Searched hist:274191 (Results 1 - 1 of 1) sorted by relevance
| /freebsd-11-stable/sys/arm/arm/ | ||
| H A D | busdma_machdep-v6.c | diff 274191 Thu Nov 06 17:25:05 MST 2014 ian Strengthen the sanity checking of busdma tag parameters. It turns out an alignment of zero can lead to an endless loop in the vm reservations code, so specifically disallow that. The manpage says hardware which can do dma at any address should use a value of one, which hints at the forbiddeness of zero without exactly saying it. Several other conditions which could lead to insanity in working with the tag are also checked now. Every existing call to bus_dma_tag_create() (about 680 of them) was eyeballed for violations of these things, and two alignment=0 glitches were fixed. It's possible something was missed, but overall this shouldn't lead to any arm users suddenly experiencing failures. |
Completed in 138 milliseconds