greybus-dev

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881 discussions

[PATCH] staging: greybus: Replace sprintf with sysfs_emit

by Mohammad Davoudi

Replace sprintf() with sysfs_emit() in sysfs show functions. The sprintf() function is unaware of the PAGE_SIZE limit of the sysfs buffer, which can potentially lead to buffer overruns. sysfs_emit() is strictly designed for sysfs attributes and inherently protects against buffer boundaries. Signed-off-by: Mohammad Davoudi <MDavoudi2011(a)gmail.com> --- drivers/staging/greybus/gbphy.c | 2 +- drivers/staging/greybus/light.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/staging/greybus/gbphy.c b/drivers/staging/greybus/gbphy.c index bdb0f5164..bb9a5b538 100644 --- a/drivers/staging/greybus/gbphy.c +++ b/drivers/staging/greybus/gbphy.c @@ -31,7 +31,7 @@ static ssize_t protocol_id_show(struct device *dev, { struct gbphy_device *gbphy_dev = to_gbphy_dev(dev); - return sprintf(buf, "0x%02x\n", gbphy_dev->cport_desc->protocol_id); + return sysfs_emit(buf, "0x%02x\n", gbphy_dev->cport_desc->protocol_id); } static DEVICE_ATTR_RO(protocol_id); diff --git a/drivers/staging/greybus/light.c b/drivers/staging/greybus/light.c index cab02b5da..2689f9a75 100644 --- a/drivers/staging/greybus/light.c +++ b/drivers/staging/greybus/light.c @@ -173,7 +173,7 @@ static ssize_t fade_##__dir##_show(struct device *dev, \ struct led_classdev *cdev = dev_get_drvdata(dev); \ struct gb_channel *channel = get_channel_from_cdev(cdev); \ \ - return sprintf(buf, "%u\n", channel->fade_##__dir); \ + return sysfs_emit(buf, "%u\n", channel->fade_##__dir); \ } \ \ static ssize_t fade_##__dir##_store(struct device *dev, \ @@ -220,7 +220,7 @@ static ssize_t color_show(struct device *dev, struct device_attribute *attr, struct led_classdev *cdev = dev_get_drvdata(dev); struct gb_channel *channel = get_channel_from_cdev(cdev); - return sprintf(buf, "0x%08x\n", channel->color); + return sysfs_emit(buf, "0x%08x\n", channel->color); } static ssize_t color_store(struct device *dev, struct device_attribute *attr, -- 2.43.0

3 months

[PATCH v3] staging: greybus: uart: return tty_alloc_driver() errors

by Alfie Varghese

gb_tty_init() maps any tty_alloc_driver() failure to -ENOMEM. tty_alloc_driver() currently always returns -ENOMEM on failure, so this does not change behavior in practice. However, returning PTR_ERR(gb_tty_driver) is more correct and consistent with kernel conventions, preserving any future error codes the function might return. Signed-off-by: Alfie Varghese <alfievarghese22(a)gmail.com> --- v3: resend, v2 was corrupted in transit. No code changes. v2: updated commit message per Dan Carpenter's review to clarify that tty_alloc_driver() currently only returns -ENOMEM, making this a style fix rather than a behavioral change. --- drivers/staging/greybus/uart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c index 7d060b4cd33d..24b4dab069c3 100644 --- a/drivers/staging/greybus/uart.c +++ b/drivers/staging/greybus/uart.c @@ -951,7 +951,7 @@ static int gb_tty_init(void) TTY_DRIVER_DYNAMIC_DEV); if (IS_ERR(gb_tty_driver)) { pr_err("Can not allocate tty driver\n"); - retval = -ENOMEM; + retval = PTR_ERR(gb_tty_driver); goto fail_unregister_dev; } -- 2.54.0.windows.1

