device(struct device_node *np, struct scmi_info *info, return; } - if (scmi_mbox_chan_setup(info, &sdev->dev, prot_id, true)) { + if (scmi_mbox_txrx_setup(info, &sdev->dev, prot_id)) { dev_err(&sdev->dev, "failed to setup transport\n"); scmi_device_destroy(sdev); return; @@ -769,12 +786,13 @@ static int scmi_probe(struct platform_device *pdev) platform_set_drvdata(pdev, info); idr_init(&info->tx_idr); + idr_init(&info->rx_idr); handle = &info->handle; handle->dev = info->dev; handle->version = &info->version; - ret = scmi_mbox_chan_setup(info, dev, SCMI_PROTOCOL_BASE, true); + ret = scmi_mbox_txrx_setup(info, dev, SCMI_PROTOCOL_BASE); if (ret) return ret; @@ -844,6 +862,10 @@ static int scmi_remove(struct platform_device *pdev) ret = idr_for_each(idr, scmi_mbox_free_channel, idr); idr_destroy(&info->tx_idr); + idr = &info->rx_idr; + ret = idr_for_each(idr, scmi_mbox_free_channel, idr); + idr_destroy(&info->rx_idr); + return ret; } |