hwstamp_ctl: explain ERANGE error better
ERANGE is used by the kernel to indicate the hardware does not support the requested time stamping mode. Explain this error to the user. Signed-off-by: Jiri Benc <jbenc@redhat.com>master
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fb1b781413
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@ -139,10 +139,14 @@ int main(int argc, char *argv[])
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}
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err = ioctl(fd, SIOCSHWTSTAMP, &ifreq);
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err = ioctl(fd, SIOCSHWTSTAMP, &ifreq);
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if (err < 0)
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if (err < 0) {
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err = errno;
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perror("SIOCSHWTSTAMP failed");
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perror("SIOCSHWTSTAMP failed");
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if (err == ERANGE)
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fprintf(stderr, "The requested time stamping mode is not supported by the hardware.\n");
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}
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printf("tx_type %d\n" "rx_filter %d\n", cfg.tx_type, cfg.rx_filter);
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printf("tx_type %d\n" "rx_filter %d\n", cfg.tx_type, cfg.rx_filter);
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return err ? errno : 0;
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return err;
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}
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}
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