kernel/linux.git/drivers/usb/storage/usb.c, branch linux-7.0.y

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

usb-storage: reject probe of device one non-DMA HCDs when using highmem

2025-05-05T19:22:39+00:00

usb-storage is the last user of the block layer bounce buffering now, and only uses it for HCDs that do not support DMA on highmem configs. Remove this support and fail the probe so that the block layer bounce buffering can go away. Signed-off-by: Christoph Hellwig Acked-by: Greg Kroah-Hartman Reviewed-by: Hannes Reinecke Reviewed-by: Alan Stern Reviewed-by: Johannes Thumshirn Link: https://lore.kernel.org/r/20250505081138.3435992-5-hch@lst.de Signed-off-by: Jens Axboe

usb-storage: Optimize scan delay more precisely

2024-06-04T13:40:47+00:00

Current storage scan delay is reduced by the following old commit. a4a47bc03fe5 ("Lower USB storage settling delay to something more reasonable") It means that delay is at least 'one second', or zero with delay_use=0. 'one second' is still long delay especially for embedded system but when delay_use is set to 0 (no delay), still error observed on some USB drives. So delay_use should not be set to 0 but 'one second' is quite long. Especially for embedded system, it's important for end user how quickly access to USB drive when it's connected. That's why we have a chance to minimize such a constant long delay. This patch optimizes scan delay more precisely to minimize delay time but not to have any problems on USB drives by extending module parameter 'delay_use' in milliseconds internally. The parameter 'delay_use' optionally supports in milliseconds if it ends with 'ms'. It makes the range of value to 1 / 1000 in internal 32-bit value but it's still enough to set the delay time. By default, delay time is 'one second' for backward compatibility. For example, it seems to be good by changing delay_use=100ms, that is 100 millisecond delay without issues for most USB pen drives. Signed-off-by: Norihiko Hama Link: https://lore.kernel.org/r/20240515004339.29892-1-Norihiko.Hama@alpsalpine.com Signed-off-by: Greg Kroah-Hartman

scsi: core: Add a no_highmem flag to struct Scsi_Host

2024-04-12T01:37:48+00:00

While we really should be killing the block layer bounce buffering ASAP, I even more urgently need to stop the drivers to fiddle with the limits from ->slave_configure. Add a no_highmem flag to the Scsi_Host to centralize this setting and switch the remaining four drivers that use block layer bounce buffering to it. Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/r/20240409143748.980206-7-hch@lst.de Reviewed-by: Bart Van Assche Reviewed-by: Damien Le Moal Reviewed-by: John Garry Reviewed-by: Hannes Reinecke Reviewed-by: Johannes Thumshirn Signed-off-by: Martin K. Petersen

usb-storage,uas: make internal quirks flags 64bit

2023-10-21T10:45:14+00:00

Switch internal usb-storage quirk value to 64-bit as quirks currently use all 32 bits. Signed-off-by: Milan Broz Reviewed-by: Alan Stern Link: https://lore.kernel.org/r/20231016072604.40179-3-gmazyland@gmail.com Signed-off-by: Greg Kroah-Hartman

usb-storage: remove UNUSUAL_VENDOR_INTF macro

2023-10-21T10:44:07+00:00

This patch removes macro that was used only by commit that was reverted in commit ab4b71644a26 ("USB: storage: fix Huawei mode switching regression") Signed-off-by: Milan Broz Reviewed-by: Alan Stern Link: https://lore.kernel.org/r/20231016072604.40179-2-gmazyland@gmail.com Signed-off-by: Greg Kroah-Hartman

scsi: usb: uas: Declare two host templates and host template pointers const

2023-03-24T23:20:00+00:00

Improve source code documentation by constifying host templates that are not modified. Acked-by: Alan Stern (for usb-storage) Acked-by: Oliver Neukum Acked-by: Greg Kroah-Hartman Cc: Oliver Neukum Cc: linux-usb@vger.kernel.org Signed-off-by: Bart Van Assche Link: https://lore.kernel.org/r/20230322195515.1267197-81-bvanassche@acm.org Signed-off-by: Martin K. Petersen

scsi: usb: storage: Complete the SCSI request directly

2022-02-08T04:14:15+00:00

The USB storage driver can complete its requests directly from a kernel thread. Use scsi_done_direct() to avoid waking ksoftirqd. Link: https://lore.kernel.org/r/20220201210954.570896-3-sebastian@breakpoint.cc Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Martin K. Petersen

scsi: usb: Call scsi_done() directly

2021-10-17T01:31:43+00:00

Conditional statements are faster than indirect calls. Hence call scsi_done() directly. Link: https://lore.kernel.org/r/20211007204618.2196847-10-bvanassche@acm.org Signed-off-by: Bart Van Assche Signed-off-by: Martin K. Petersen