kernel/git/stable/linux-stable.git/drivers/bus, branch linux-rolling-lts

syscore: Pass context data to callbacks

2026-09-14T11:36:10+00:00

[ Upstream commit a97fbc3ee3e2a536fafaff04f21f45472db71769 ] Several drivers can benefit from registering per-instance data along with the syscore operations. To achieve this, move the modifiable fields out of the syscore_ops structure and into a separate struct syscore that can be registered with the framework. Add a void * driver data field for drivers to store contextual data that will be passed to the syscore ops. Acked-by: Rafael J. Wysocki (Intel) Signed-off-by: Thierry Reding Stable-dep-of: cee0d90bceae ("Drivers: hv: vmbus: Skip VMBus module cleanup for non-nested root partition") Signed-off-by: Sasha Levin

bus: mhi: host: Fix controller cleanup on EDL sysfs failure

2026-09-14T11:35:13+00:00

[ Upstream commit 0d5b9e66591d4e2a4376ac82c8cda889a29ba3ee ] mhi_register_controller() adds the controller device before creating the optional trigger_edl sysfs file. If sysfs_create_file() fails, the error path only drops the device reference and leaves the device registered. Hence, call device_del() in the error path before put_device(). Fixes: 17553ba8e19d ("bus: mhi: host: Add sysfs entry to force device to enter EDL") Signed-off-by: Yuho Choi Signed-off-by: Manivannan Sadhasivam Signed-off-by: Sasha Levin

bus: mhi: host: Flush the posted write after writing to MHI_SOC_RESET_REQ_OFFSET

2026-09-14T11:35:13+00:00

[ Upstream commit 24f4423cbc89548def2b05ae86de6175086dbf94 ] mhi_soc_reset() tries to reset the device by writing to the MHI_SOC_RESET_REQ_OFFSET register. But it doesn't do a read-back to ensure that the write gets flushed to the device before returning to the caller. This may lead to the delay (if implemented) on the caller to be insufficient, if the posted write doesn't reach the device before the delay. So add a read-back after writing to the MHI_SOC_RESET_REQ_OFFSET register. Fixes: b5a8d233a588 ("bus: mhi: core: Add device hardware reset support") Reported-by: Alex Williamson Closes: https://lore.kernel.org/linux-pci/20260622160822.09350246@shazbot.org Signed-off-by: Manivannan Sadhasivam Signed-off-by: Manivannan Sadhasivam Reviewed-by: Jeff Hugo Link: https://patch.msgid.link/20260623145134.43976-1-manivannan.sadhasivam@oss.qualcomm.com Signed-off-by: Sasha Levin

bus: qcom-ebi2: use managed resources for clocks and children

2026-09-14T11:34:37+00:00

[ Upstream commit d19a46f7ed8eb54fea61e0eaf7db53ff7babb03c ] qcom_ebi2_probe() enables the EBI2 clocks manually and populates child devices manually. Several later failure paths can then return without disabling the clocks or without relying on the driver core to undo child population. Use devm_clk_get_enabled() for both clocks and devm_of_platform_populate() for children. This lets the driver core unwind the resources automatically and removes the hand-written error labels. Fixes: 335a12754808 ("bus: qcom: add EBI2 driver") Signed-off-by: Pengpeng Hou Reviewed-by: Konrad Dybcio Reviewed-by: Linus Walleij Link: https://lore.kernel.org/r/20260623015415.26975-1-pengpeng@iscas.ac.cn Signed-off-by: Bjorn Andersson Signed-off-by: Sasha Levin

bus: mhi: ep: Fix device refcount leak in the error path of MHI device creation

2026-09-14T11:34:33+00:00

[ Upstream commit 6f12862600bb70e599a614d706a095ea5f8f9858 ] mhi_ep_create_device() takes one device reference for the UL channel and another for the DL channel after allocating the transfer device. These references are normally released by mhi_ep_destroy_device() before the device itself is removed. If dev_set_name() or device_add() fails, the error path currently drops only one reference. The remaining channel references keep the device from being released and leave the channels associated with a device that was never registered. Route both failures through a common unwind path that drops the DL channel reference, the UL channel reference, and the initial reference from device_initialize(). Fixes: 297c77a0f273 ("bus: mhi: ep: Add support for creating and destroying MHI EP devices") Signed-off-by: Yuho Choi Signed-off-by: Manivannan Sadhasivam Link: https://patch.msgid.link/20260603195142.2189386-1-dbgh9129@gmail.com Signed-off-by: Sasha Levin

