From: Peter Hurley Date: Tue, 29 Jan 2013 01:57:48 +0000 (-0500) Subject: staging/fwserial: Assume firmware is OHCI-complaint X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=9883a7396b9cc36e27185f2da9f81f23f2ab67ae;p=deliverable%2Flinux.git staging/fwserial: Assume firmware is OHCI-complaint Devices which are OHCI v1.0/ v1.1/ v1.2-draft compliant or RFC 2734 compliant are required by specification to support max_rec of 8 (512 bytes) or more. Accept reported value. Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/fwserial/fwserial.c b/drivers/staging/fwserial/fwserial.c index 815c01119583..59e90e666d7b 100644 --- a/drivers/staging/fwserial/fwserial.c +++ b/drivers/staging/fwserial/fwserial.c @@ -174,10 +174,15 @@ static void dump_profile(struct seq_file *m, struct stats *stats) #define dump_profile(m, stats) #endif -/* Returns the max receive packet size for the given node */ +/* + * Returns the max receive packet size for the given node + * Devices which are OHCI v1.0/ v1.1/ v1.2-draft or RFC 2734 compliant + * are required by specification to support max_rec of 8 (512 bytes) or more. + */ static inline int device_max_receive(struct fw_device *fw_device) { - return 1 << (clamp_t(int, fw_device->max_rec, 8U, 11U) + 1); + /* see IEEE 1394-2008 table 8-8 */ + return min(2 << fw_device->max_rec, 4096); } static void fwtty_log_tx_error(struct fwtty_port *port, int rcode)