kernel/drivers/message/fusion/mptbase.c, branch linux-rolling-stable

scsi: message: fusion: Add WQ_PERCPU to alloc_workqueue() users

2025-11-13T02:28:26Z

Currently if a user enqueues a work item using schedule_delayed_work() the used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to schedule_work() that is using system_wq and queue_work(), that makes use again of WORK_CPU_UNBOUND. This lack of consistency cannot be addressed without refactoring the API. alloc_workqueue() treats all queues as per-CPU by default, while unbound workqueues must opt-in via WQ_UNBOUND. This default is suboptimal: most workloads benefit from unbound queues, allowing the scheduler to place worker threads where they’re needed and reducing noise when CPUs are isolated. This continues the effort to refactor workqueue APIs, which began with the introduction of new workqueues and a new alloc_workqueue flag in: commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq") commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag") This change adds a new WQ_PERCPU flag to explicitly request alloc_workqueue() to be per-cpu when WQ_UNBOUND has not been specified. With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND), any alloc_workqueue() caller that doesn’t explicitly specify WQ_UNBOUND must now use WQ_PERCPU. Once migration is complete, WQ_UNBOUND can be removed and unbound will become the implicit default. Suggested-by: Tejun Heo Signed-off-by: Marco Crivellari Link: https://patch.msgid.link/20251107141458.225119-1-marco.crivellari@suse.com Signed-off-by: Martin K. Petersen

scsi: mptfusion: Simplify the alloc*_workqueue() invocations

2024-08-23T01:28:55Z

Let alloc*_workqueue() format the workqueue names instead of calling snprintf() explicitly. Signed-off-by: Bart Van Assche Link: https://lore.kernel.org/r/20240822195944.654691-3-bvanassche@acm.org Signed-off-by: Martin K. Petersen

scsi: message: fusion: Replace all non-returning strlcpy() with strscpy()

2023-05-31T22:03:33Z

strlcpy() reads the entire source buffer first. This read may exceed the destination size limit. This is both inefficient and can lead to linear read overflows if a source string is not NUL-terminated [1]. In an effort to remove strlcpy() completely [2], replace strlcpy() here with strscpy(). No return values were used, so direct replacement is safe. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy [2] https://github.com/KSPP/linux/issues/89 Signed-off-by: Azeem Shaikh Link: https://lore.kernel.org/r/20230530160248.411637-1-azeemshaikh38@gmail.com Reviewed-by: Kees Cook Signed-off-by: Martin K. Petersen

scsi: message: fusion: Mark mpt_halt_firmware() __noreturn

2023-04-14T15:31:27Z

mpt_halt_firmware() doesn't return. Mark it as such. Fixes the following warnings: vmlinux.o: warning: objtool: mptscsih_abort+0x7f4: unreachable instruction vmlinux.o: warning: objtool: mptctl_timeout_expired+0x310: unreachable instruction Reported-by: kernel test robot Reported-by: Mark Rutland Debugged-by: Peter Zijlstra Signed-off-by: Josh Poimboeuf Signed-off-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/d8129817423422355bf30e90dadc6764261b53e0.1681342859.git.jpoimboe@kernel.org

scsi: message: fusion: Remove redundant variable dmp

2022-04-07T02:28:07Z

Variable dmp is being assigned a value that is never read, the variable is redundant and can be removed. Cleans up clang scan build warning: drivers/message/fusion/mptbase.c:6667:39: warning: Although the value stored to 'dmp' is used in the enclosing expression, the value is never actually read from 'dmp' [deadcode.DeadStores] Link: https://lore.kernel.org/r/20220318003927.81471-1-colin.i.king@gmail.com Reviewed-by: Nick Desaulniers Signed-off-by: Colin Ian King Signed-off-by: Martin K. Petersen

scsi: message: fusion: mptbase: Use dma_alloc_coherent()

2022-01-10T15:33:51Z

In [1], Christoph Hellwig has proposed to remove the wrappers in include/linux/pci-dma-compat.h. Some reasons why this API should be removed have been given by Julia Lawall in [2]. In all these places where some memory is allocated GFP_KERNEL can be used because they already call mpt_config() which has an explicit might_sleep(). [1]: https://lore.kernel.org/kernel-janitors/20200421081257.GA131897@infradead.org/ [2]: https://lore.kernel.org/kernel-janitors/alpine.DEB.2.22.394.2007120902170.2424@hadrien/ Link: https://lore.kernel.org/r/3bea2452deb8cc8be65982e87efa4c6861caa01c.1641500561.git.christophe.jaillet@wanadoo.fr Reviewed-by: Christoph Hellwig Signed-off-by: Christophe JAILLET Signed-off-by: Martin K. Petersen

scsi: message: fusion: Use dma_alloc_coherent() in mpt_alloc_fw_memory()

2022-01-10T15:33:51Z

In [1], Christoph Hellwig has proposed to remove the wrappers in include/linux/pci-dma-compat.h. Some reasons why this API should be removed have been given by Julia Lawall in [2]. mpt_alloc_fw_memory() should still use GFP_ATOMIC, because it can be called from mpt_do_upload() which might sleep. [1]: https://lore.kernel.org/kernel-janitors/20200421081257.GA131897@infradead.org/ [2]: https://lore.kernel.org/kernel-janitors/alpine.DEB.2.22.394.2007120902170.2424@hadrien/ Link: https://lore.kernel.org/r/db3db9db219005b75659561d08117d312d0cfb13.1641500561.git.christophe.jaillet@wanadoo.fr Reviewed-by: Christoph Hellwig Signed-off-by: Christophe JAILLET Signed-off-by: Martin K. Petersen

scsi: message: fusion: Remove usage of the deprecated "pci-dma-compat.h" API

2022-01-10T15:33:51Z

In [1], Christoph Hellwig has proposed to remove the wrappers in include/linux/pci-dma-compat.h. Some reasons why this API should be removed have been given by Julia Lawall in [2]. A coccinelle script has been used to perform the needed transformation. It can be found in [3]. In this patch, all functions but pci_alloc_consistent() are handled. pci_alloc_consistent() needs more attention and explanation. [1]: https://lore.kernel.org/kernel-janitors/20200421081257.GA131897@infradead.org/ [2]: https://lore.kernel.org/kernel-janitors/alpine.DEB.2.22.394.2007120902170.2424@hadrien/ [3]: https://lore.kernel.org/kernel-janitors/20200716192821.321233-1-christophe.jaillet@wanadoo.fr/ Link: https://lore.kernel.org/r/e38e897fbd3314718315b0e357c824e3f01775d6.1641500561.git.christophe.jaillet@wanadoo.fr Reviewed-by: Christoph Hellwig Signed-off-by: Christophe JAILLET Signed-off-by: Martin K. Petersen

scsi: mptfusion: Remove redundant variable r

2021-12-07T03:22:18Z

Variable r is being assigned a value that is never read. The assignment is redundant and so is the variable, so remove these. Remove unnecessary the {} braces in the if statement too. Link: https://lore.kernel.org/r/20211205225901.54362-1-colin.i.king@gmail.com Signed-off-by: Colin Ian King Signed-off-by: Martin K. Petersen

scsi: message: fusion: Remove unused mpt_pci driver .probe() 'id' parameter

2021-10-12T22:37:15Z

The only two drivers don't make use of the id parameter, so drop it. This is a step toward removing pci_dev->driver. Link: https://lore.kernel.org/r/20211004125935.2300113-9-u.kleine-koenig@pengutronix.de Signed-off-by: Uwe Kleine-König Signed-off-by: Bjorn Helgaas Reviewed-by: Christoph Hellwig Acked-by: Martin K. Petersen