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The maximum NCM frame size must be so that it

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will generate a short terminated USB transfer if
the maximum NCM frame size is greater than what
the driver can handle.

Reported by:	Matthias Benesch
MFC after:	7 days
Approved by:	thompsa (mentor)
This commit is contained in:
Hans Petter Selasky 2011-04-26 19:40:37 +00:00
parent 7a2b83683d
commit 4309793b64
1 changed files with 1 additions and 1 deletions
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2
sys/dev/usb/net/if_cdcereg.h
View file

@ -39,7 +39,7 @@
#define CDCE_IND_SIZE_MAX 32 /* bytes */
#define CDCE_NCM_TX_MINLEN 512 /* bytes, must be power of two */
#define CDCE_NCM_TX_MAXLEN (1UL << 14) /* bytes */
#define CDCE_NCM_TX_MAXLEN (16384 + 4) /* bytes, must be short terminated */
#define CDCE_NCM_TX_FRAMES_MAX 8 /* units */
#define CDCE_NCM_RX_MAXLEN (1UL << 14) /* bytes */