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authorMark Brown <broonie@linaro.org>2014-01-14 14:14:47 +0000
committerMark Brown <broonie@linaro.org>2014-01-14 14:14:47 +0000
commit13ea3300100ec3461560b1e061033cd167333a86 (patch)
treec60a016a06c488adada6959516e2a2de96d6d7d3 /include/linux/usb.h
parentb7ed6b88b2a5e961eeb939ef637a3cbb435a23a7 (diff)
parent68e67d97e1f91ed11e041b67f3a1336f518c608f (diff)
Merge branch 'topic/rcar' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-rspi
Diffstat (limited to 'include/linux/usb.h')
-rw-r--r--include/linux/usb.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 7454865ad14..512ab162832 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -1264,6 +1264,8 @@ typedef void (*usb_complete_t)(struct urb *);
* @sg: scatter gather buffer list, the buffer size of each element in
* the list (except the last) must be divisible by the endpoint's
* max packet size if no_sg_constraint isn't set in 'struct usb_bus'
+ * (FIXME: scatter-gather under xHCI is broken for periodic transfers.
+ * Do not use urb->sg for interrupt endpoints for now, only bulk.)
* @num_mapped_sgs: (internal) number of mapped sg entries
* @num_sgs: number of entries in the sg list
* @transfer_buffer_length: How big is transfer_buffer. The transfer may