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Patch from Steven Scholz:
should we rename the define into CONFIG_FEATURE_HDPARM_HDIO_DMA and use it for "set" and "get" ??? Since although CONFIG_FEATURE_HDPARM_HDIO_GET_DMA is _not_ set I still can use "hdparm -d 1 /dev/hda" to switch the DMA on. Is this desireable or meant to be like that? So how about the applied patch?
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@ -835,6 +835,12 @@
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#define USAGE_TRISTATE_HWIF(a)
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#endif
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#ifdef CONFIG_FEATURE_HDPARM_HDIO_GETSET_DMA
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#define USAGE_GETSET_DMA(a) a
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#else
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#define USAGE_GETSET_DMA(a)
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#endif
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#define hdparm_trivial_usage \
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"[options] [device] .."
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#define hdparm_full_usage \
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@ -845,7 +851,7 @@
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" -B set Advanced Power Management setting (1-255)\n" \
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" -c get/set IDE 32-bit IO setting\n" \
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" -C check IDE power mode status\n" \
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" -d get/set using_dma flag\n" \
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USAGE_GETSET_DMA(" -d get/set using_dma flag\n") \
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" -D enable/disable drive defect-mgmt\n" \
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" -f flush buffer cache for device on exit\n" \
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" -g display drive geometry\n" \
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@ -100,6 +100,14 @@ config CONFIG_FEATURE_HDPARM_HDIO_TRISTATE_HWIF
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and the '-b' option to get/set bus state. This is dangerous
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stuff, so you should probably say N.
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config CONFIG_FEATURE_HDPARM_HDIO_GETSET_DMA
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bool " get/set using_dma flag (DANGEROUS)"
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default n
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depends on CONFIG_HDPARM
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help
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Enables the 'hdparm -d' option to get/set using_dma flag.
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This is dangerous stuff, so you should probably say N.
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config CONFIG_MAKEDEVS
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bool "makedevs"
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default n
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@ -1820,6 +1820,7 @@ static void process_dev (char *devname)
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if (ioctl(fd, HDIO_SET_UNMASKINTR, unmask))
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bb_perror_msg(" HDIO_SET_UNMASKINTR failed");
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}
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#ifdef CONFIG_FEATURE_HDPARM_HDIO_GETSET_DMA
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if (set_dma) {
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no_scsi();
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if (get_dma) {
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@ -1829,6 +1830,7 @@ static void process_dev (char *devname)
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if (ioctl(fd, HDIO_SET_DMA, dma))
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bb_perror_msg(" HDIO_SET_DMA failed");
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}
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#endif /* CONFIG_FEATURE_HDPARM_HDIO_GETSET_DMA */
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if (set_dma_q) {
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no_scsi();
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if (get_dma_q) {
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@ -2080,7 +2082,7 @@ static void process_dev (char *devname)
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}
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}
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#ifdef CONFIG_FEATURE_HDPARM_HDIO_GET_DMA
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#ifdef CONFIG_FEATURE_HDPARM_HDIO_GETSET_DMA
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if ((verbose && !is_scsi_hd) || get_dma) {
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no_scsi();
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if (ioctl(fd, HDIO_GET_DMA, &parm))
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@ -2382,6 +2384,7 @@ int hdparm_main(int argc, char **argv)
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unmask = *p++ - '0';
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}
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break;
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#ifdef CONFIG_FEATURE_HDPARM_HDIO_GETSET_DMA
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case 'd':
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get_dma = noisy;
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noisy = 1;
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@ -2392,6 +2395,7 @@ int hdparm_main(int argc, char **argv)
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dma = *p++ - '0';
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}
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break;
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#endif /* CONFIG_FEATURE_HDPARM_HDIO_GETSET_DMA */
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case 'n':
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get_nowerr = noisy;
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noisy = 1;
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