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a0df8d9450
The tail of the list lives at the position before the head. This is mathematically noted as: ``` (head-1) mod size. ``` Unfortunately C, does not have a modulus operator, but a remainder operator (%). The reminder operation has a different result than the modulus if (head -1) is a negative number and size is not a power of two. Adding size to (head-1) allows the code to run with any value of size. This does not change the current behaviour of the driver, as the size is always a power of two, but avoid tedious debugging if we ever change its size. Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> Reviewed-by: Tomasz Figa <tfiga@chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Link: https://lore.kernel.org/r/20240323-resend-hwtimestamp-v10-1-b08e590d97c7@chromium.org Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> |
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| airspy | ||
| as102 | ||
| au0828 | ||
| b2c2 | ||
| cx231xx | ||
| dvb-usb | ||
| dvb-usb-v2 | ||
| em28xx | ||
| go7007 | ||
| gspca | ||
| hackrf | ||
| hdpvr | ||
| msi2500 | ||
| pvrusb2 | ||
| pwc | ||
| s2255 | ||
| siano | ||
| stk1160 | ||
| ttusb-budget | ||
| ttusb-dec | ||
| usbtv | ||
| uvc | ||
| Kconfig | ||
| Makefile | ||