kernel/drivers/usb/host/ehci-mem.c, branch linux-6.9.y

usb: host: ehci: Make use of dma_pool_zalloc() instead of dma_pool_alloc/memset()

2021-10-21T10:47:56Z

Replacing dma_pool_alloc/memset() with dma_pool_zalloc() to simplify the code. Signed-off-by: Cai Huoqing Link: https://lore.kernel.org/r/20211018131645.434-1-caihuoqing@baidu.com Signed-off-by: Greg Kroah-Hartman

Revert "usb: host: ehci: Use dma_pool_zalloc()"

2018-05-04T21:35:12Z

This reverts commit 22072e83ebd510fb6a090aef9d65ccfda9b1e7e4 as it is broken. Alan writes: What you can't see just from reading the patch is that in both cases (ehci->itd_pool and ehci->sitd_pool) there are two allocation paths -- the two branches of an "if" statement -- and only one of the paths calls dma_pool_[z]alloc. However, the memset is needed for both paths, and so it can't be eliminated. Given that it must be present, there's no advantage to calling dma_pool_zalloc rather than dma_pool_alloc. Reported-by: Erick Cafferata Cc: Alan Stern Cc: Souptick Joarder Signed-off-by: Greg Kroah-Hartman

usb: host: ehci: Use dma_pool_zalloc()

2018-02-22T14:17:05Z

Use dma_pool_zalloc() instead of dma_pool_alloc + memset Signed-off-by: Souptick Joarder Acked-by: Alan Stern Signed-off-by: Greg Kroah-Hartman

USB: host: ehci: Remove redundant license text

2017-11-07T14:45:02Z

Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Acked-by: Alan Stern Signed-off-by: Greg Kroah-Hartman

USB: add SPDX identifiers to all remaining files in drivers/usb/

2017-11-04T10:48:02Z

It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the drivers/usb/ and include/linux/usb* files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Thomas Gleixner Cc: Kate Stewart Cc: Philippe Ombredanne Signed-off-by: Greg Kroah-Hartman Acked-by: Felipe Balbi Acked-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman

usb: ehci: use bus->sysdev for DMA configuration

2017-03-23T07:20:21Z

Set the dma for ehci from sysdev. The sysdev is pointing to device that is known to the system firmware or hardware. Cc: Arnd Bergmann Cc: Sriram Dash Signed-off-by: Peter Chen Acked-by: Alan Stern Signed-off-by: Greg Kroah-Hartman

USB-EHCI: Delete unnecessary checks before the function call "dma_pool_destroy"

2015-12-01T22:26:33Z

The dma_pool_destroy() function tests whether its argument is NULL and then returns immediately. Thus the test around the calls is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring Acked-by: Alan Stern Signed-off-by: Greg Kroah-Hartman

USB: EHCI: don't allocate hardware periodic table atomically by default

2014-07-09T23:16:07Z

ehci_mem_init() is executed one time during ehci_init() and by default all memory allocations but ehci->periodic are done not atomically, GFP_KERNEL is passed as flags parameter. Do similar allocation for ehci->periodic and free some space in coherent atomic DMA pool by default. Signed-off-by: Vladimir Zapolskiy Acked-by: Alan Stern Signed-off-by: Greg Kroah-Hartman

USB: EHCI: fix sparse errors

2013-10-19T21:08:04Z

This patch fixes several sparse errors in ehci-hcd introduced by commit 3d091a6f7039 (USB: EHCI: AMD periodic frame list table quirk). Although the problem fixed by that commit affects only little-endian systems, the source code has to use types appropriate for big-endian too. Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman

USB: EHCI: improve interrupt qh unlink

2013-08-12T18:43:48Z

ehci-hcd currently unlinks an interrupt QH when it becomes empty, that is, after its last URB completes. This works well because in almost all cases, the completion handler for an interrupt URB resubmits the URB; therefore the QH doesn't become empty and doesn't get unlinked. When we start using tasklets for URB completion, this scheme won't work as well. The resubmission won't occur until the tasklet runs, which will be some time after the completion is queued with the tasklet. During that delay, the QH will be empty and so will be unlinked unnecessarily. To prevent this problem, this patch adds a 5-ms time delay before empty interrupt QHs are unlinked. Most often, during that time the interrupt URB will be resubmitted and thus we can avoid unlinking the QH. Signed-off-by: Alan Stern Signed-off-by: Ming Lei Signed-off-by: Greg Kroah-Hartman