3 months

[PATCH v2] staging: greybus: uart: return tty_alloc_driver() errors

by Alfie Varghese

gb_tty_init() maps any tty_alloc_driver() failure to -ENOMEM. tty_alloc_driver() currently always returns -ENOMEM on failure, so this does not change behavior in practice. However, returning PTR_ERR(gb_tty_driver) is more correct and consistent with kernel conventions, preserving any future error codes the function might return. Signed-off-by: Alfie Varghese <alfievarghese22(a)gmail.com> --- v2: updated commit message per Dan Carpenter's review to clarify that tty_alloc_driver() currently only returns -ENOMEM, making this a style fix rather than a behavioral change. drivers/staging/greybus/uart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c index 7d060b4cd33d..24b4dab069c3 100644 --- a/drivers/staging/greybus/uart.c +++ b/drivers/staging/greybus/uart.c @@ -951,7 +951,7 @@ static int gb_tty_init(void) if (IS_ERR(gb_tty_driver)) { pr_err("Can not allocate tty driver\n"); - retval = -ENOMEM; + retval = PTR_ERR(gb_tty_driver); goto fail_unregister_dev; }

3 months

[PATCH] staging: greybus: uart: return tty_alloc_driver() errors

by Alfie Varghese

gb_tty_init() maps any tty_alloc_driver() failure to -ENOMEM. This loses the real errno returned by the driver core and makes failures harder to diagnose correctly. Return PTR_ERR(gb_tty_driver) instead so callers receive the actual failure reason while preserving the existing cleanup path. Signed-off-by: Alfie Varghese <alfievarghese22(a)gmail.com> --- drivers/staging/greybus/uart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c index 7d060b4cd33d..24b4dab069c3 100644 --- a/drivers/staging/greybus/uart.c +++ b/drivers/staging/greybus/uart.c @@ -951,7 +951,7 @@ static int gb_tty_init(void) TTY_DRIVER_DYNAMIC_DEV); if (IS_ERR(gb_tty_driver)) { pr_err("Can not allocate tty driver\n"); - retval = -ENOMEM; + retval = PTR_ERR(gb_tty_driver); goto fail_unregister_dev; } -- 2.54.0.windows.1

3 months

[PATCH] staging: greybus: hid: fix SET_REPORT return value

by Hao-Qun Huang

__gb_hid_output_raw_report() stores the result of gb_hid_set_report() in ret and even adjusts it to account for the report ID byte, but then always returns 0. This hides Greybus transport errors from HID_REQ_SET_REPORT callers, and makes hidraw report zero bytes written to user space on success, although hid_hw_raw_request() is expected to return the number of bytes transferred or a negative errno. The sibling GET_REPORT path, __gb_hid_get_raw_report(), already follows this convention. Return ret like the other HID transport drivers do. Fixes: 96eab779e198 ("greybus: hid: add HID class driver") Cc: stable(a)vger.kernel.org Assisted-by: Claude:claude-fable-5 Signed-off-by: Hao-Qun Huang <alvinhuang0603(a)gmail.com> --- diff --git a/drivers/staging/greybus/hid.c b/drivers/staging/greybus/hid.c index f1f9f6fbc00e..1d7186eecd23 100644 --- a/drivers/staging/greybus/hid.c +++ b/drivers/staging/greybus/hid.c @@ -256,7 +256,7 @@ static int __gb_hid_output_raw_report(struct hid_device *hid, __u8 *buf, if (report_id && ret >= 0) ret++; /* add report_id to the number of transferred bytes */ - return 0; + return ret; } static int gb_hid_raw_request(struct hid_device *hid, unsigned char reportnum,

