diff options
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/Kconfig | 5 | ||||
| -rw-r--r-- | drivers/firmware/arm_ffa/bus.c | 10 | ||||
| -rw-r--r-- | drivers/firmware/arm_scmi/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/firmware/arm_scmi/virtio.c | 44 | ||||
| -rw-r--r-- | drivers/firmware/efi/cper.c | 4 | ||||
| -rw-r--r-- | drivers/firmware/efi/libstub/fdt.c | 2 | ||||
| -rw-r--r-- | drivers/firmware/efi/runtime-wrappers.c | 2 |
7 files changed, 46 insertions, 23 deletions
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index 220a58cf0a44..cda7d7162cbb 100644 --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -203,10 +203,7 @@ config INTEL_STRATIX10_RSU Say Y here if you want Intel RSU support. config QCOM_SCM - tristate "Qcom SCM driver" - depends on ARM || ARM64 - depends on HAVE_ARM_SMCCC - select RESET_CONTROLLER + tristate config QCOM_SCM_DOWNLOAD_MODE_DEFAULT bool "Qualcomm download mode enabled by default" diff --git a/drivers/firmware/arm_ffa/bus.c b/drivers/firmware/arm_ffa/bus.c index 00fe595a5bc8..641a91819088 100644 --- a/drivers/firmware/arm_ffa/bus.c +++ b/drivers/firmware/arm_ffa/bus.c @@ -49,6 +49,13 @@ static int ffa_device_probe(struct device *dev) return ffa_drv->probe(ffa_dev); } +static void ffa_device_remove(struct device *dev) +{ + struct ffa_driver *ffa_drv = to_ffa_driver(dev->driver); + + ffa_drv->remove(to_ffa_dev(dev)); +} + static int ffa_device_uevent(struct device *dev, struct kobj_uevent_env *env) { struct ffa_device *ffa_dev = to_ffa_dev(dev); @@ -86,6 +93,7 @@ struct bus_type ffa_bus_type = { .name = "arm_ffa", .match = ffa_device_match, .probe = ffa_device_probe, + .remove = ffa_device_remove, .uevent = ffa_device_uevent, .dev_groups = ffa_device_attributes_groups, }; @@ -127,7 +135,7 @@ static void ffa_release_device(struct device *dev) static int __ffa_devices_unregister(struct device *dev, void *data) { - ffa_release_device(dev); + device_unregister(dev); return 0; } diff --git a/drivers/firmware/arm_scmi/Kconfig b/drivers/firmware/arm_scmi/Kconfig index 7f4d2435503b..3d7081e84853 100644 --- a/drivers/firmware/arm_scmi/Kconfig +++ b/drivers/firmware/arm_scmi/Kconfig @@ -68,7 +68,7 @@ config ARM_SCMI_TRANSPORT_SMC config ARM_SCMI_TRANSPORT_VIRTIO bool "SCMI transport based on VirtIO" - depends on VIRTIO + depends on VIRTIO=y || VIRTIO=ARM_SCMI_PROTOCOL select ARM_SCMI_HAVE_TRANSPORT select ARM_SCMI_HAVE_MSG help diff --git a/drivers/firmware/arm_scmi/virtio.c b/drivers/firmware/arm_scmi/virtio.c index 224577f86928..11e8efb71375 100644 --- a/drivers/firmware/arm_scmi/virtio.c +++ b/drivers/firmware/arm_scmi/virtio.c @@ -110,18 +110,16 @@ static void scmi_finalize_message(struct scmi_vio_channel *vioch, if (vioch->is_rx) { scmi_vio_feed_vq_rx(vioch, msg); } else { - unsigned long flags; - - spin_lock_irqsave(&vioch->lock, flags); + /* Here IRQs are assumed to be already disabled by the caller */ + spin_lock(&vioch->lock); list_add(&msg->list, &vioch->free_list); - spin_unlock_irqrestore(&vioch->lock, flags); + spin_unlock(&vioch->lock); } } static void scmi_vio_complete_cb(struct virtqueue *vqueue) { unsigned long ready_flags; - unsigned long flags; unsigned int length; struct scmi_vio_channel *vioch; struct scmi_vio_msg *msg; @@ -140,7 +138,8 @@ static void scmi_vio_complete_cb(struct virtqueue *vqueue) goto unlock_ready_out; } - spin_lock_irqsave(&vioch->lock, flags); + /* IRQs already disabled here no need to irqsave */ + spin_lock(&vioch->lock); if (cb_enabled) { virtqueue_disable_cb(vqueue); cb_enabled = false; @@ -151,7 +150,7 @@ static void scmi_vio_complete_cb(struct virtqueue *vqueue) goto unlock_out; cb_enabled = true; } - spin_unlock_irqrestore(&vioch->lock, flags); + spin_unlock(&vioch->lock); if (msg) { msg->rx_len = length; @@ -161,11 +160,18 @@ static void scmi_vio_complete_cb(struct virtqueue *vqueue) scmi_finalize_message(vioch, msg); } + /* + * Release ready_lock and re-enable IRQs between loop iterations + * to allow virtio_chan_free() to