bus: qcom-ebi2: Fix clock leak on probe failure

2026-09-14T11:34:30+00:00

[ Upstream commit 64774dea58969194ea5c27fa639954e551a87024 ] qcom_ebi2_probe() enables the EBI2X and EBI2 clocks before it walks child nodes and populates child devices. If reading a child node's reg property fails, or if of_platform_default_populate() fails, probe returns without disabling either clock. Route those failure paths through the existing clock cleanup labels so a failed probe does not leave the clocks prepared and enabled. Fixes: 335a12754808 ("bus: qcom: add EBI2 driver") Signed-off-by: Ruoyu Wang Link: https://lore.kernel.org/r/20260620080406.1970447-1-ruoyuw560@gmail.com Signed-off-by: Bjorn Andersson Signed-off-by: Sasha Levin

bus: qcom-ebi2: Simplify with scoped for each OF child loop

2026-09-14T11:34:30+00:00

[ Upstream commit 9c252f3c8f390fae4ca09de36c9262a35ae88ace ] Use scoped for-each loop when iterating over device nodes to make code a bit simpler. Signed-off-by: Krzysztof Kozlowski Reviewed-by: Konrad Dybcio Link: https://lore.kernel.org/r/20260102125030.65186-3-krzysztof.kozlowski@oss.qualcomm.com Signed-off-by: Bjorn Andersson Stable-dep-of: 64774dea5896 ("bus: qcom-ebi2: Fix clock leak on probe failure") Signed-off-by: Sasha Levin

bus: ti-sysc: Fix /chosen node reference leak

2026-09-14T11:34:29+00:00

[ Upstream commit 6342de0aed216b6df460b492ddb532b3e0ed16f1 ] sysc_init_stdout_path() gets the /chosen node with of_find_node_by_path() to read stdout-path. The function then overwrites the local node pointer with the stdout-path lookup result, or exits on error, without dropping the /chosen reference. Keep the /chosen node in a separate variable and put it after the stdout-path value has been used for the lookup. The successful stdout node lookup remains referenced by the cached stdout_path pointer. Fixes: 3bb37c8e6e6a ("bus: ti-sysc: Handle stdout-path for debug console") Signed-off-by: Yuho Choi Reviewed-by: Andreas Kemnade Link: https://patch.msgid.link/20260615200540.770205-1-dbgh9129@gmail.com Signed-off-by: Kevin Hilman (TI) Signed-off-by: Sasha Levin

bus: mhi: ep: Protect mhi_ep_handle_syserr() in the error path

2026-07-24T14:17:03+00:00

commit 519ddf194b158b91439319f6b977b8a465fda0fb upstream. All the callers of mhi_ep_handle_syserr() except mhi_ep_process_cmd_ring() are holding the 'state_lock' to avoid the race in setting the MHI state. So do the same in mhi_ep_process_cmd_ring() for sanity. Fixes: e827569062a8 ("bus: mhi: ep: Add support for processing command rings") Cc: stable@vger.kernel.org # 5.18 Signed-off-by: Manivannan Sadhasivam Link: https://patch.msgid.link/20260302085612.18725-1-manivannan.sadhasivam@oss.qualcomm.com Signed-off-by: Greg Kroah-Hartman

bus: mhi: host: pci_generic: Fix the physical function check

2026-07-24T14:17:03+00:00

commit 32845111e8ea6ef5e837b6d25080e69e99bd4561 upstream. Commit b4d01c5b9a9d ("bus: mhi: host: pci_generic: Read SUBSYSTEM_VENDOR_ID for VF's to check status") added the check for physical function by checking for 'pdev->is_physfn. But 'pdev->is_physfn' is only set for the physical function of a SR-IOV capable device. But for the non-SR-IOV device this variable will be 0. So this check ended up breaking the health check functionality for all non-SR-IOV devices. Fix it by checking for '!pdev->is_virtfn' to make sure that the check is only skipped for virtual functions. Cc: stable@vger.kernel.org # 6.18 Reported-by: Slark Xiao Tested-by: Slark Xiao Fixes: b4d01c5b9a9d ("bus: mhi: host: pci_generic: Read SUBSYSTEM_VENDOR_ID for VF's to check status") Signed-off-by: Manivannan Sadhasivam Signed-off-by: Greg Kroah-Hartman