3 months, 1 week

[PATCH 0/2] Bring includes in linux/kmod.h up to date

by Petr Pavlu

The usermode helper declarations were previously provided by linux/kmod.h but commit c1f3fa2a4fde ("kmod: split off umh headers into its own file") moved them to linux/umh.h in 2017. Add explicit includes of linux/umh.h to files that use usermode helpers and remove linux/kmod.h where it is no longer needed. Then clean up linux/kmod.h so that it includes only the headers that it actually requires, importantly removing the compat linux/umh.h include. Apologies for the wide distribution. This cleanup is motivated by trying to reduce the preprocessed size of linux/module.h, which includes linux/kmod.h. The linux/module.h header is included by every *.mod.c file to provide `struct module` and other related definitions, so it should avoid pulling in unnecessary dependencies. Note that this series doesn't immediately improve the situation, since most of the files included by linux/kmod.h are, for now, also included by linux/module.h through other paths. Petr Pavlu (2): umh, treewide: Explicitly include linux/umh.h where needed module: Bring includes in linux/kmod.h up to date arch/x86/kernel/cpu/mce/dev-mcelog.c | 2 +- drivers/block/drbd/drbd_nl.c | 1 + drivers/greybus/svc_watchdog.c | 1 + drivers/macintosh/windfarm_core.c | 1 + drivers/pnp/pnpbios/core.c | 2 +- drivers/video/fbdev/uvesafb.c | 1 + fs/coredump.c | 2 +- fs/nfs/cache_lib.c | 2 +- fs/nfsd/nfs4layouts.c | 2 +- fs/nfsd/nfs4recover.c | 1 + fs/ocfs2/stackglue.c | 1 + include/linux/kmod.h | 12 ++---------- kernel/cgroup/cgroup-v1.c | 1 + kernel/module/kmod.c | 1 + kernel/power/process.c | 2 +- kernel/reboot.c | 2 +- kernel/umh.c | 2 +- lib/kobject_uevent.c | 2 +- net/bridge/br_stp_if.c | 2 +- security/keys/request_key.c | 2 +- security/tomoyo/common.h | 2 +- 21 files changed, 22 insertions(+), 22 deletions(-) base-commit: dc59e4fea9d83f03bad6bddf3fa2e52491777482 -- 2.54.0

3 months, 1 week

[RFC] staging: greybus: arche still depends on missing USB3613 provider

by Pengpeng Hou

Hi, while auditing conditional provider/header contracts, I noticed that Greybus Arche still appears to describe a USB3613 provider world that is absent from current mainline. drivers/staging/greybus/Kconfig still has: depends on USB_HSIC_USB3613 || COMPILE_TEST and drivers/staging/greybus/arche-platform.c still conditionally includes the USB3613 header and calls usb3613_hub_mode_ctrl() when CONFIG_USB_HSIC_USB3613 is enabled. However, the current tree does not appear to provide include/linux/usb/usb3613.h or a Kconfig provider for USB_HSIC_USB3613. I am not sending a patch yet because this is staging/hardware policy sensitive. The possible directions seem to be: 1. restore or move the USB3613 provider/header if the hardware path is still intended; 2. remove the stale USB3613 integration path and rely on the local stub; 3. change the Kconfig dependency to describe only current supported worlds; or 4. keep the contract if an out-of-tree provider is intentionally expected. Could you advise which direction is expected for Arche? This is static source/Kconfig/header analysis only. I have not tested Arche hardware. Thanks, Pengpeng

3 months, 1 week

[staging] staging: greybus: loopback: add missing comment for mutex

by Arnav Kapoor

Add a comment for the mutex as suggested by checkpatch. Signed-off-by: Arnav Kapoor <kapoorarnav43(a)gmail.com> --- drivers/staging/greybus/loopback.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/greybus/loopback.c b/drivers/staging/greybus/loopback.c index ea57b1f5d..bf827e672 100644 --- a/drivers/staging/greybus/loopback.c +++ b/drivers/staging/greybus/loopback.c @@ -61,7 +61,7 @@ struct gb_loopback { struct dentry *file; struct kfifo kfifo_lat; - struct mutex mutex; + struct mutex mutex; /* protects the entire structure */ struct task_struct *task; struct device *dev; wait_queue_head_t wq; -- 2.53.0

3 months, 1 week

[PATCH v1] greybus: Drop #include of <linux/mod_devicetable.h>

by Uwe Kleine-König (The Capable Hub)

