K 10
svn:author
V 3
jah
K 8
svn:date
V 27
2016-05-20T03:03:04.152325Z
K 7
svn:log
V 466
iic_rdwr_data->nmsgs is uint32_t, so limit the allowable number of messages to prevent memory exhaustion and short allocations on 32-bit systems. Since iicrdwr is intended to be a workalike of a Linux i2c-dev call, use the same limit of 42 that Linux uses.

Also check the return value of copyin(9) to prevent unnecessary allocation in the failure case.

Submitted by:	ngie
Reviewed by:	kib
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D5155

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