possibly kick in and set the + * flag vioch->ready to false even in between processing of + * messages, so as to force outstanding messages to be ignored + * when system is shutting down. + */ spin_unlock_irqrestore(&vioch->ready_lock, ready_flags); } unlock_out: - spin_unlock_irqrestore(&vioch->lock, flags); + spin_unlock(&vioch->lock); unlock_ready_out: spin_unlock_irqrestore(&vioch->ready_lock, ready_flags); } @@ -384,8 +390,11 @@ static int scmi_vio_probe(struct virtio_device *vdev) struct virtqueue *vqs[VIRTIO_SCMI_VQ_MAX_CNT]; /* Only one SCMI VirtiO device allowed */ - if (scmi_vdev) - return -EINVAL; + if (scmi_vdev) { + dev_err(dev, + "One SCMI Virtio device was already initialized: only one allowed.\n"); + return -EBUSY; + } have_vq_rx = scmi_vio_have_vq_rx(vdev); vq_cnt = have_vq_rx ? VIRTIO_SCMI_VQ_MAX_CNT : 1; @@ -428,16 +437,25 @@ static int scmi_vio_probe(struct virtio_device *vdev) } vdev->priv = channels; - scmi_vdev = vdev; + /* Ensure initialized scmi_vdev is visible */ + smp_store_mb(scmi_vdev, vdev); return 0; } static void scmi_vio_remove(struct virtio_device *vdev) { + /* + * Once we get here, virtio_chan_free() will have already been called by + * the SCMI core for any existing channel and, as a consequence, all the + * virtio channels will have been already marked NOT ready, causing any + * outstanding message on any vqueue to be ignored by complete_cb: now + * we can just stop processing buffers and destroy the vqueues. + */ vdev->config->reset(vdev); vdev->config->del_vqs(vdev); - scmi_vdev = NULL; + /* Ensure scmi_vdev is visible as NULL */ + smp_store_mb(scmi_vdev, NULL); } static int scmi_vio_validate(struct virtio_device *vdev) @@ -476,7 +494,7 @@ static int __init virtio_scmi_init(void) return register_virtio_driver(&virtio_scmi_driver); } -static void __exit virtio_scmi_exit(void) +static void virtio_scmi_exit(void) { unregister_virtio_driver(&virtio_scmi_driver); } diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c index 73bdbd207e7a..6ec8edec6329 100644 --- a/drivers/firmware/efi/cper.c +++ b/drivers/firmware/efi/cper.c @@ -25,8 +25,6 @@ #include <acpi/ghes.h> #include <ras/ras_event.h> -static char rcd_decode_str[CPER_REC_LEN]; - /* * CPER record ID need to be unique even after reboot, because record * ID is used as index for ERST storage, while CPER records from @@ -312,6 +310,7 @@ const char *cper_mem_err_unpack(struct trace_seq *p, struct cper_mem_err_compact *cmem) { const char *ret = trace_seq_buffer_ptr(p); + char rcd_decode_str[CPER_REC_LEN]; if (cper_mem_err_location(cmem, rcd_decode_str)) trace_seq_printf(p, "%s", rcd_decode_str); @@ -326,6 +325,7 @@ static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem, int len) { struct cper_mem_err_compact cmem; + char rcd_decode_str[CPER_REC_LEN]; /* Don't trust UEFI 2.1/2.2 structure with bad validation bits */ if (len == sizeof(struct cper_sec_mem_err_old) && diff --git a/drivers/firmware/efi/libstub/fdt.c b/drivers/firmware/efi/libstub/fdt.c index 365c3a43a198..fe567be0f118 100644 --- a/drivers/firmware/efi/libstub/fdt.c +++ b/drivers/firmware/efi/libstub/fdt.c @@ -271,7 +271,7 @@ efi_status_t allocate_new_fdt_and_exit_boot(void *handle, return status; } - efi_info("Exiting boot services and installing virtual address map...\n"); + efi_info("Exiting boot services...\n"); map.map = &memory_map; status = efi_allocate_pages(MAX_FDT_SIZE, new_fdt_addr, ULONG_MAX); diff --git a/drivers/firmware/efi/runtime-wrappers.c b/drivers/firmware/efi/runtime-wrappers.c index 1410beaef5c3..f3e54f6616f0 100644 --- a/drivers/firmware/efi/runtime-wrappers.c +++ b/drivers/firmware/efi/runtime-wrappers.c @@ -414,7 +414,7 @@ static void virt_efi_reset_system(int reset_type, unsigned long data_size, efi_char16_t *data) { - if (down_interruptible(&efi_runtime_lock)) { + if (down_trylock(&efi_runtime_lock)) { pr_warn("failed to invoke the reset_system() runtime service:\n" "could not get exclusive access to the firmware\n"); return; |