From: Aaro Koskinen > octeon-hcd will crash the kernel when SLOB is used. This usually happens > after the 18-byte control transfer when a device descriptor is read. > The DMA engine is always transfering full 32-bit words and if the > transfer is shorter, some random garbage appears after the buffer. > The problem is not visible with SLUB since it rounds up the allocations > to word boundary, and the extra bytes will go undetected. > > Fix by providing quirk functions for DMA map/unmap that allocate a bigger > temporary buffer when necessary. Tested by booting EdgeRouter Lite > to USB stick root file system with SLAB, SLOB and SLUB kernels. Wouldn't it be simpler to just round up the existing allocation? (With a comment that some DMA controllers write whole words.) David -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