The header itself also includes <linux/types.h> and additional to that doesn't make use of any symbol defined (transitively) by <linux/mod_devicetable.h>. Also the .c files that include that header don't need it (there is no direct include, only via <linux/greybus.h>): $ git grep -l greybus\\.h | xargs grep -E "\<(acpi_device_id|amba_id|ap_device_id|apr_device_id|auxiliary_device_id|bcma_device_id|ccw_device_id|cdx_device_id|coreboot_device_id|css_device_id|dfl_device_id|dmi_(device|system)_id|eisa_device_id|fsl_mc_device_id|hda_device_id|hid_device_id|hv_vmbus_device_id|i2c_device_id|i3c_device_id|ieee1394_device_id|input_device_id|ipack_device_id|isapnp_device_id|ishtp_device_id|mcb_device_id|mdio_device_id|mei_cl_device_id|mhi_device_id|mips_cdmm_device_id|of_device_id|parisc_device_id|pci_device_id|pci_epf_device_id|pcmcia_device_id|platform_device_id|pnp_(card_)?device_id|rio_device_id|rpmsg_device_id|sdio_device_id|sdw_device_id|serio_device_id|slim_device_id|spi_device_id|spmi_device_id|ssam_device_id|ssb_device_id|tb_service_id|tee_client_device_id|typec_device_id|ulpi_device_id|usb_device_id|vchiq_device_id|virtio_device_id|wmi_device_id|x86_(cpu|device)_id|zorro_device_id|cpu_feature)\>" drivers/greybus/es2.c:static const struct usb_device_id id_table[] = { drivers/greybus/es2.c: const struct usb_device_id *id) drivers/greybus/gb-beagleplay.c:static const struct of_device_id gb_beagleplay_of_match[] = { drivers/staging/greybus/arche-platform.c:static const struct of_device_id arche_platform_of_match[] = { drivers/greybus/es2.c includes <linux/usb.h>, drivers/greybus/gb-beagleplay.c includes <linux/serdev.h> which provides of_device_id via <linux/device.h>, similar drivers/staging/greybus/arche-platform.c includes <linux/platform_device.h> which also provides of_device_id. So the #include can go away without further adaption. Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig(a)baylibre.com> --- include/linux/greybus/greybus_id.h | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/include/linux/greybus/greybus_id.h b/include/linux/greybus/greybus_id.h index f4c8440093e4..72f330a35569 100644 --- a/include/linux/greybus/greybus_id.h +++ b/include/linux/greybus/greybus_id.h @@ -1,14 +1,12 @@ /* SPDX-License-Identifier: GPL-2.0 */ /* FIXME - * move this to include/linux/mod_devicetable.h when merging + * move this to include/linux/device-id/greybus.h when merging */ #ifndef __LINUX_GREYBUS_ID_H #define __LINUX_GREYBUS_ID_H #include <linux/types.h> -#include <linux/mod_devicetable.h> - struct greybus_bundle_id { __u16 match_flags; base-commit: 8cdeaa50eae8dad34885515f62559ee83e7e8dda -- 2.55.0.11.g153666a7d9bb

3 months, 1 week

[PATCH] greybus: manifest: validate string descriptor header

by Pengpeng Hou

identify_descriptor() computes a string descriptor size from desc->string.length. Require the descriptor to contain the fixed string descriptor header before reading the variable string length. The existing descriptor-size check then reports the short descriptor. Signed-off-by: Pengpeng Hou <pengpeng(a)iscas.ac.cn> --- drivers/greybus/manifest.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/greybus/manifest.c b/drivers/greybus/manifest.c index 9be5d95da587..3b685ace2036 100644 --- a/drivers/greybus/manifest.c +++ b/drivers/greybus/manifest.c @@ -122,6 +122,8 @@ static int identify_descriptor(struct gb_interface *intf, switch (desc_header->type) { case GREYBUS_TYPE_STRING: expected_size += sizeof(struct greybus_descriptor_string); + if (desc_size < expected_size) + break; expected_size += desc->string.length; /* String descriptors are padded to 4 byte boundaries */ -- 2.43.0

3 months, 1 week

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